diff --git a/funcs/hsv.c b/funcs/hsv.c
index 5eb8ae9..c0fb0f3 100644
--- a/funcs/hsv.c
+++ b/funcs/hsv.c
@@ -1,6 +1,11 @@
 /*
  *		FloatImg library
  *		HUE - SATURATION - VALUE
+
+       +---------------------------------------------+
+       |    ce code ne fonctionne vraiment PAS !     |
+       +---------------------------------------------+
+
  */
 
 #include  <stdio.h>
@@ -111,9 +116,12 @@ return 0;
 }
 
 /* --------------------------------------------------------------------- */
+/*
+ *		expect garbage !
+ */
 int fimg_essai_hsv(char *fname)
 {
-float		colors[3], values[3];
+float		colors[3], values[3], newcols[3];
 int		foo, r, g, b;
 
 #define INC  16
@@ -121,19 +129,29 @@ for (r=0; r<255; r+=INC) {
  for (g=0; g<255; g+=INC) {
   for (b=0; b<255; b+=INC) {
 
-	printf("%4d %4d %4d   ", r, g, b);
+	printf("%4d %4d %4d  ", r, g, b);
 
 	colors[0] = (float)r;
 	colors[1] = (float)g;
 	colors[2] = (float)b;
 	foo = fimg_rgb2hsv(colors, values, 255.0);
 	if (foo) {
+		fprintf(stderr, "%s: err %d in rgv->hsv\n", __func__, foo);
 		exit(1);
 		}
 
-	printf("      %9.5f   %9.5f   %9.5f\n",
+	printf("   %8.4f %8.4f %8.4f   ",
 			values[0], values[1], values[2]);
 
+	foo = fimg_hsv2rgb(values, newcols, 255.0);
+	if (foo) {
+		fprintf(stderr, "%s: err %d in hsv->rgb\n", __func__, foo);
+		exit(1);
+		}
+
+	printf("   %8.4f %8.4f %8.4f\n",
+			newcols[0], newcols[1], newcols[2]);
+
 	}
  }
 }