diff --git a/floatimg.h b/floatimg.h
index 0a697375..05c934f3 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -3,7 +3,7 @@
  *			ugly code from tTh
  */
 
-#define		FIMG_VERSION	120
+#define		FIMG_VERSION	122
 
 /*
  *	in memory descriptor
diff --git a/funcs/contour2x2.c b/funcs/contour2x2.c
index 87c42359..da6d824b 100644
--- a/funcs/contour2x2.c
+++ b/funcs/contour2x2.c
@@ -49,8 +49,12 @@ else	{
 	}
 
 foo = fimg_meanvalues(psrc, avg);
+if (foo) {
+	fprintf(stderr, "%s: err %d on fimg_meanvalues\n", __func__, foo);
+	return foo;
+	}
 if (verbosity > 1) {
-	fprintf(stderr, "mean values : %f %f %f\n", avg[0], avg[1], avg[2]);
+	fprintf(stderr, "%s: %f %f %f\n", __func__, avg[0], avg[1], avg[2]);
 	}
 
 #define RP(ix, iy)   ( psrc->R[((iy)*psrc->width)+(ix)] < avg[0] )
diff --git a/funcs/qsortrgb.c b/funcs/qsortrgb.c
index 233cde48..c561a5ad 100644
--- a/funcs/qsortrgb.c
+++ b/funcs/qsortrgb.c
@@ -38,6 +38,10 @@ if (fimg_images_not_compatible(psrc, pdst)) {
 
 if (psrc != pdst) {		/* optimize or futurbug ? */
 	foo = fimg_copy_data(psrc, pdst);
+	if (foo) {
+		fprintf(stderr, "%s: err %d on copy data\n", __func__, foo);
+		return foo;
+		}
 	}
 
 szimg = pdst->width * pdst->height;
diff --git a/funcs/rotate.c b/funcs/rotate.c
index 1262965c..77b4816a 100644
--- a/funcs/rotate.c
+++ b/funcs/rotate.c
@@ -15,7 +15,7 @@ extern int		verbosity;
 int fimg_rotate_90(FloatImg *src, FloatImg *dst, int notused)
 {
 int			foo;
-int			x, y, j, k;
+int			x, y, k;
 float			rgb[3];
 
 #if DEBUG_LEVEL
@@ -56,7 +56,7 @@ if ( (src->type != dst->type)    ||
 for (y=0; y<src->height; y++) {
 	for (x=0; x<src->width; x++) {
 		fimg_get_rgb(src, x, y, rgb);
-		j = (dst->height - x) - 1;
+		// XXX ??? j = (dst->height - x) - 1;
 		k = (dst->width  - y) - 1;
 #if DEBUG_LEVEL > 1
 		fprintf(stderr, "%6d %6d\n", k, j);
diff --git a/lib/Makefile b/lib/Makefile
index 0f3dfeac..25170ce7 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -2,7 +2,7 @@
 #	building the base library
 #
 
-COPT = -Wall -fpic -g   -no-pie -DDEBUG_LEVEL=0
+COPT = -Wall -fpic -g   -no-pie -DDEBUG_LEVEL=1
 
 OBJS = fimg-core.o fimg-pnm.o fimg-file.o fimg-math.o	\
 	fimg-timers.o operators.o fimg-2gray.o		\
diff --git a/lib/contrast.c b/lib/contrast.c
index 567fd362..47e387e9 100644
--- a/lib/contrast.c
+++ b/lib/contrast.c
@@ -51,11 +51,15 @@ else	{
 	}
 
 
-nbre = s->width * s->height * 3;
+nbre = s->width * s->height;
 
 for (idx=0; idx<nbre; idx++) {
 	dval = s->R[idx] / maxval;
 	d->R[idx] = maxval * sqrt(dval);
+	dval = s->G[idx] / maxval;
+	d->G[idx] = maxval * sqrt(dval);
+	dval = s->B[idx] / maxval;
+	d->B[idx] = maxval * sqrt(dval);
 	}
 
 return -1;
@@ -67,7 +71,7 @@ int		nbre, idx;
 double		dval;
 
 if (s->type != FIMG_TYPE_RGB) {
-	fprintf(stderr, "%s : src type %d invalide\n",
+	fprintf(stderr, "%s: src type %d invalide\n",
 				__func__, s->type);
 	return -4;
 	}
@@ -77,18 +81,22 @@ if (NULL==d) {
 	}
 else	{
 	if (d->type != FIMG_TYPE_RGB) {
-		fprintf(stderr, "%s : dst type %d invalide\n",
+		fprintf(stderr, "%s: dst type %d invalide\n",
 					__func__, d->type);
 		return -4;
 		}
 	}
 
 
-nbre = s->width * s->height * 3;
+nbre = s->width * s->height;
 
 for (idx=0; idx<nbre; idx++) {
 	dval = s->R[idx] / maxval;
 	d->R[idx] = maxval * dval * dval;
+	dval = s->G[idx] / maxval;
+	d->G[idx] = maxval * dval * dval;
+	dval = s->B[idx] / maxval;
+	d->B[idx] = maxval * dval * dval;
 	}
 
 return 0;
@@ -122,12 +130,15 @@ else	{
 		}
 	}
 
-nbre = s->width * s->height * 3;
+nbre = s->width * s->height;
 
 for (idx=0; idx<nbre; idx++) {
 	dval = s->R[idx] / maxval;
-
 	d->R[idx] = maxval * (0.5 - 0.5 * cos(3.141592654*dval));
+	dval = s->G[idx] / maxval;
+	d->G[idx] = maxval * (0.5 - 0.5 * cos(3.141592654*dval));
+	dval = s->B[idx] / maxval;
+	d->B[idx] = maxval * (0.5 - 0.5 * cos(3.141592654*dval));
 	}
 
 return 0;
@@ -155,12 +166,15 @@ else	{
 		}
 	}
 
-nbre = s->width * s->height * 3;
+nbre = s->width * s->height;
 
 for (idx=0; idx<nbre; idx++) {
 	dval = s->R[idx] / maxval;
-
 	d->R[idx] = maxval * (0.5 - 0.5 * cos(2*3.141592654*dval));
+	dval = s->G[idx] / maxval;
+	d->G[idx] = maxval * (0.5 - 0.5 * cos(2*3.141592654*dval));
+	dval = s->B[idx] / maxval;
+	d->B[idx] = maxval * (0.5 - 0.5 * cos(2*3.141592654*dval));
 	}
 
 return 0;
diff --git a/lib/fimg-core.c b/lib/fimg-core.c
index a8b606cf..5ceaae2b 100644
--- a/lib/fimg-core.c
+++ b/lib/fimg-core.c
@@ -19,7 +19,8 @@ int fimg_type_is_valid(int type)
 switch (type) {
  	case FIMG_TYPE_GRAY:
 	case FIMG_TYPE_RGB:
-	case FIMG_TYPE_RGBA:		return 1;
+	case FIMG_TYPE_RGBA:
+	case FIMG_TYPE_RGBZ:		return 1;
 	}
 return 0;
 }
@@ -30,13 +31,14 @@ switch (type) {
  	case FIMG_TYPE_GRAY:		return "gray";
 	case FIMG_TYPE_RGB:		return "rgb";
 	case FIMG_TYPE_RGBA:		return "rgba";
+	case FIMG_TYPE_RGBZ:		return "rgbz";
 	}
 return "???";
 }
 /* --------------------------------------------------------------------- */
 int fimg_print_version(int k)
 {
-fprintf(stderr, "*** FloatImg library, alpha v%d (%s, %s)\n",
+fprintf(stderr, "*** FloatImg library, alpha %d (%s, %s)\n",
 		FIMG_VERSION, __DATE__, __TIME__);
 
 if (51 == k) {
@@ -52,6 +54,7 @@ void fimg_print_sizeof(void)
 {
 fprintf(stderr, "   sz FloatImg =   %lu\n", sizeof(FloatImg));
 fprintf(stderr, "   sz filehead =   %lu\n", sizeof(FimgFileHead));
+fprintf(stderr, "   sz filter   =   %lu\n", sizeof(FimgFilter3x3));
 }
 /* --------------------------------------------------------------------- */
 void fimg_printhead(FloatImg *h)
@@ -81,19 +84,35 @@ printf("    pixels@      %p  %p  %p %p\n",
 return 0;
 }
 /* ---------------------------------------------------------------- */
-/*
- *	values for the parameter 't' are defined in 'floatimg.h'
- */
-int fimg_create(FloatImg *fimg, int w, int h, int t)
+static float *plane_alloc(int size)
 {
-int		surface, size;
 float		*fptr;
 
 #if DEBUG_LEVEL
-fprintf(stderr, ">>> %-25s ( %p %d %d %d )\n", __func__, fimg, w, h, t);
+fprintf(stderr, ">>> %s ( %d )\n", __func__, size);
 #endif
 
-if ( ! fimg_type_is_valid(t) ) {
+fptr = calloc(size, sizeof(float));
+if (NULL==fptr) {
+	fprintf(stderr, "no more memory available, ABEND\n");
+	abort();
+	}
+return fptr;
+}
+/* ---------------------------------------------------------------- */
+/*
+ *	values for the parameter 'type' are defined in 'floatimg.h'
+ */
+int fimg_create(FloatImg *fimg, int w, int h, int type)
+{
+int		size;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %d %d %d )\n", __func__, fimg, w, h, type);
+#endif
+
+if ( ! fimg_type_is_valid(type) ) {
+	fprintf(stderr, "%s: type %d invalid\n", __func__, type);
 	return -2;
 	}
 
@@ -101,35 +120,24 @@ if ( ! fimg_type_is_valid(t) ) {
  *	what to do if we've got a descriptor for an image
  *	already allocated ?
 */
-
 memset(fimg, 0, sizeof(FloatImg));
 
-surface = w * h;
-size    = surface * t * sizeof(float);
-#if DEBUG_LEVEL > 1
-fprintf(stderr, "surface is %d pixels, need %d bytes\n", surface, size);
-#endif
-
-fptr = (float *)malloc(size);
-if (NULL==fptr) {
-	fprintf(stderr, "%s : no mem, exiting.\n", __func__);
-	exit(1);
-	}
-
-#if DEBUG_LEVEL > 1
-fprintf(stderr, "   %s: got %d bytes at %p\n", __func__, size, fptr);
-#endif
-
+size    = w * h;
 fimg->width = w;	fimg->height = h;
-fimg->type = t;
+fimg->type  = type;
 
-fimg->R = fptr;	
-if ( (t==FIMG_TYPE_RGB) || (t==FIMG_TYPE_RGBA) ) {
-	fimg->G = fptr + surface;
-	fimg->B = fptr + surface + surface;
+/* the red channel is allway allocated */
+fimg->R = (float *)plane_alloc(size);
+
+if (FIMG_TYPE_RGB == type) {
+	fimg->G = (float *)plane_alloc(size);
+	fimg->B = (float *)plane_alloc(size);
 	}
-if ( t==FIMG_TYPE_RGBA )	fimg->A = fptr + (3 * surface); 
-/* ok this a really WTF fragment of code */
+
+if (FIMG_TYPE_RGBA == type) {
+	fimg->A = (float *)plane_alloc(size);
+	}
+
 
 return 0;
 }
@@ -156,6 +164,8 @@ if (NULL == fimg->R) {
 	fprintf(stderr, "%s : %p already freed ?\n", __func__, fimg);
 	return -3;
 	}
+
+
 free(fimg->R);
 memset(fimg, 0, sizeof(FloatImg));
 
@@ -167,7 +177,7 @@ int fimg_clone(FloatImg *old, FloatImg *new, int flags)
 int		foo;
 
 #if DEBUG_LEVEL
-fprintf(stderr, ">>> %-25s ( %p %p 0x%x)\n", __func__, old, new, flags);
+fprintf(stderr, ">>> %s ( %p %p 0x%x )\n", __func__, old, new, flags);
 #endif
 
 if ( ! fimg_type_is_valid(old->type) ) {
@@ -197,7 +207,7 @@ int		size;
 int		foo;
 
 #if DEBUG_LEVEL
-fprintf(stderr, ">>> %-25s ( %p %p )\n", __func__, from, to);
+fprintf(stderr, ">>> %s ( %p %p )\n", __func__, from, to);
 #endif
 
 foo = fimg_images_not_compatible(from, to);
@@ -206,8 +216,10 @@ if (foo) {
 	return foo;
 	}
 
-size = from->width * from->height * from->type * sizeof(float);
+size = from->width * from->height * sizeof(float);
 memcpy(to->R, from->R, size);
+memcpy(to->G, from->G, size);
+memcpy(to->B, from->B, size);
 
 return 0;
 }
diff --git a/lib/fimg-file.c b/lib/fimg-file.c
index 32c988c5..e967e043 100644
--- a/lib/fimg-file.c
+++ b/lib/fimg-file.c
@@ -52,6 +52,9 @@ datas[2] = filehead.t;
 return 0;
 }
 /* ---------------------------------------------------------------- */
+/*
+ *	/!\		thi func work ONLY on RGB image
+ */
 int fimg_dump_to_file(FloatImg *fimg, char *fname, int notused)
 {
 FILE		*fp;
@@ -75,7 +78,7 @@ if (NULL==fp) {
 	}
 
 memset(&filehead, 0, sizeof(filehead));
-strcpy(filehead.magic, "FIMG");
+memcpy(filehead.magic, "FIMG", 4);
 filehead.w = fimg->width;	filehead.h = fimg->height;
 filehead.t = fimg->type;
 
@@ -85,16 +88,19 @@ if (1 != foo) {
 	fclose(fp);
 	return -2;
 	}
-nbre = fimg->width*fimg->height*3;
-#if DEBUG_LEVEL
-fprintf(stderr, "  %s : data at %p\n", __func__, fimg->R);
-#endif
+nbre = fimg->width * fimg->height;	/* pixels per frame */
 
 foo = fwrite(fimg->R, sizeof(float), nbre, fp);
 if (nbre != foo) {
-	perror(fname);
-	fclose(fp);
-	return -3;
+	perror(fname); fclose(fp); return -3;
+	}
+foo = fwrite(fimg->G, sizeof(float), nbre, fp);
+if (nbre != foo) {
+	perror(fname); fclose(fp); return -3;
+	}
+foo = fwrite(fimg->B, sizeof(float), nbre, fp);
+if (nbre != foo) {
+	perror(fname); fclose(fp); return -3;
 	}
 	
 fclose(fp);
@@ -130,18 +136,27 @@ if (1 != foo) {
 if (	(filehead.w != where->width) ||
 	(filehead.h != where->height) ||
 	(filehead.t != where->type) ) {
+		fprintf(stderr, "%s: file '%s' incompatible\n",
+				__func__, fname);
+		fclose(fp);
+		return -17;
+		}
 
-	fprintf(stderr, "%s: file '%s' incompatible\n", __func__, fname);
-	fclose(fp);
-	return -17;
-	}
-
-nbre = filehead.w*filehead.h*filehead.t;	/* ugly quirk */
+nbre = filehead.w * filehead.h;		/* number of pixels per frame */
 foo = fread(where->R, sizeof(float), nbre, fp);
 if (nbre != foo) {
 	fprintf(stderr, "%s: err read '%s' : %d\n", __func__, fname, foo);
-	fclose(fp);
-	return -18;
+	fclose(fp);	return -18;
+	}
+foo = fread(where->G, sizeof(float), nbre, fp);
+if (nbre != foo) {
+	fprintf(stderr, "%s: err read '%s' : %d\n", __func__, fname, foo);
+	fclose(fp);	return -18;
+	}
+foo = fread(where->B, sizeof(float), nbre, fp);
+if (nbre != foo) {
+	fprintf(stderr, "%s: err read '%s' : %d\n", __func__, fname, foo);
+	fclose(fp);	return -18;
 	}
 
 fclose(fp);
@@ -153,7 +168,7 @@ return 0;
 int fimg_create_from_dump(char *fname, FloatImg *head)
 {
 FILE		*fp;
-int		foo;
+int		foo, size;
 FimgFileHead	filehead;
 
 #if DEBUG_LEVEL
@@ -173,13 +188,14 @@ if (NULL==fp) {
 	
 foo = fread(&filehead, sizeof(FimgFileHead), 1, fp);  
 if (1 != foo) {
-	fprintf(stderr, "%s : short read\n", fname);
+	fprintf(stderr, "%s: short read on '%s'\n", __func__, fname);
 	fclose(fp);
 	return -16;
 	}
 #if DEBUG_LEVEL
-fprintf(stderr, "%s : got [ %d %d %d ] from '%s'\n", __func__,
-			filehead.w, filehead.h, filehead.t, fname);
+fprintf(stderr, "%s : got [ %dx%d %s ] from '%s'\n", __func__,
+			filehead.w, filehead.h, fimg_str_type(filehead.t),
+						fname);
 #endif
 
 foo = fimg_create(head, filehead.w, filehead.h, filehead.t); 
@@ -188,10 +204,11 @@ if (foo) {
 	return foo;
 	}
 
-/* NO No no !!!           don't do that !!!		*/
-foo = fread(head->R, sizeof(float),
-		filehead.w*filehead.h*filehead.t, fp);
-
+size = filehead.w * filehead.h;
+foo = 0;
+foo += fread(head->R, sizeof(float), size, fp);
+foo += fread(head->G, sizeof(float), size, fp);
+foo += fread(head->B, sizeof(float), size, fp);
 
 fclose(fp);
 
diff --git a/lib/fimg-math.c b/lib/fimg-math.c
index 3b3c7c65..6975866d 100644
--- a/lib/fimg-math.c
+++ b/lib/fimg-math.c
@@ -98,7 +98,7 @@ memset(accus, 0, 4*sizeof(double));
 
 for (idx=0; idx<surface; idx++) {
 	accus[0] += head->R[idx];
-	if (head->type > 2) {
+	if (head->type > 2) {			/* WTF ? */
 		accus[1] += head->G[idx];
 		accus[2] += head->B[idx];
 		}
@@ -123,8 +123,6 @@ Mais c,a ne semble pas etre la bonne methode. Il faut aller voir :
 https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
 */
 
-
-
 /* ---------------------------------------------------------------- */
 /*
  *	more elaborate functions are in fimg-2gray.c
@@ -159,12 +157,14 @@ if (fi->type != FIMG_TYPE_RGB) {
 	return;
 	}
 
-nbre = fi->width * fi->height * fi->type;
+nbre = fi->width * fi->height ;
 #if DEBUG_LEVEL
 fprintf(stderr, "%s, nbre is %d\n", __func__, nbre);
 #endif
 for (idx=0; idx<nbre; idx++) {
 	fi->R[idx] += value;
+	fi->G[idx] += value;
+	fi->B[idx] += value;
 	}
 }
 /* ---------------------------------------------------------------- */
@@ -179,11 +179,13 @@ if (fi->type != FIMG_TYPE_RGB) {
 	return -1;
 	}
 
-nbre = fi->width * fi->height * fi->type;
+nbre = fi->width * fi->height;
 
 count = 0;
 for (idx=0; idx<nbre; idx++) {
 	if (fi->R[idx] < 0.0) count++;
+	if (fi->G[idx] < 0.0) count++;
+	if (fi->B[idx] < 0.0) count++;
 	}
 
 return count;
@@ -237,12 +239,21 @@ if ( (fi->type != FIMG_TYPE_RGB) && (fi->type != FIMG_TYPE_GRAY) ) {
 	return;
 	}
 
-nbre = fi->width * fi->height * fi->type;
+nbre = fi->width * fi->height;
 #if DEBUG_LEVEL
 fprintf(stderr, "%s, nbre of datum is %d\n", __func__, nbre);
 #endif
-for (idx=0; idx<nbre; idx++) {
-	fi->R[idx] *= value;
+if (fi->type == FIMG_TYPE_RGB) {
+	for (idx=0; idx<nbre; idx++) {
+		fi->R[idx] *= value;
+		fi->G[idx] *= value;
+		fi->B[idx] *= value;
+		}
+	}
+if (fi->type == FIMG_TYPE_GRAY) {
+	for (idx=0; idx<nbre; idx++) {
+		fi->R[idx] *= value;
+		}
 	}
 }
 /* ---------------------------------------------------------------- */
diff --git a/lib/t.c b/lib/t.c
index 8cfa1e9e..a84b48b1 100644
--- a/lib/t.c
+++ b/lib/t.c
@@ -153,6 +153,8 @@ int essai_clone_et_copy(int unused)
 FloatImg	A, B, C;
 int		foo;
 
+fprintf(stderr, "-------- %s ( %d ) --------\n", __func__, unused);
+
 foo = fimg_create(&A, TAILLE, TAILLE, FIMG_TYPE_RGB);
 if (foo) {
 	fprintf(stderr, "%s err create A %d\n", __func__, foo);
@@ -230,6 +232,8 @@ int		foo;
 FloatImg 	dessin, copy;
 double		maxi;
 
+fprintf(stderr, "-------- %s ( '%s' ) --------\n", __func__, fname);
+
 foo = fimg_create_from_dump(fname, &dessin);
 if (foo) {
 	fprintf(stderr, "in %s, error %d loading '%s'\n",
@@ -238,6 +242,7 @@ if (foo) {
 	}
 
 foo = fimg_clone(&dessin, &copy, 0);
+fimg_save_as_pnm(&dessin, "dessin.pnm", 0);
 
 maxi = (double)fimg_get_maxvalue(&dessin);
 fprintf(stderr, "image source        valeur maxi = %f\n", maxi);
@@ -290,17 +295,14 @@ if (verbosity)	{
 	fimg_print_sizeof();
 	}
 
-// foo = essai_normalize();
-// fprintf(stderr, "retour essai normalize -> %d\n", foo);
-
-// foo = essai_contraste("quux.fimg");
-// fprintf(stderr, "retour essai contraste -> %d\n", foo);
+foo = essai_contraste("quux.fimg");
+fprintf(stderr, "retour essai contraste -> %d\n", foo);
 
 // foo = essai_clone_et_copy(0);
 // fprintf(stderr, "retour essai clone'n'copy -> %d\n", foo);
 
-foo = essai_timer(0);
-fprintf(stderr, "retour essai  -> %d\n", foo);
+// foo = essai_timer(0);
+// fprintf(stderr, "retour essai timer -> %d\n", foo);
 
 return 0;
 }
diff --git a/tools/README.md b/tools/README.md
index 25958ace..04f8d1bf 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -1,5 +1,8 @@
 # Images en virgule flottante, les outils.
 
+Dans tous les cas, vous pouvez utiliser l'option `-h` pour avoir des
+explications sur ce que vous pouvez faire.
+
 ## mkfimg
 
 ## fimgops
@@ -9,3 +12,9 @@
 ## fimgstats
 
 ## fimg2pnm - fimg2png
+
+## fimg2text
+
+Nouveau de l'année 2020+1 : exfiltrer toutes des données d'une image flottante
+afin de les rendre machinables.
+
diff --git a/tools/fimg2text.c b/tools/fimg2text.c
index 76c7235e..53cd8ace 100644
--- a/tools/fimg2text.c
+++ b/tools/fimg2text.c
@@ -12,7 +12,7 @@
 
 int		verbosity;
 
-/* ------------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
 int export_as_machinable(FloatImg *src, char *fname, int steps, int flags)
 {
 FILE		*fp;
@@ -44,7 +44,7 @@ for (y=0; y<src->height; y+=steps) {
 
 return 0;
 }
-/* ------------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
 static int normalize(FloatImg *pimg, float vmax)
 {
 float		mmv[6], maxi, coef;
@@ -79,7 +79,7 @@ for (idx=0; idx<sz; idx++) {
 
 return 0;
 }
-/* ------------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
 int convertir_fimg_en_machinable(char *srcname, char *dstname,
 					int steps, float norm)
 {
@@ -125,18 +125,18 @@ fimg_destroy(&fimg);
 
 return 0;
 }
-/* ------------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
 void help(int k)
 {
 puts("usage:\n\tfimg2text [options] foo.fimg > bar.csv");
 puts("options:");
-puts("\t-v\tincrease verbosity");
-puts("\t-n 3.14\tnormalize picture");
-puts("\t-s N\nsteps on x & y");
+puts("\t-v\t\tincrease verbosity");
+puts("\t-n 3.14\t\tnormalize picture");
+puts("\t-s N\t\tsteps on x & y");
 if (verbosity) fimg_print_version(1);
 exit(0);
 }
-/* ------------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
 
 int main(int argc, char *argv[])
 {
@@ -154,7 +154,7 @@ while ((opt = getopt(argc, argv, "hn:s:v")) != -1) {
 	}
 
 if (1 != argc-optind) {
-	fprintf(stderr, "error: %s need one filename\n", argv[0]);
+	fprintf(stderr, "error: %s need one intput filename\n", argv[0]);
 	exit(1);
 	}
 
@@ -165,5 +165,5 @@ if (foo) {
 
 return 0;
 }
-/* ------------------------------------------------------------------------- */
+/* --------------------------------------------------------------------- */
 
diff --git a/tools/fimgops.c b/tools/fimgops.c
index 91bc9b21..639a515a 100644
--- a/tools/fimgops.c
+++ b/tools/fimgops.c
@@ -65,7 +65,7 @@ static void help(int lj)
 
 puts("usage:\n\tfimgops [options] A.fimg B.fimg operator D.fimg");
 puts("options:");
-puts("\t-g              convert output to gray");
+// puts("\t-g              convert output to gray");
 puts("\t-k N.N          set float value");
 puts("\t-v              increase verbosity");
 pr_opcodes();
@@ -112,6 +112,7 @@ FloatImg	srcA, srcB, dest;
 
 while ((opt = getopt(argc, argv, "hk:v")) != -1) {
 	switch(opt) {
+		case 'g':					break;
 		case 'h':	help(0);			break;
 		case 'k':	global_fvalue = atof(optarg);	break;
 		case 'v':	verbosity++;			break;
diff --git a/tools/mkfimg.c b/tools/mkfimg.c
index 07eb6b5d..09dcae59 100644
--- a/tools/mkfimg.c
+++ b/tools/mkfimg.c
@@ -1,3 +1,8 @@
+/*
+ *	making a floatimg with some random datas
+ *	an ugly software from tTh - february 2021
+ */
+
 #include  <stdio.h>
 #include  <string.h>
 #include  <stdlib.h>
@@ -137,7 +142,7 @@ switch(type) {
 
 foo = fimg_dump_to_file(&fimg, fname, 0);
 if (foo) {
-	fprintf(stderr, "dump fimg -> %d\n", foo);
+	fprintf(stderr, "dump fimg to %s -> %d\n", fname, foo);
 	exit(1);
 	}