diff --git a/funcs/Makefile b/funcs/Makefile
index 9dbf5df8..971c09e3 100644
--- a/funcs/Makefile
+++ b/funcs/Makefile
@@ -5,7 +5,7 @@ DEPS = ../floatimg.h Makefile
 OBJS = fimg-png.o fimg-tiff.o misc-plots.o filtrage.o utils.o	\
 	fimg-libpnm.o rampes.o sfx0.o geometry.o rotate.o	\
 	equalize.o fimg-fits.o saturation.o histogram.o		\
-	hsv.o classif.o contour2x2.o
+	hsv.o classif.o contour2x2.o qsortrgb.o
 
 #---------------------------------------------------------------
 
@@ -64,6 +64,10 @@ rampes.o:		rampes.c $(DEPS)
 classif.o:		classif.c $(DEPS)
 	gcc $(COPT) -c $<
 
+qsortrgb.o:		qsortrgb.c $(DEPS)
+	gcc $(COPT) -c $<
+
+
 hsv.o:		hsv.c $(DEPS)
 	gcc $(COPT) -c $<
 
diff --git a/funcs/qsortrgb.c b/funcs/qsortrgb.c
new file mode 100644
index 00000000..05456b24
--- /dev/null
+++ b/funcs/qsortrgb.c
@@ -0,0 +1,41 @@
+/*
+ *		qsort_rgb.c
+ */
+
+#include   <stdio.h>
+#include   <stdlib.h>
+#include   <string.h>
+#include   <math.h>
+
+#include   "../floatimg.h"
+
+int		verbosity;
+
+/* --------------------------------------------------------------------- */
+/* nouveau 7 octobre 2020, juste avant sonoptic de la pluie craignos	 */
+
+static int compare(const void *p1, const void *p2)
+{
+return		( *(float *)p1 < *(float *)p2 );
+}
+
+int fimg_qsort_rgb(FloatImg *psrc, FloatImg *pdst, int notused)
+{
+int		foo, szimg;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, psrc, pdst, notused);
+ #endif
+
+foo = fimg_copy_data(psrc, pdst);
+
+szimg = pdst->width * pdst->height;
+fprintf(stderr, "%s : %d pixels\n", __func__, szimg);
+
+qsort(pdst->R, szimg, sizeof(float), compare);
+qsort(pdst->G, szimg, sizeof(float), compare);
+qsort(pdst->B, szimg, sizeof(float), compare);
+
+return 0;
+}
+/* --------------------------------------------------------------------- */
diff --git a/funcs/t.c b/funcs/t.c
index 08330fb2..17befa52 100644
--- a/funcs/t.c
+++ b/funcs/t.c
@@ -14,6 +14,48 @@ int		verbosity;
 
 float		global_fvalue;
 
+/* --------------------------------------------------------------------- */
+/*
+ *	nouveau 7 octobre 2020 pendant sonoptic
+ */
+
+int fimg_qsort_rgb(FloatImg *psrc, FloatImg *pdst, int notused);
+
+int essai_qsort_rgb(char *infile)
+{
+FloatImg	src, dst;
+int		foo;
+
+if (NULL != infile) {
+	fprintf(stderr, "%s : loading %s\n", __func__, infile);
+	foo = fimg_create_from_dump(infile, &src);
+	if (foo) {
+		fprintf(stderr, "%s: error loading '%s'\n", __func__, infile);
+		return foo;
+		}
+	}
+else	{
+	fprintf(stderr, "%s : NOT INPUT FILE, FUBAR\n", __func__);
+	abort();
+	}
+
+fimg_clone(&src, &dst, 1);
+
+foo = fimg_qsort_rgb(&src, &dst, 0);
+if (foo) {
+	fprintf(stderr, "%s: err %d in qsort_rgb\n", __func__, foo);
+	return foo;
+	}
+
+foo = fimg_save_as_pnm(&dst, "out.pnm", 0);
+if (foo) {
+	fprintf(stderr, "%s : err %d saving result\n", __func__, foo);
+	return foo;
+	}
+
+return 0;
+}
+
 /* --------------------------------------------------------------------- */
 /*
  *	nouveau 5 octobre 2020 pendant sonoptic
@@ -511,7 +553,7 @@ return 0;
 }
 /* --------------------------------------------------------------------- */
 enum nCmd { Equalize=1, Rotate, Sfx0, F3x3, MIRE, Wfits, Wpng, Wtiff,
-			Histo, Hsv, Classif, Ctr2x2  };
+			Histo, Hsv, Classif, Ctr2x2, Qsortrgb  };
 typedef struct {
 	char	*name;
 	int	Cmd;
@@ -530,6 +572,7 @@ Command commands[] = {
 	{ "hsv",	Hsv		},
 	{ "classif",	Classif		},
 	{ "ctr2x2",	Ctr2x2		},
+	{ "qsortrgb",	Qsortrgb	},
 	{ NULL,		0		}
 	} ;
 
@@ -634,6 +677,9 @@ switch(opt) {
 	case Ctr2x2:
 		foo = essai_contour_2x2(filename);
 		break;
+	case Qsortrgb:
+		foo = essai_qsort_rgb(filename);
+		break;
 	default:
 		fprintf(stderr, "%s : bad command\n", command);
 		exit(1);