From c7a51ec7a08eefef82cf0ad6ce7903939c074883 Mon Sep 17 00:00:00 2001
From: tTh <tth@redlady.dinorama.fr>
Date: Wed, 6 Jul 2022 10:27:55 +0200
Subject: [PATCH] big cleanup, word on metadata

---
 Fonderie/interpolator.c |  3 +--
 LICENSE                 | 14 ++++++++++
 README.md               | 12 ++++++++-
 floatimg.h              | 37 ++++++++++++++++++++-----
 funcs/README.md         |  8 +++++-
 funcs/classif.c         |  4 ++-
 funcs/decomprgb.c       | 11 ++++----
 funcs/dithering.c       |  6 +++++
 funcs/equalize.c        |  4 ++-
 funcs/exporter.c        |  2 ++
 funcs/falsecolors.c     | 60 +++++++++++++++++++++++++++++++++++------
 funcs/filtrage.c        |  2 +-
 funcs/fimg-dicom.c      |  4 +--
 funcs/fimg-fits.c       |  2 ++
 funcs/fimg-libpnm.c     |  5 ++--
 funcs/fimg-tiff.c       |  3 +++
 funcs/geometry.c        |  7 ++++-
 funcs/hsv.c             |  5 +++-
 funcs/incrustator.c     | 14 +++++++---
 funcs/killrgb.c         |  6 ++---
 funcs/misc-plots.c      |  4 +++
 funcs/pixelize.c        | 10 +++----
 funcs/plasmas.c         |  8 +++---
 funcs/qsortrgb.c        |  4 +++
 funcs/rotate.c          |  2 ++
 funcs/sfx0.c            |  4 +--
 funcs/sfx2.c            | 10 +++++++
 funcs/sfx3.c            |  8 +++++-
 funcs/sfx4.c            | 12 ++++++++-
 funcs/tests.c           |  4 ++-
 funcs/utils.c           |  5 ++++
 lib/fimg-2gray.c        | 14 +++++++++-
 lib/fimg-file.c         | 13 ++++-----
 lib/fimg-math.c         |  6 +++++
 lib/fimg-pnm.c          |  8 +++++-
 lib/fimg-timers.c       |  5 ++++
 lib/metadata.c          | 16 ++++++++---
 lib/t.c                 | 21 +++++++++++----
 tools/addpnm2fimg.c     |  5 ++++
 tools/cumulfimgs.c      |  4 +--
 tools/fimg2fits.c       |  3 ++-
 tools/fimg2png.c        |  2 +-
 tools/fimg2text.c       | 10 ++++---
 tools/fimg2tiff.c       |  2 +-
 tools/fimgfx.c          | 25 ++++++++---------
 tools/fimghalfsize.c    |  1 +
 tools/fimgmetadata.c    | 13 +++++----
 tools/fimgops.c         |  2 +-
 v4l2/grabvidseq.c       | 23 +++++++++++-----
 49 files changed, 348 insertions(+), 105 deletions(-)
 create mode 100644 LICENSE

diff --git a/Fonderie/interpolator.c b/Fonderie/interpolator.c
index d25392a2..6436eafa 100644
--- a/Fonderie/interpolator.c
+++ b/Fonderie/interpolator.c
@@ -122,7 +122,7 @@ int		foo, idx, ipng, w, h, step;
 int		curpix;
 int		iarray[3];
 char		*cptr, line[200];
-float		coef, value;
+float		coef;
 double		meanmetric;
 IdxValue	*idx_values;			/* gni? */
 
@@ -175,7 +175,6 @@ for (idx=0; idx<globbuf.gl_pathc; idx++) {
 		fprintf(stderr, "load %s from dump -> %d\n", cptr, foo);
 		continue;
 		}
-	value = idx_values[idx].value;		/* WTF ? */
 
 	/* here was the input filter */
 	foo = filterstack_run(0, &B, 0);
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 00000000..5a8e3325
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,14 @@
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+
diff --git a/README.md b/README.md
index 3ba844f2..ccd1db38 100644
--- a/README.md
+++ b/README.md
@@ -38,8 +38,18 @@ apt  install  libv4l2-dev
 apt  install  libcfitsio-dev
 apt  install  libnetpbm-dev
 ```
+
+Bon, OK, je suis en train de changer de machine, et ça serait vraiment
+cool d'avoir juste une ligne à c'n'p, donc voila :
+
+```
+apt install  libtiff-dev libpnglite-dev  liblo-dev  libv4l2-dev \
+             libcfitsio-dev libnetpbm-dev
+```
+
 Il est probable que j'en oublie.
-Et ya Debian qui change des trucs, alors, ça marche plus
+Et ya Debian qui change des trucs, alors, ça marche plus, du
+genre que c'est la deuxième fois que ça m'arrive.
 
 ```
 E: Unable to locate package libv4l2-dev
diff --git a/floatimg.h b/floatimg.h
index 58df6dd4..f21f6ee7 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -1,14 +1,29 @@
 /*
  *			floatimg.h
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO.
+
  *			ugly code from tTh
- *	http://la.buvette.org/photos/cumul
+ *	http://la.buvette.org/photos/cumul/
  *	https://git.tetalab.org/tTh/FloatImg
  */
 
-#define		FIMG_VERSION	(187)
+#define		FIMG_VERSION	(197)
 #define		RELEASE_NAME	("noname")
 /*
- *	in memory descriptor
+ *	in memory descriptor of a floating image
  */
 #define MAGIC_FIMG	0x00F11F00
 typedef struct {
@@ -28,7 +43,11 @@ typedef struct {
 typedef struct {
 	char		magic[8];	// this is not an asciiz !
 	int32_t		w, h, t;
+	/*
+	 *  what about the packing ?
+	 */
 	} FimgFileHead;
+
 /*
  *		new 11 mars 2022, and a lot of iterations
  *		around the concept of metadata for my work.
@@ -46,7 +65,7 @@ typedef struct {
 	} FimgMetaData;
 /*
  *	we MUST look at packing and endianess problems NOW
- *	and we can thing about a fised size of this datablock
+ *	and we can think about a fised size of this datablock
  */
 
 
@@ -118,22 +137,26 @@ int fimg_mul_3(FloatImg *a, FloatImg *b, FloatImg *d);
 int fimg_minimum(FloatImg *a, FloatImg *b, FloatImg *d);
 int fimg_maximum(FloatImg *a, FloatImg *b, FloatImg *d);
 
-/*	funcs/filtrage.c		*/
 
+/* ---------------------------------------------------- */
+/*	funcs/filtrage.c		*/
 typedef struct {
 	float		matrix[9];
 	float		mult;
 	float		offset;
 	} FimgFilter3x3;
-
+/*
+ *	this module contains bugs...
+ */
 int fimg_killborders(FloatImg *img);
 int fimg_lissage_2x2(FloatImg *img);
 int fimg_show_filter(char *title, FimgFilter3x3 *filtr);
 int fimg_filter_3x3(FloatImg *s, FloatImg *d, FimgFilter3x3 *filtr);
 
-
 int fimg_contour_2x2(FloatImg *psrc, FloatImg *pdst, int reverse);
 
+/* ---------------------------------------------------- */
+
 /*	 module sfx0.c			*/
 int fimg_killcolors_a(FloatImg *fimg, float fval);
 int fimg_killcolors_b(FloatImg *fimg, float fval);
diff --git a/funcs/README.md b/funcs/README.md
index 0f7a09d8..cc7a4671 100644
--- a/funcs/README.md
+++ b/funcs/README.md
@@ -8,13 +8,19 @@ __Attention__ : la bibliothèque `pnglite`actuellement utilisée pour lire
 les fichiers PNG n'accepte que **certains** types de fichiers.
 Et en particulier, elle brotche sur ceux produits par ImageMagick !
 
+## FITS
+
+Un Format de fichier utilisé en astronomie. 
+
+https://heasarc.gsfc.nasa.gov/docs/software/fitsio/c/c_user/node1.html
+
 ## DICOM
 
 https://en.wikipedia.org/wiki/DICOM et ça semble bien compliqué :(
 
 ## Contours
 
-Détecter des contours est une activité respectable.
+Détecter des contours est une activité respectable. Mais difficile.
 
 ## Exporter
 
diff --git a/funcs/classif.c b/funcs/classif.c
index 9e880020..dfc7bb33 100644
--- a/funcs/classif.c
+++ b/funcs/classif.c
@@ -15,7 +15,7 @@ extern int		verbosity;
 /* --------------------------------------------------------------------- */
 /* nouveau 2 octobre 2020, juste avant sonoptic de la pluie craignos	 */
 
-int fimg_classif_trial(FloatImg *psrc, FloatImg *pdst, float fval, int notused)
+int fimg_classif_trial(FloatImg *psrc, FloatImg *pdst, float fval, int flags)
 {
 float		minmax[6], delta[3], baryc[3];
 float		range, dist, rgb[3], dr, dg, db;
@@ -26,6 +26,8 @@ fprintf(stderr, ">>> %s ( %p %p %f %d )\n", __func__,
 					psrc, pdst, fval, notused);
 #endif
 
+if (flags) { fprintf(stderr, "flags: 0x%04x in %s\n", flags, __func__); }
+
 if (FIMG_TYPE_RGB != psrc->type) {
 	fprintf(stderr, "%s: bad src type %d\n", __func__, psrc->type);
 	return -7;
diff --git a/funcs/decomprgb.c b/funcs/decomprgb.c
index 7ceaa772..1288a02a 100644
--- a/funcs/decomprgb.c
+++ b/funcs/decomprgb.c
@@ -23,15 +23,14 @@ extern int		verbosity;
 /*	A lot of strange and usefull parenthesis	*/
 
 /* == ---------------------------------------------------- == */
-
+#if DEBUG_LEVEL
 static float compute_z_value(float r, float g, float b)
 {
 double		dval;
 
-
-
 return 42.0;
 }
+#endif
 /* == ---------------------------------------------------- == */
 
 int fimg_decomp_rgbz_color(FloatImg *psrc, FloatImg *pdst, int k)
@@ -45,8 +44,9 @@ fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
 			psrc,  pdst, k);
 #endif
 
-fimg_clear(pdst);
+if (k) { fprintf(stderr, "k=%d in %s\n", k, __func__); }
 
+fimg_clear(pdst);
 w2 = psrc->width/2;	h2 = psrc->height/2;
 
 for (y=0; y<h2; y++)
@@ -102,8 +102,9 @@ fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
 			psrc,  pdst, k);
 #endif
 
-fimg_clear(pdst);
+if (k) { fprintf(stderr, "k=%d in %s\n", k, __func__); }
 
+fimg_clear(pdst);
 w2 = psrc->width/2;	h2 = psrc->height/2;
 
 for (y=0; y<h2; y++)
diff --git a/funcs/dithering.c b/funcs/dithering.c
index a8407cfd..e11c5b8c 100644
--- a/funcs/dithering.c
+++ b/funcs/dithering.c
@@ -17,6 +17,12 @@ int fimg_dither_0(FloatImg *psrc, FloatImg *pdst, int flags)
 {
 int		x, y;
 
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p 0x%04x )\n", __func__, psrc, pdst, flags);
+#endif
+
+if (flags) { fprintf(stderr, "flags: 0x%04x in %s\n", flags, __func__); }
+
 for (y=0; y<psrc->height; y++) {
 
 	for (x=0; x<psrc->width; x++)
diff --git a/funcs/equalize.c b/funcs/equalize.c
index fe2e07f7..36f4ab12 100644
--- a/funcs/equalize.c
+++ b/funcs/equalize.c
@@ -32,6 +32,8 @@ if (foo) {
 	return foo;
 	}
 
+fprintf(stderr, "vptr is %p   vmax is %f\n", vptr, vmax);
+
 dr = minmax[1] - minmax[0];
 dg = minmax[3] - minmax[2];
 db = minmax[5] - minmax[4];
@@ -45,7 +47,7 @@ if ( (minmax[0]<0.0) || (minmax[2]<0.0) || (minmax[4]<0.0) ) {
 	return -4;
 	}
 
-// printf("deltas  %12.4g  %12.4g  %12.4g\n", dr, dg, db);
+fprintf(stderr, "deltas  %12.4g  %12.4g  %12.4g\n", dr, dg, db);
 
 return 0;
 }
diff --git a/funcs/exporter.c b/funcs/exporter.c
index 30d233e3..5b3847c4 100644
--- a/funcs/exporter.c
+++ b/funcs/exporter.c
@@ -25,6 +25,8 @@ fprintf(stderr, ">>> %s ( %p '%s' 0x%X )\n", __func__,
 				pic, fname, flags);
 #endif
 
+if (flags) { fprintf(stderr, "flags: 0x%04x in %s\n", flags, __func__); }
+
 filetype = format_from_extension(fname);
 if (verbosity > 1) {
 	fprintf(stderr, "file %s have type %d\n", fname, filetype);
diff --git a/funcs/falsecolors.c b/funcs/falsecolors.c
index 663dd985..e20f9398 100644
--- a/funcs/falsecolors.c
+++ b/funcs/falsecolors.c
@@ -1,11 +1,15 @@
 /*
  *	FloatImg library from tTh - really ugly code inside
+ *
+ *		F A L S E   C O L O R S
+ *						or fake colors ?
  */
 
 #include  <stdio.h>
+#include  <stdlib.h>
 #include  <stdint.h>
 #include  <sys/time.h>
-
+#include  <math.h>
 #include  "../floatimg.h"
 
 /* -------------------------------------------------------------- */
@@ -13,27 +17,67 @@
 extern	int	verbosity;
 
 /* -------------------------------------------------------------- */
+/*			TRUCS A VOIR
+
+f(x,y) = (((y & x) * (y - x)) % ((21 & x) * (y | 8))) ^ (~((x & 7) | (x % x)))
 
 
+*/
 /* -------------------------------------------------------------- */
 /* nouveau 18 mai 2022 */
+/* please explain the meaning of 'valf' parameter */
 int fimg_falsecolors_0(FloatImg *src, FloatImg *dst, int k, float valf)
 {
-int		x, y;
+int		x, y, offset;
+float		r, g, b, gray, maxv;
 
+#if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %d %f )\n", __func__,
 					src, dst, k, valf);
+#endif
 
-for (y=0; y<src->height, y++) {
-	for (x=0; x<src->width, x++) {
+if (k) {
+	fprintf(stderr, "%s : %d %f\n", __func__, k, valf);
+	}
 
-		/***********************/
-		/* DO SOMETHING HERE ! */
-		/***********************/
+/* check validity of parameters */
+if (FIMG_TYPE_RGB != dst->type) {
+	fprintf(stderr, "in %s, picz at %p is not valid\n",
+			__func__, dst);
+	abort();
+		/* BLAM! */
+	}
 
+
+maxv = fimg_get_plane_maxvalue(src, 'r');
+fprintf(stderr, "%s: maxv of red plane = %f\n", __func__, maxv);
+
+/* enter big loop */
+offset = 0;
+for (y=0; y<src->height; y++) {
+	for (x=0; x<src->width; x++) {
+
+		gray = src->R[offset];
+
+		if (gray < maxv/2.0) {
+			r = gray * 2.0;
+			g = 0.0;
+			}
+		else 	{
+			r = 0.0;
+			g = gray * 2.0;
+			}
+		b = fmodf(gray*8.0, maxv);
+
+		dst->R[offset] = r;
+		dst->G[offset] = g;
+		dst->B[offset] = b;
+
+		/* and GOTO next pixel */
+		offset++;
 		}
 	}
 
-return -1;
+return 0;
 }
 /* -------------------------------------------------------------- */
diff --git a/funcs/filtrage.c b/funcs/filtrage.c
index a8f278f9..e4b25b27 100644
--- a/funcs/filtrage.c
+++ b/funcs/filtrage.c
@@ -16,7 +16,7 @@ extern int		verbosity;
 int fimg_show_filter(char *title, FimgFilter3x3 *filtr)
 {
 float		*M;			/* alias of filter matrix */
-int		foo, idx;
+int		idx;
 float		sum, value;
 
 if (title)	fprintf(stderr, "--------- %s ---------\n", title);
diff --git a/funcs/fimg-dicom.c b/funcs/fimg-dicom.c
index c6f77d79..164a168c 100644
--- a/funcs/fimg-dicom.c
+++ b/funcs/fimg-dicom.c
@@ -17,12 +17,12 @@ extern int verbosity;		/* must be declared around main() */
 int fimg_save_plane_as_dicom(FloatImg *src, char *outname,
 						char plane, int flags)
 {
-int		foo;
 float		*planeptr;
 
 fprintf(stderr, ">>> %s ( %p %s %c %d )\n", __func__, src, outname, plane, flags);
 
-planeptr = charplane2int(plane, src);
+planeptr = charplane2int(plane, src);		/* please explain XXX */
+fprintf(stderr, "planeptr is %p\n", planeptr);
 
 if (verbosity) {
 	fimg_describe(src, outname);
diff --git a/funcs/fimg-fits.c b/funcs/fimg-fits.c
index 33f26977..95698500 100644
--- a/funcs/fimg-fits.c
+++ b/funcs/fimg-fits.c
@@ -32,6 +32,8 @@ long		naxes[2];
 fprintf(stderr, ">>> %s ( %p '%s' %d )\n", __func__, src, outname, flags);
 #endif
 
+if (flags) { fprintf(stderr, "flags: 0x%04x in %s\n", flags, __func__); }
+
 status = 0;
 
 switch (plane) {
diff --git a/funcs/fimg-libpnm.c b/funcs/fimg-libpnm.c
index 4f409701..881f6b8f 100644
--- a/funcs/fimg-libpnm.c
+++ b/funcs/fimg-libpnm.c
@@ -14,9 +14,9 @@
 extern int		verbosity;
 
 /* --------------------------------------------------------------------- */
-static void print_struct_pam(struct pam *ppam, char *txt)
+static void print_struct_pam(struct pam *ppam, char *text)
 {
-
+printf("    text                %s\n", text);
 printf("    size                %d\n", ppam->size);
 
 printf("    format              %d\n", ppam->format);
@@ -24,7 +24,6 @@ printf("    plainformat         %d\n", ppam->plainformat);
 printf("    width & height      %d %d\n", ppam->width, ppam->height);
 printf("    depth               %d\n", ppam->depth);
 printf("    maxval              %lu\n", ppam->maxval);
-
 }
 /* --------------------------------------------------------------------- */
 
diff --git a/funcs/fimg-tiff.c b/funcs/fimg-tiff.c
index 6cd0721c..5519af87 100644
--- a/funcs/fimg-tiff.c
+++ b/funcs/fimg-tiff.c
@@ -23,6 +23,9 @@ int			x, y, idx, foo;
 char			ligne[100];
 double			maximum, fk;
 
+if (flags) fprintf(stderr, "in %s, flags are 0x%04x, must be 0\n",
+				__func__,	flags);
+
 		/* bon, tout cela semble bien tortueux ! */
 
 if (FIMG_TYPE_RGB != src->type) {
diff --git a/funcs/geometry.c b/funcs/geometry.c
index 2dc4223d..b5c71726 100644
--- a/funcs/geometry.c
+++ b/funcs/geometry.c
@@ -27,6 +27,8 @@ fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
 			src, dst, notused);
 #endif
 
+if (notused)	fprintf(stderr, "notused %d in %s\n", notused, __func__);
+
 			/* no magic check here ? */
 if (dst->width || dst->height) {
 	fprintf(stderr, "*** %s: image at %p not empty\n", __func__, dst);
@@ -65,6 +67,8 @@ int		wd, hd;
 int		foo, x, y, x2, y2;
 float		ac;
 
+if (notused)	fprintf(stderr, "notused %d in %s\n", notused, __func__);
+
 if (dst->width || dst->height) {
 	fprintf(stderr, "*** %s: image at %p not empty\n", __func__, dst);
 	fimg_describe(dst, "destination halfsize 1");
@@ -108,7 +112,6 @@ return 0;
 /* --------------------------------------------------------------------- */
 int fimg_extractor(FloatImg *in, FloatImg *out, FimgArea51 *rect)
 {
-int		foo;
 int		xs, ys, xd, yd;
 int		count;
 float		rgb[3];
@@ -149,6 +152,8 @@ fprintf(stderr, ">>> %s ( %p %p 0x%04x )\n", __func__,
 				src, dst, notused);
 #endif
 
+if (notused)	fprintf(stderr, "notused %d in %s\n", notused, __func__);
+
 if (fimg_images_not_compatible(src, dst)) {
 	fprintf(stderr, "bad karma in %s\n", __func__);
 	return -9;
diff --git a/funcs/hsv.c b/funcs/hsv.c
index 0786858e..be0d3039 100644
--- a/funcs/hsv.c
+++ b/funcs/hsv.c
@@ -85,7 +85,7 @@ float		hh, ff, p, q, t;
 long		i;
 
 if(hsv[1] <= 0.0) {       // < is bogus, just shuts up warnings
-        rgb[0] = rgb[1] = rgb[2] = hsv[2];
+        rgb[0] = rgb[1] = rgb[2] = (hsv[2] * scale);
         return 0;
 	}
 
@@ -131,7 +131,10 @@ int fimg_essai_hsv(char *fname)
 float		colors[3], values[3], newcols[3];
 int		foo, r, g, b;
 
+fprintf(stderr, "%s NOT writing to %s\n", __func__, fname);
+
 #define INC  16
+
 for (r=0; r<255; r+=INC) {
  for (g=0; g<255; g+=INC) {
   for (b=0; b<255; b+=INC) {
diff --git a/funcs/incrustator.c b/funcs/incrustator.c
index 6a00fbf9..2ab2c83c 100644
--- a/funcs/incrustator.c
+++ b/funcs/incrustator.c
@@ -20,9 +20,10 @@ static int check_boundaries(FloatImg *from, FloatImg *to, FimgArea51 *a51)
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, from, to, a51);
+#endif
+
 fimg_printdims("from", from);
 fimg_printdims("to  ", to);
-#endif
 
 /* just a small molly-guard */
 if ( (a51->w < 0) || (a51->h < 0) ) {
@@ -30,13 +31,13 @@ if ( (a51->w < 0) || (a51->h < 0) ) {
 	abort();		/* FY Bro ! */
 	}
 
-return -1;
+return 0;
 }
 /* ---------------------------------------------------------------- */
+/* XXX
 static int move_pixels(FloatImg *from, FloatImg *to,
 				FimgArea51 *a51, int flags)
 {
-
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p %p 0x%04x )\n", __func__,
 				from, to, a51, flags);
@@ -44,6 +45,7 @@ fprintf(stderr, ">>> %s ( %p %p %p 0x%04x )\n", __func__,
 
 return -1;
 }
+*/
 /* ---------------------------------------------------------------- */
 int fimg_incrustator_0(FloatImg *psrc, FloatImg *pdst,
 				int xpos, int ypos, int flags)
@@ -58,6 +60,8 @@ fprintf(stderr, ">>> %s ( %p %p %d %d 0x%04X\n", __func__, psrc, pdst,
 							xpos, ypos, flags);
 #endif
 
+if (flags) { fprintf(stderr, "flags: 0x%04x in %s\n", flags, __func__); }
+
 if (verbosity > 1) {
 	fimg_describe(psrc, "source");
 	fimg_describe(pdst, "destination");
@@ -67,6 +71,10 @@ if (verbosity > 1) {
 area.x = xpos;		area.y = ypos;
 area.w = psrc->width;	area.h = psrc->height;
 foo = check_boundaries(psrc, pdst, &area);
+if (foo) {
+	fprintf(stderr, "Boudary error %d in %s:%d\n", foo, __func__, __LINE__);
+	return foo;
+	}
 
 if (	(xpos < 0)  || (xpos > pdst->width  - psrc->width)  ||
 	(ypos < 0)  || (ypos > pdst->height - psrc->height) ) {
diff --git a/funcs/killrgb.c b/funcs/killrgb.c
index a2b669ec..850ea740 100644
--- a/funcs/killrgb.c
+++ b/funcs/killrgb.c
@@ -20,12 +20,12 @@ int		line, col;
 int		ir;
 
 #if DEBUG_LEVEL
-fprintf(stderr, ">>> %s ( %p  %p  %d )\n", __func__,
-			  src, dst, k);
+fprintf(stderr, ">>> %s ( %p  %p  %d )\n", __func__, src, dst, k);
 #endif
 
-fimg_clear(dst);
+if (k) { fprintf(stderr, "in %s k was %d\n", __func__, k); }
 
+fimg_clear(dst);
 ir = 0;
 
 for (line=0; line<src->height; line++) {
diff --git a/funcs/misc-plots.c b/funcs/misc-plots.c
index 2c2e574d..d24a2cbd 100644
--- a/funcs/misc-plots.c
+++ b/funcs/misc-plots.c
@@ -26,6 +26,10 @@ if (fimg->type != FIMG_TYPE_RGB) {
 	return -6;
 	}
 
+if (type) {
+	fprintf(stderr, "%s : %d %f\n", __func__, type, dval);
+	}
+
 /* rampe de primaires dans le quart du haut */
 val = (float)dval;
 for (x=0; x<fimg->width; x++) {
diff --git a/funcs/pixelize.c b/funcs/pixelize.c
index fa9fc27b..2f8a5f84 100644
--- a/funcs/pixelize.c
+++ b/funcs/pixelize.c
@@ -58,8 +58,8 @@ return 0;
 /*   --------------------------------------------------------------   */
 /*
  *	un essai dans la roulotte :)
- *	11 oct 2021 : premier jet, essai concluant, mais nécessite
- *		du travail sur les rand() pour être plus 'noisy'
+ *	11 oct 2021 : premier jet, essai concluant, mais necessite
+ *		du travail sur les rand() pour etre plus 'noisy'
  *
  */
 int fimg_pixelize_h_rnd(FloatImg *psrc, FloatImg *pdst, int largeur)
@@ -68,6 +68,8 @@ static int	count = 0;
 static int	flag  = 0;
 int		foo;
 
+/* may be a mollyguard on 'largeur' parameter ? */
+
 if (0==count) {
 	if (flag) {
 		count = irand2(5, 10);
@@ -87,7 +89,7 @@ if (verbosity) {
 	fprintf(stderr, "%s: count=%d flag=%d\n", __func__, count, flag);
 	}
 
-foo = fimg_pixelize_h_0(psrc, pdst, flag ? 8 : 32);
+foo = fimg_pixelize_h_0(psrc, pdst, flag ? largeur : 32);
 if (foo) {
 	fprintf(stderr, "PANIC in %s\n", __func__);
 	abort();
@@ -97,6 +99,4 @@ count--;		/* nice trick bro */
 
 return 0;
 }
-
-
 /*   --------------------------------------------------------------   */
diff --git a/funcs/plasmas.c b/funcs/plasmas.c
index 591865b2..38aa3384 100644
--- a/funcs/plasmas.c
+++ b/funcs/plasmas.c
@@ -31,13 +31,11 @@ for (y=0; y<img->height; y++) {
 	for (x=0; x<img->width; x++) {
 		dx = ((double)x/(double)img->width) - 0.5000;
 
-		rgb[0] = sin(dx*10 + time) + 1.0;
-		rgb[1] = sin(dx*12 + time) + 1.0;
-		rgb[2] = sin(dx*14 + time) + 1.0;
+		rgb[0] = sin(dx*10 + time + dy) + 1.0;
+		rgb[1] = sin(dx*12 + time + dy) + 1.0;
+		rgb[2] = sin(dx*14 + time + dy) + 1.0;
 		fimg_put_rgb(img, x, y, rgb);
-
 		}
-
 	}
 
 return 0;
diff --git a/funcs/qsortrgb.c b/funcs/qsortrgb.c
index b1c58aaf..43792e48 100644
--- a/funcs/qsortrgb.c
+++ b/funcs/qsortrgb.c
@@ -28,6 +28,8 @@ int		foo, szimg;
 fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, psrc, pdst, notused);
 #endif
 
+if (notused) { fprintf(stderr, "%s notused != 0, WTF ?\n", __func__); }
+
 if (FIMG_TYPE_RGB != psrc->type) {
 	fprintf(stderr, "%s: bad src type %d\n", __func__, psrc->type);
 	return -7;
@@ -78,6 +80,8 @@ float		rgb[3];
 fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, psrc, pdst, notused);
 #endif
 
+if (notused) { fprintf(stderr, "%s notused != 0, WTF ?\n", __func__); }
+
 if (FIMG_TYPE_RGB != psrc->type) {
 	fprintf(stderr, "%s: bad src type %d\n", __func__, psrc->type);
 	return -7;
diff --git a/funcs/rotate.c b/funcs/rotate.c
index 9fbdd942..fd980599 100644
--- a/funcs/rotate.c
+++ b/funcs/rotate.c
@@ -25,6 +25,8 @@ fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__,
 				src, dst, notused);
 #endif
 
+if (notused)	fprintf(stderr, "notused %d in %s\n", notused, __func__);
+
 if (src->type != FIMG_TYPE_RGB) {
 	fprintf(stderr, "%s: src type %d not valid\n", __func__,
 					src->type);
diff --git a/funcs/sfx0.c b/funcs/sfx0.c
index fa2fce16..bf96c798 100644
--- a/funcs/sfx0.c
+++ b/funcs/sfx0.c
@@ -26,7 +26,7 @@ if (FIMG_TYPE_RGB != fimg->type) {
 
 nbpix = fimg->width * fimg->height;
 for (foo=0; foo<nbpix; foo++) {
-	if (fimg->R[foo] > fimg->G[foo])
+	if ((fimg->R[foo]+fval) > fimg->G[foo])
 		fimg->B[foo] = fimg->R[foo];
 	else
 		fimg->B[foo] = fimg->G[foo];
@@ -50,7 +50,7 @@ if (FIMG_TYPE_RGB != fimg->type) {
 
 nbpix = fimg->width * fimg->height;
 for (foo=0; foo<nbpix; foo++) {
-	if (fimg->R[foo] > fimg->B[foo])
+	if ((fimg->R[foo]+fval) > fimg->B[foo])
 		fimg->G[foo] = fimg->R[foo];
 	else
 		fimg->G[foo] = fimg->B[foo];
diff --git a/funcs/sfx2.c b/funcs/sfx2.c
index 888c08f0..cba02349 100644
--- a/funcs/sfx2.c
+++ b/funcs/sfx2.c
@@ -25,6 +25,11 @@ int		foo, size;
 fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, notused);
 #endif
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 foo = fimg_get_minmax_rgb(pimg, mm);
 mR = (mm[1] - mm[0]) / 2.0;
 mG = (mm[3] - mm[2]) / 2.0;
@@ -54,6 +59,11 @@ float		mm[6], mRa, mGa, mBa, mRb, mGb, mBb;
 float		*fptr;
 int		foo, size;
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %d )\n", __func__, pimg, notused);
 #endif
diff --git a/funcs/sfx3.c b/funcs/sfx3.c
index 4442a6bb..c21e5428 100644
--- a/funcs/sfx3.c
+++ b/funcs/sfx3.c
@@ -28,9 +28,15 @@ fprintf(stderr, ">>> %s ( %p %p %f 0x%04x )\n", __func__,
 				src, dst, kval, notused);
 #endif
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 halfval = fimg_get_maxvalue(src) / 2.0;
 if (verbosity > 1) {
-	fprintf(stderr, "%s: halfval=%f\n", __func__, halfval);
+	fprintf(stderr, "%s: kval=%f & halfval=%f\n", __func__,
+				kval,	halfval);
 	}
 
 for (y=0; y<src->height; y++) {
diff --git a/funcs/sfx4.c b/funcs/sfx4.c
index 9c163162..5b14e3b1 100644
--- a/funcs/sfx4.c
+++ b/funcs/sfx4.c
@@ -25,6 +25,11 @@ float		in[3], out[3];
 fprintf(stderr, ">>> %s ( %p %p 0x%04x )\n", __func__, src, dst, notused);
 #endif
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 for (y=0; y<src->height; y++) {
 	for (x=0; x<src->width; x++) {
 		foo =  fimg_get_rgb(src, x, y, in);
@@ -48,13 +53,18 @@ return 0;
 int fimg_split_level(FloatImg *src, FloatImg *dst, int notused)
 {
 float		means[4];
-float		in[3];
+// float		in[3];
 int		foo, idx, surface;
 
 #if DEBUG_LEVEL
 fprintf(stderr, ">>> %s ( %p %p 0x%04x )\n", __func__, src, dst, notused);
 #endif
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 foo = fimg_meanvalues(src, means);
 if (foo) {
 	return -66;
diff --git a/funcs/tests.c b/funcs/tests.c
index 3d484689..87b04cf8 100644
--- a/funcs/tests.c
+++ b/funcs/tests.c
@@ -30,12 +30,14 @@ fprintf(stderr, "\nEssais fausses couleurs (type %d) -> '%s'\n", type, dstfile);
 
 foo = fimg_create(&src, W, H, FIMG_TYPE_RGB);
 foo = fimg_hdeg_a(&src, 12e3);
+// fimg_export_picture(&src, "debug.pnm", 0);
 foo = fimg_clone(&src, &dst, 0);
 foo = fimg_clear(&dst);
 
 foo = fimg_falsecolors_0(&src, &dst, type, 3.141592654);
+fprintf(stderr, "false colors 0 --> %d\n", foo);
 
-foo= fimg_export_picture(&dst, dstfile, 0);
+foo = fimg_export_picture(&dst, dstfile, 0);
 return -1;
 }
 /* --------------------------------------------------------------------- */
diff --git a/funcs/utils.c b/funcs/utils.c
index 6ba0e81e..6a3e8d0f 100644
--- a/funcs/utils.c
+++ b/funcs/utils.c
@@ -120,6 +120,11 @@ int parse_rectangle(char *str, FimgArea51 *r, int notused)
 {
 int		x, y, w, h, foo;
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 if (verbosity)
 	fprintf(stderr, "parsing %s\n", str);
 
diff --git a/lib/fimg-2gray.c b/lib/fimg-2gray.c
index c06c96e0..948d3d0e 100644
--- a/lib/fimg-2gray.c
+++ b/lib/fimg-2gray.c
@@ -21,7 +21,15 @@ int fimg_mk_gray_from(FloatImg *src, FloatImg *dst, int k)
 float		kr, kg, kb, kdiv;
 int		nbb, foo;
 
-kr = kg = kb = 1.0;		/* canonic random values */
+if (k)	{
+	/* some random funky values ...  */
+	kr = 0.789;	kg = 0.523;	kb = 0.349;
+	}
+else	{
+	/* ... and canonic random values */
+	kr = kg = kb = 1.0;
+	}
+
 kdiv = kr + kg + kb;
 
 /* we must check the validity of our parameters */
@@ -59,6 +67,10 @@ int fimg_desaturate(FloatImg *src, FloatImg *dst, int notused)
 int		foo, nbb;
 
 /* we must check the validity of our parameters */
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
 if (FIMG_TYPE_RGB != src->type || FIMG_TYPE_RGB != dst->type) {
 	fprintf(stderr, "%s : bad image type\n", __func__);
 	return -18;
diff --git a/lib/fimg-file.c b/lib/fimg-file.c
index 11d88c2d..4c82ffd8 100644
--- a/lib/fimg-file.c
+++ b/lib/fimg-file.c
@@ -94,8 +94,8 @@ if (NULL == pmd) {
 	}
 else	{
 	/* OK, get some funky metadatas */
-	fprintf(stderr, "OK %s get funky metadatas\n", __func__);
-	fprintf(stderr, "acquisition values %f %d\n", pmd->fval, pmd->count);
+	// fprintf(stderr, "%s get metadatas\n", __func__);
+	fprintf(stderr, "acqu fval=%f count=%d\n", pmd->fval, pmd->count);
 	}
 
 fp = fopen(fname, "w");
@@ -111,7 +111,7 @@ filehead.t = fimg->type;
 
 /* XXX     metadata */
 if (NULL != pmd) {
-	fprintf(stderr, "ok, %s give an 'a' flag\n", __func__);
+	// fprintf(stderr, "ok, %s give an 'a' flag\n", __func__);
 	filehead.magic[4] = 'a';
 	}
 
@@ -125,7 +125,7 @@ if (1 != foo) {
 
 /* we have metadata, put them on tape */
 if (NULL != pmd) {
-	fprintf(stderr, ">>> %s write metadata %p\n", __func__, pmd);
+	// fprintf(stderr, ">>> %s write metadata %p\n", __func__, pmd);
 	foo = fwrite(pmd, sizeof(FimgMetaData), 1, fp);
 	if (1 != foo) {
 		perror(fname);
@@ -296,7 +296,7 @@ fprintf(stderr, ">>> %-25s ( '%s' %p )\n", __func__, fname, head);
 
 /*
  *	may be we can crash coredump here if the head
- *	descriptor from calleris not blank ?
+ *	descriptor from caller is not blank ?
  */
 
 fp = fopen(fname, "r");
@@ -328,7 +328,8 @@ if (foo) {
  *	Oh boy, we have to skeep the metadata chunck
  */
 if ('a' == filehead.magic[4])	{
-	fprintf(stderr, "OMG %s metadata !!!\n", __func__);
+	if (verbosity)
+		{ fprintf(stderr, "%s: %s has metadata\n", __func__, fname); }
 	foo = fseek(fp, (long)sizeof(FimgMetaData), SEEK_CUR);
 	if (foo) {
 		fprintf(stderr, "%s : shit hit the fan\n", __func__);
diff --git a/lib/fimg-math.c b/lib/fimg-math.c
index 365165ba..1e24d53d 100644
--- a/lib/fimg-math.c
+++ b/lib/fimg-math.c
@@ -303,6 +303,11 @@ int fimg_ajust_from_grab(FloatImg *fi, double maxima, int notused)
 {
 double		coef;
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 if (fi->type != FIMG_TYPE_RGB) {
 	fprintf(stderr, "%s : type %d invalide\n",
 				__func__, fi->type);
@@ -324,6 +329,7 @@ if (verbosity) {
 	fprintf(stderr, "image @    %p\n", fi);
 	fprintf(stderr, "fval       %f\n", fi->fval);
 	fprintf(stderr, "count      %d\n", fi->count);
+	fprintf(stderr, "maxima     %f\n", maxima);
 	fprintf(stderr, "coef       %f\n", coef);
 	}
 
diff --git a/lib/fimg-pnm.c b/lib/fimg-pnm.c
index c49357ef..9b235f34 100644
--- a/lib/fimg-pnm.c
+++ b/lib/fimg-pnm.c
@@ -23,9 +23,14 @@ int fimg_load_from_pnm(char *fname, FloatImg *head, int notused)
 FILE		*fp;
 int		width, height, maxval;
 int		foo, line, column;
-unsigned char	*buffline, *idxrd, dummychar;
+unsigned char	*buffline, *idxrd;
 float		*Rptr, *Gptr, *Bptr;
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
+
 if (NULL==head) {
 	fprintf(stderr, "%s : head ptr is %p\n", __func__, head);
 	return -8;
@@ -58,6 +63,7 @@ if (foo) {
         }
 
 #if DEBUG_LEVEL
+unsigned char dummychar;
 fread(&dummychar, 1, 1, fp);
 fprintf(stderr, "%s : dummychar %xx\n", __func__, dummychar);
 #else
diff --git a/lib/fimg-timers.c b/lib/fimg-timers.c
index bae0721f..ec979f09 100644
--- a/lib/fimg-timers.c
+++ b/lib/fimg-timers.c
@@ -24,6 +24,8 @@ double fimg_timer_set(int whot)
 {
 double		current;
 
+if (whot) fprintf(stderr, "in %s whot is %d\n", __func__, whot);
+
 current = dtime();
 
 #if DEBUG_LEVEL
@@ -36,6 +38,9 @@ return memory_time;
 double fimg_timer_get(int whot)
 {
 double		current;
+
+if (whot) fprintf(stderr, "in %s whot is %d\n", __func__, whot);
+
 current = dtime();
 return current - memory_time;
 }
diff --git a/lib/metadata.c b/lib/metadata.c
index deb33b34..d3e0c738 100644
--- a/lib/metadata.c
+++ b/lib/metadata.c
@@ -6,6 +6,7 @@
 #include  <stdlib.h>
 #include  <stdint.h>
 #include  <unistd.h>
+#include  <time.h>
 #include	<sys/time.h>
 #include  <string.h>
 
@@ -14,6 +15,9 @@
 extern int verbosity;           /* must be declared around main() */
 
 /* ---------------------------------------------------------------- */
+/*
+ *	specific function because magic field is NOT an asciiz !
+ */
 static void puts_magic_8(char *ptr, FILE *fp)
 {
 int		foo;
@@ -37,10 +41,13 @@ fprintf(stderr, ">>> %s ( %p '%s' 0x%08x )\n", __func__,
 				pmd, title, notused);
 #endif
 
+if (notused) {
+	fprintf(stderr, "notused was %d, must be 0 in %s\n",
+				notused, 		__func__);
+	}
 if (NULL != title) {
 	fprintf(stderr, "==== metadate for %s\n", title);
 	}
-
 if (verbosity) {
 	fprintf(stderr, "sizeof(metadata)     = %ld\n",    \
 				sizeof(FimgMetaData));
@@ -49,9 +56,10 @@ if (verbosity) {
 
 /* SHOW TIMESTAMP HERE */
 fprintf(stderr, "seconds sc. epoch    = %ld\n", pmd->timestamp.tv_sec);
+fprintf(stderr, "date & time          = %s",   ctime(&pmd->timestamp.tv_sec));
 doubletime = (double)pmd->timestamp.tv_sec +			\
 		(double)pmd->timestamp.tv_usec / 1e6;
-fprintf(stderr, "dtime of day         = %e\n", doubletime);
+fprintf(stderr, "dtime of day         = %12.3f\n", doubletime);
 fprintf(stderr, "creator pid          = %ld\n", pmd->cpid);
 fprintf(stderr, "float value          = %.3f\n", pmd->fval);
 fprintf(stderr, "counter              = %d\n", pmd->count);
@@ -85,8 +93,8 @@ if (foo) {
 	}
 else	{
 	if (verbosity > 1) {
-		fprintf(stderr, "  set TimeOfDay to %12ld , %8ld\n", \
-					tvl.tv_sec, tvl.tv_usec);
+		fprintf(stderr, "%s : set TimeOfDay to  %12ld %8ld\n", \
+					__func__, tvl.tv_sec, tvl.tv_usec);
 		}
 	memcpy(&(pmd->timestamp), &tvl, sizeof(struct timeval));
 	}
diff --git a/lib/t.c b/lib/t.c
index 4fca4fbe..6a4b8625 100644
--- a/lib/t.c
+++ b/lib/t.c
@@ -22,7 +22,7 @@ int			foo;
 
 fprintf(stderr, "-------- %s ( %s ) --------\n", __func__, fname);
 
-foo = fimg_default_metadata(&Md);
+foo = fimg_default_metadata(&Md, 0);
 
 // foo = fimg_show_metadata(&Md, "default from t.c", 0);
 
@@ -33,8 +33,11 @@ if (foo) {
 	}
 
 foo = fimg_show_metadata(&Md, fname, 0);
-
-return -1;
+if (foo) {
+	fprintf(stderr, "%s: show metadata -> %d\n", __func__, foo);
+	return foo;
+	}
+return 0;
 }
 /* ---------------------------------------------------------------- */
 int essai_save_plane(int wot)
@@ -100,7 +103,8 @@ if (foo) {
 	fprintf(stderr, "%s err create A %d\n", __func__, foo);
 	return foo;
 	}
-fimg_hdeg_a(&A, KDEG);
+if (k)	fimg_hdeg_a(&A, KDEG);
+else	fimg_vdeg_a(&A, KDEG);
 
 foo = fimg_create(&B, WI, HI, FIMG_TYPE_RGB);
 if (foo) {
@@ -297,6 +301,12 @@ fimg_save_as_pnm(&copy, "cos_010.pnm", 0);
 fimg_destroy(&dessin);		fimg_destroy(&copy);
 
 return 0;
+}
+/* ---------------------------------------------------------------- */
+void help_me_obiwan(void)
+{
+
+
 }
 /* ---------------------------------------------------------------- */
 int main(int argc, char *argv[])
@@ -305,9 +315,10 @@ int		foo, opt;
 // char		outname[100];
 int		gray = 0;
 
-while ((opt = getopt(argc, argv, "gn:v")) != -1) {
+while ((opt = getopt(argc, argv, "ghn:v")) != -1) {
 	switch(opt) {
 		case 'g':	gray++;			break;
+		case 'h':	help_me_obiwan();	break;
 		case 'n':	foo=atoi(optarg);	break;
 		case 'v':	verbosity++;		break;
 		default:
diff --git a/tools/addpnm2fimg.c b/tools/addpnm2fimg.c
index f06b23b8..cf700205 100644
--- a/tools/addpnm2fimg.c
+++ b/tools/addpnm2fimg.c
@@ -21,6 +21,11 @@ int		foo, x, y, idx;
 fprintf(stderr, ">>> %s ( '%s' %s' )\n", __func__, srcname, dstname);
 #endif
 
+if (notused) {
+	fprintf(stderr, "in %s, notused must be 0, was %d !\n", 
+			    __func__,			notused);
+	}
+
 foo = fimg_create_from_dump(dstname, &dst);
 if (foo) fprintf(stderr, "create dst fimg from '%s' -> %d\n", dstname, foo);
 #if DEBUG_LEVEL
diff --git a/tools/cumulfimgs.c b/tools/cumulfimgs.c
index 8304cfa1..bd086a1e 100644
--- a/tools/cumulfimgs.c
+++ b/tools/cumulfimgs.c
@@ -43,7 +43,7 @@ puts("\t-v\tincrease verbosity");
 puts("\t-o\tname of output file");
 puts("\t-g\tconvert to gray level");
 puts("");
-if (verbosity) { puts("Xperiment"); fimg_print_version(1); }
+if (verbosity) { puts("Xperiment"); fimg_print_version(v); }
 exit(0);
 }
 /* --------------------------------------------------------------------- */
@@ -65,7 +65,7 @@ g_width = g_height = 0;
 while ((opt = getopt(argc, argv, "gho:vx")) != -1) {
 	switch(opt) {
 		case 'g':	to_gray = 1;			break;
-		case 'h':	help(0);			break;
+		case 'h':	help(1);			break;
 		case 'o':	output_file = optarg;		break;
 		case 'v':	verbosity++;			break;
 		case 'x':	experiment++;			break;
diff --git a/tools/fimg2fits.c b/tools/fimg2fits.c
index 272d4f78..1f2a026a 100644
--- a/tools/fimg2fits.c
+++ b/tools/fimg2fits.c
@@ -39,12 +39,13 @@ static void help(int k)
 {
 puts("export to FITS format");
 puts("\t-p  select colorplane : R, G, B");
+fimg_print_version(k);
 }
 /* ----------------------------------------------------------------- */
 
 int main(int argc, char *argv[])
 {
-int		foo, opt;
+int		opt;
 int		plane = '?';
 
 while ((opt = getopt(argc, argv, "p:hv")) != -1) {
diff --git a/tools/fimg2png.c b/tools/fimg2png.c
index 00fc0864..5144416f 100644
--- a/tools/fimg2png.c
+++ b/tools/fimg2png.c
@@ -64,7 +64,7 @@ puts("usage:\n\tfimg2png [options] foo.fimg bar.png");
 puts("options:");
 puts("\t-g\tconvert to gray");
 puts("\t-v\tincrease verbosity");
-if (verbosity) fimg_print_version(1);
+if (verbosity) fimg_print_version(k);
 
 exit(0);
 }
diff --git a/tools/fimg2text.c b/tools/fimg2text.c
index b1141ce9..5f3b7f0e 100644
--- a/tools/fimg2text.c
+++ b/tools/fimg2text.c
@@ -25,6 +25,10 @@ fprintf(stderr, ">>> %25s ( %p '%s' %d )\n", __func__,
 			src, fname, flags);
 #endif
 
+if (0 != flags) {
+	fprintf(stderr, "bad flags in %s\n", __func__);
+	}
+
 fp = NULL;					/* molly guard */
 if (strcmp("-", fname)) {			/* real file */
 	fprintf(stderr, "real file '%s'\n", fname);
@@ -142,7 +146,7 @@ puts("\t-n 3.14\t\tnormalize picture");
 puts("\t-s N\t\tsteps on x & y");
 if (verbosity) {
 	printf("*** compiled: %s at %s\n", __DATE__, __TIME__);
-	fimg_print_version(1);
+	fimg_print_version(k);
 	}
 exit(0);
 }
@@ -153,11 +157,11 @@ int main(int argc, char *argv[])
 int		foo, opt;
 int		steps = 1;
 float		norm_val = 222.0;	/* < 0 : don't normalize */
-char		separator = ' ';
+// char		separator = ' ';
 
 while ((opt = getopt(argc, argv, "f:hn:s:v")) != -1) {
 	switch(opt) {
-		case 'f':	separator = optarg[0];		break;
+		// case 'f':	separator = optarg[0];		break;
 		case 'v':	verbosity++;			break;
 		case 'h':	help(1);			exit(1);
 		case 's':	steps = atoi(optarg);		break;
diff --git a/tools/fimg2tiff.c b/tools/fimg2tiff.c
index 9c332f9b..a78448d9 100644
--- a/tools/fimg2tiff.c
+++ b/tools/fimg2tiff.c
@@ -65,7 +65,7 @@ puts("usage:\n\tfimg2tiff [options] foo.fimg bar.tiff");
 puts("options:");
 // puts("\t-g\tconvert to gray");
 puts("\t-v\tincrease verbosity");
-if (verbosity) fimg_print_version(1);
+if (verbosity) fimg_print_version(k);
 
 exit(0);
 }
diff --git a/tools/fimgfx.c b/tools/fimgfx.c
index f7bac3e9..372dbe69 100644
--- a/tools/fimgfx.c
+++ b/tools/fimgfx.c
@@ -28,7 +28,7 @@ enum fxid { Fx_cos01=5, Fx_cos010, Fx_pow2, Fx_sqrt, Fx_gray0, Fx_halfsz0,
 		Fx_rot90, Fx_cmixa, Fx_desat, Fx_ctr2x2, Fx_norm,
 		Fx_classtrial, Fx_mirror, Fx_shift0, Fx_trimul,
 		Fx_xper, Fx_binarize, Fx_trinarize, Fx_hilight_R,
-		Fx_absolute, Fx_clamp, Fx_shiftZ };
+		Fx_absolute, Fx_clamp, Fx_fakol0 };
 
 Fx fx_list[] = {
 	{ "cos01",		Fx_cos01,	0,	1 },
@@ -52,7 +52,7 @@ Fx fx_list[] = {
 	{ "hilightr",		Fx_hilight_R,	0,	1 },
 	{ "abs",		Fx_absolute,	0,	1 },
 	{ "clamp",		Fx_clamp,	0,	1 },
-	{ "shiftzero",		Fx_shiftZ,	0,	1 },
+	{ "fakol0",		Fx_fakol0,	0,	1 },
 	{ NULL,			0,		0,	0 }
 	};
 
@@ -171,7 +171,7 @@ else	{
 
 action = fx_list[fxidx].id;
 
-if (verbosity) {
+if (verbosity > 1) {
 	fprintf(stderr, "%s:  fxidx=%d  action=%d\n", __func__,
 				fxidx, action);
 	}
@@ -189,7 +189,6 @@ switch (action) {
 	case Fx_gray0:		/* new 2020 01 10 */
 		fimg_to_gray(&src); fimg_copy_data(&src, &dest);
 								break;
-
 	case Fx_xper:
 		do_experiment(&src, &dest, maxval);		break;
 		
@@ -210,7 +209,6 @@ switch (action) {
 						global_fvalue);
 		foo = fimg_classif_trial(&src, &dest, global_fvalue, 0);
 								break;
-
 	case Fx_desat:
 		fimg_copy_data(&src, &dest);
 		foo = fimg_mix_rgb_gray(&dest, global_fvalue);
@@ -221,9 +219,12 @@ switch (action) {
 	case Fx_shift0:
 		// fprintf(stderr, "Krkrk %d\n", action);
 		foo = fimg_auto_shift_to_zero(&src, &dest);
+		if (foo) {
+			fprintf(stderr, "*** shiftzero -> %d\n", foo);
+			}
 								break;
 	case Fx_trimul:
-		fprintf(stderr, "trimul %d\n", action);
+		// fprintf(stderr, "trimul %d\n", action);
 		foo = fimg_sfx_triplemul(&src, &dest, 0);
 								break;
 	case Fx_ctr2x2:
@@ -253,12 +254,12 @@ switch (action) {
 		if (foo > 0)	foo = 0;
 								break;
 
-	case Fx_shiftZ:
-		foo = fimg_auto_shift_to_zero(&src, &dest);
-		if (foo) {
-			fprintf(stderr, "*** shiftzero -> %d\n", foo);
-			}
-								break;
+	case Fx_fakol0:
+			/***********************/
+			/* DO SOMETHING HERE ! */
+			/***********************/
+		foo = fimg_falsecolors_0(&src, &dest, 0, 1.0);
+		break;
 
 	default:
 		fprintf(stderr, "%s %s : %d is bad action\n",
diff --git a/tools/fimghalfsize.c b/tools/fimghalfsize.c
index 9cceca36..8af2e14e 100644
--- a/tools/fimghalfsize.c
+++ b/tools/fimghalfsize.c
@@ -52,6 +52,7 @@ void help(int u)
 puts("Usage:\n\tfimghalfsize [options]  in.fimg out.fimg");
 puts("Options:");
 puts("\t-g\tconvert output to gray");
+fimg_print_version(u);
 exit(0);
 }
 /* ------------------------------------------------------------- */
diff --git a/tools/fimgmetadata.c b/tools/fimgmetadata.c
index 29efcb04..09f86ba1 100644
--- a/tools/fimgmetadata.c
+++ b/tools/fimgmetadata.c
@@ -11,10 +11,11 @@
 
 #include  "../floatimg.h"
 
-int		verbosity;
 
 /* --------------------------------------------------------------------- */
-enum comId {	C_timestamp, C_count, C_fval, C_cpid, C_origin, 
+int		verbosity;
+
+enum comId {	C_timestamp, C_daytime, C_count, C_fval, C_cpid, C_origin, 
 		C_idcam, C_all };
 
 typedef struct {
@@ -24,6 +25,7 @@ typedef struct {
 
 Cmd Cmd_list[] = {
 	{ "timestamp",		C_timestamp	},
+	{ "daytime",		C_daytime	},
 	{ "cpid",		C_cpid		},
 	{ "count",		C_count		},
 	{ "fval",		C_fval		},
@@ -73,7 +75,9 @@ action = lookup_cmd(command);
 
 switch(action)	{
 	case C_timestamp:
-		printf("timestamp %ld\n", metadata.timestamp.tv_sec); break;
+		printf("timestamp %ld\n", metadata.timestamp.tv_sec);  break;
+	case C_daytime:
+		printf("%s\n", ctime(&metadata.timestamp.tv_sec));    break;
 	case C_count:
 		printf("count %d\n", metadata.count);		break;
 	case C_fval:
@@ -87,7 +91,7 @@ switch(action)	{
 	case C_all:
 		fimg_show_metadata(&metadata, fname, 0);	break;
 	default:
-		fprintf(stderr, "WTF?\n");			exit(1);
+		fprintf(stderr, "%s WTF?\n", __func__);		exit(1);
 	}
 
 return 0;
@@ -104,7 +108,6 @@ exit(0);
 int main(int argc, char *argv[])
 {
 int		foo, opt, nbargs;
-char		*fname;
 
 while ((opt = getopt(argc, argv, "hv")) != -1) {
 	switch(opt) {
diff --git a/tools/fimgops.c b/tools/fimgops.c
index c990c902..b18d6c81 100644
--- a/tools/fimgops.c
+++ b/tools/fimgops.c
@@ -70,7 +70,7 @@ puts("options:");
 printf("\t-k N.N\t\tset float value (def=%.3f)\n", global_fvalue);
 puts("\t-v\t\tincrease verbosity");
 pr_opcodes();
-if (verbosity) fimg_print_version(1);
+if (verbosity) fimg_print_version(lj);
 exit(0);
 }
 /* --------------------------------------------------------------------- */
diff --git a/v4l2/grabvidseq.c b/v4l2/grabvidseq.c
index b5d44763..d23a0422 100644
--- a/v4l2/grabvidseq.c
+++ b/v4l2/grabvidseq.c
@@ -325,12 +325,11 @@ for (i = 0; i < nbre_capt; i++) {
 			out_name);
 #endif
 
-	if (nbre_capt > 1 && period > 0.001) {
+	if (nbre_capt > 1 && period > 0.0001) {
 		/* suspend execution for
 		   microsecond intervals */
 		usleep((int)(period*1E6));
 		}
-
 	xioctl(fd, VIDIOC_QBUF, &buf);
 	}
 
@@ -378,6 +377,10 @@ switch (contrast) {
 		break;
 	}
 
+/* XXX for the debug of metadata thing */
+// fprintf(stderr, "after grab & contrast: fval %f count %d\n",
+//					cumul.fval, cumul.count);
+
 /* XXX warning, new from coronahome 26 mars 2020 */
 to_save = &cumul;
 if (90 == rotfactor) {
@@ -388,17 +391,23 @@ if (90 == rotfactor) {
 		foo = fimg_save_as_png(&tmpfimg, "rot90.png", 0);
 		}
 	to_save = &tmpfimg;
+	/*
+	 *      CRITICAL : we have to restore those values !
+	 */
+	to_save->fval  = cumul.fval;
+	to_save->count = cumul.count;
 	}
 
 foo = format_from_extension(outfile);
 switch (foo) {
 	case FILE_TYPE_FIMG:
-		fimg_default_metadata(&metadata, 51);
-		/* copy some values to mdstruct */
-		metadata.fval  = to_save->fval;
-		metadata.count = to_save->count;
 		if (add_metadata) {
-			fprintf(stderr, ">>> save %s with md\n", outfile);
+			fimg_default_metadata(&metadata, 51);
+			/* copy some values to mdstruct */
+			metadata.fval  = to_save->fval;
+			metadata.count = to_save->count;
+			// fprintf(stderr, "-> save '%s' with metadata\n",
+			//			outfile);
 			foo = fimg_dumpmd_to_file(to_save, outfile,	\
 							&metadata, 0);
 			}