diff --git a/Lib/essais.c b/Lib/essais.c
index 2068472..8ae2da0 100644
--- a/Lib/essais.c
+++ b/Lib/essais.c
@@ -216,18 +216,17 @@ if (NULL==(src=Image_TGA_alloc_load(srcname))) {
 	}
 /* on va creer le receptacle des horreurs */
 if (NULL==(dst=Image_clone(src, 0))) {
+	fprintf(stderr, "%s: err clone\n", __func__);
 	exit(5);
 	}
 
 /* ah bravo ! enfin un test unitaire appelable
  * depuis le test unitaire */
-for (idx=0; idx<20; idx++)
-	{
+for (idx=0; idx<20; idx++) {
 	foo = Image_essai_col_reduce(src, dst, 133, idx);
 	printf("le retour de l'essai_col_reduce %d est %d\n", idx, foo);
-	if (OLL_KORRECT==foo)
-		{
-		sprintf(fname, "Pictures/aaaa-colredux-%02d.tga", idx);
+	if (OLL_KORRECT==foo) {
+		sprintf(fname, "aaaa-colredux-%02d.tga", idx);
 		Image_TGA_save(fname, dst, 0);
 		}
 	}
@@ -582,32 +581,30 @@ int		foo, ax, ay;
 
 printf("====== essais Warping sur %s (k=%d) ====\n", srcname, k);
 
-if (NULL == (src = Image_TGA_alloc_load(srcname)) )
-	{
+if (NULL == (src = Image_TGA_alloc_load(srcname)) ) {
 	fprintf(stderr, "Err loading '%s'\n", srcname);
 	exit(5);
 	}
 dst = Image_clone(src, 0);
 
 foo = Image_warp_essai_0(src, dst, 33.5, 100, 100);
-Image_TGA_save("Pictures/warp-essai-0.tga", dst, 0);
+Image_TGA_save("warp-essai-0.tga", dst, 0);
 
 foo = Image_center_rotate(src, dst, 21.5);
-Image_TGA_save("Pictures/warp-center-rotate.tga", dst, 0);
+Image_TGA_save("warp-center-rotate.tga", dst, 0);
 
 ax = (src->width * 2) / 3;
 ay = (src->height * 2) / 3;
 foo = Image_shift_xy(src, dst, ax, ay);
-Image_TGA_save("Pictures/warp-shift-xy.tga", dst, 0);
+Image_TGA_save("warp-shift-xy.tga", dst, 0);
 foo = Image_shift_x(src, dst, ax);
-Image_TGA_save("Pictures/warp-shift-x.tga", dst, 0);
+Image_TGA_save("warp-shift-x.tga", dst, 0);
 foo = Image_shift_y(src, dst, ay);
-Image_TGA_save("Pictures/warp-shift-y.tga", dst, 0);
+Image_TGA_save("warp-shift-y.tga", dst, 0);
 
 Image_DeAllocate(src);  free(src);
 Image_DeAllocate(dst);  free(dst);
 
-
 return 42;
 }
 /*::------------------------------------------------------------------::*/
@@ -795,7 +792,7 @@ Image_DeAllocate(dst);	free(dst);
 return 42;
 }
 /*::------------------------------------------------------------------::*/
-int Test_classif(char *srcname, int k)
+int Test_Classif(char *srcname, int k)
 {
 Image_Desc	*src, *dst;
 int		foo;
@@ -812,8 +809,7 @@ static Une_Classe_Sph classs[] =
 	{   0, 255,   0,   DC,     0, 255,   0 }
 	};
 
-if (NULL == (src = Image_TGA_alloc_load(srcname)) )
-	{
+if (NULL == (src = Image_TGA_alloc_load(srcname)) ) {
 	fprintf(stderr, "Err loading '%s'\n", srcname);
 	exit(5);
 	}
@@ -821,11 +817,11 @@ dst = Image_clone(src, 0);
 
 foo = Image_classif_0(src, dst);
 Image_print_error("essai classif 0", foo);
-Image_TGA_save("Pictures/aaaa-classif0.tga", dst, 0);
+Image_TGA_save("aaaa-classif0.tga", dst, 0);
 
 foo = Image_classif_1(src, dst, classs, 5, 0);
 Image_print_error("essai classif 1", foo);
-Image_TGA_save("Pictures/aaaa-classif1.tga", dst, 0);
+Image_TGA_save("aaaa-classif1.tga", dst, 0);
 
 Image_DeAllocate(src);	free(src);
 Image_DeAllocate(dst);	free(dst);
@@ -1159,7 +1155,7 @@ Image_dump_descriptor(source, "just after load");
  * est-ce bien necessaire ?
  */
 /* Image_egalise_RGB(source, source, 0); */
-wf = source->width;		hf = (source->height) * 4;
+wf = source->width;		hf = (source->height) * 3;
 x2 = source->width / 2;		y2 = source->height / 2;
 rect.w = x2;			rect.h = y2;
 rect.x = 0;			rect.y = 0;
@@ -1353,8 +1349,7 @@ Image_DeAllocate(finale);	free(finale);
 return 42;
 }
 /*::------------------------------------------------------------------::*/
-int
-Test_des_tamppools(char *imgname, int param)
+int Test_des_tamppools(char *imgname, int param)
 {
 void	*ptr;
 int	foo;
@@ -1377,7 +1372,7 @@ int Test_des_filtres(char *srcname, int k)
 Image_Desc	*src, *dst;
 int		foo;
 
-printf("=============== LES FILTRES =====[ %s ]====[ %d ]====\n", srcname, k);
+printf("=============== Filtres =====[ %s ]====[ %d ]====\n", srcname, k);
 
 src = Image_TGA_alloc_load(srcname);
 if (NULL == src) {
@@ -1397,8 +1392,11 @@ foo = Image_filtre_Prewitt(src, dst, 5);
 Image_TGA_save("filtre-prewitt-5.tga", dst, 0);
 foo = Image_filtre_passe_haut(src, dst);
 Image_TGA_save("filtre-passe-haut.tga", dst, 0);
+
+/*
 foo = Image_filtre_Sobel_4(src, dst, 0);
 Image_TGA_save("filtre-sobel-4.tga", dst, 0);
+*/
 
 Image_DeAllocate(src);	free(src);
 Image_DeAllocate(dst);	free(dst);
@@ -1494,3 +1492,17 @@ Image_DeAllocate(dst);	free(dst);
 return -1;
 }
 /*::------------------------------------------------------------------::*/
+/*		==============================				*/
+
+void essai_gradients(void)
+{
+int		foo;
+
+foo = Image_plot_H_gradient("foo.tga", 640, 200);
+fprintf(stderr, "plot h gradient -> %d\n", foo);
+foo = Image_plot_V_gradient("foo.tga", 900, 200);
+fprintf(stderr, "plot v gradient -> %d\n", foo);
+}
+/*		==============================				*/
+/*::------------------------------------------------------------------::*/
+
diff --git a/Lib/testtga.c b/Lib/testtga.c
index 4a3834c..b534146 100644
--- a/Lib/testtga.c
+++ b/Lib/testtga.c
@@ -53,7 +53,7 @@ else
 
 Image_start_chrono("Essai", 0);
 
-for (idx=0; idx<1; idx++) {
+for (idx=0; idx<3; idx++) {
 	foo = Test_Egalisations(fichier, 0);
 	fprintf(stderr, "    essai egalisation -> %d\n", foo);
 	foo = Essai_Televisions(fichier, 10); 
@@ -64,17 +64,24 @@ for (idx=0; idx<1; idx++) {
 	fprintf(stderr, "    essai filtres     -> %d\n", foo);
 	foo = Test_RGBmask(fichier);
 	fprintf(stderr, "    essai rgb mask    -> %d\n", foo);
+	foo = Test_Classif(fichier, 0);
+	fprintf(stderr, "    essai classif     -> %d\n", foo);
+	foo = Test_des_warpings(fichier, 0);
+	fprintf(stderr, "    essai warping     -> %d\n", foo);
 
-	fprintf(stderr, "********* %s: fin passe %d\n", argv[0], idx);
+
+	fprintf(stderr, "\n*************** %s: fin passe %d ******\n\n",
+						argv[0], idx);
 	}
 
 #if 0
+
+foo = Essai_color_2_map(fichier, idx);
+fprintf(stderr, "    essai col2map     -> %d\n", foo);
+
 foo = test_du_jpeg_reader("in.jpeg");
 fprintf(stderr, "    essai lecture jpeg -> %d\n", foo);
 
-foo = Test_Dithering(fichier, 17);
-fprintf(stderr, "essai dithering -> %d\n", foo);
-
 Test_des_patterns("/tmp/pattt", 0, 0);
 foo = Essai_des_jauges(fichier, 17);