diff --git a/.gitignore b/.gitignore
index cb77163..5fba36f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -67,6 +67,7 @@ Fonderie/*.o
 Fonderie/*.png
 Fonderie/*.pnm
 Fonderie/*.gif
+Fonderie/*.fimg
 Fonderie/fonderie
 Fonderie/interpolator
 Fonderie/t
diff --git a/Fonderie/crapulator.c b/Fonderie/crapulator.c
index 4485e69..62fca29 100644
--- a/Fonderie/crapulator.c
+++ b/Fonderie/crapulator.c
@@ -97,9 +97,19 @@ FimgFilter3x3	hipass = {
 	1.0,	0.0
 	};
 
+FimgFilter3x3	diagonal = {
+		{
+		2.0,	1.0,	0.0,
+		1.0,	0.0,	-1.0,
+		0.0,	-1.0,	-2.0,
+		},
+	1.0,	0.0
+	};
+
 switch (typef) {
 	case 0:		pfiltre = &lowpass;		break;
 	case 1:		pfiltre = &hipass;		break;
+	case 2:		pfiltre = &diagonal;		break;
 	default:
 		fprintf(stderr, "%s: bad filter number %d\n",
 				__func__, typef);
@@ -114,7 +124,9 @@ if (retval) {
 	fprintf(stderr, "%s error %d on filter\n", __func__, retval);
 	exit(1);
 	}
-fimg_killborders(&img);		/* XXX WTF OMG */
+/*
+ *	may be, here, we can check for negative values ? */
+fimg_killborders(&img);
 fimg_copy_data(&img, pimg);
 fimg_destroy(&img);
 
@@ -220,6 +232,9 @@ switch (idFx) {
 				/* hipass filter */
 		retval = insitu_filtre3x3(image, 1);
 		break;
+	case CR_diagonal:
+		retval = insitu_filtre3x3(image, 2);
+		break;
 	case CR_octotree:
 		retval = octotree_classif(image, 0.500, 0);
 		break;
diff --git a/Fonderie/crapulors.liste b/Fonderie/crapulors.liste
index 05fd1f2..f1afc31 100644
--- a/Fonderie/crapulors.liste
+++ b/Fonderie/crapulors.liste
@@ -26,6 +26,7 @@
 27	shiftln0	1	1.0
 28	qsortrgb	2	1.0
 30	multidots	100	1.333
+31	diagonal	1	1.0
 42	nothing		42	3.1415926
 99	message		1	1.0
 -1	end		1	1.0
diff --git a/Fonderie/essai.sh b/Fonderie/essai.sh
index a3fe3d4..d800226 100755
--- a/Fonderie/essai.sh
+++ b/Fonderie/essai.sh
@@ -9,7 +9,8 @@ FILTRES=$(./t -L | awk 'NR>1 { print $1 }' | sort)
 
 rm /tmp/fstack*.png
 
-SRC=$(ls -rt1 $HOME/Essais/FondageDePlomb/capture/* | tail -1)
+# SRC=$(ls -rt1 $HOME/Essais/FondageDePlomb/capture/* | tail -1)
+SRC=mire.fimg
 
 for F in $FILTRES
 do
@@ -53,6 +54,6 @@ ffmpeg	-nostdin				\
 # ------------------------------------------------------------
 #			MAIN
 
-essai_singlepass
+essai_filtres
 
 # ------------------------------------------------------------