From 198bd874f14c0075b14ad068ff6e5bcf0511db87 Mon Sep 17 00:00:00 2001
From: tth <tth@fubar.tetalab.org>
Date: Mon, 10 May 2021 00:05:52 +0200
Subject: [PATCH] need more work

---
 Fonderie/metriques.c | 40 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 35 insertions(+), 5 deletions(-)

diff --git a/Fonderie/metriques.c b/Fonderie/metriques.c
index 697f774..a069703 100644
--- a/Fonderie/metriques.c
+++ b/Fonderie/metriques.c
@@ -10,6 +10,7 @@
 extern int		verbosity;
 
 /*   --------------------------------------------------------------   */
+/*   usage --> sfx.c:trinitron					*/
 int stat_zone(FloatImg *pimg, int geom[4], float v3[3])
 {
 int		x, y, xe, ye;
@@ -43,9 +44,12 @@ return 0;
 }
 /*   --------------------------------------------------------------   */
 /*
- *	premier essai...
+ *	premier essai : moyenne de toutes les composantes
+ *			de tous les pixels.
+ *
+ *	Question: pourquoi pas le retour en double precision ?
  */
-int get_float_metric_a(FloatImg *pimg, float *where)
+int get_float_metric_avg(FloatImg *pimg, float *where)
 {
 float		means[4];	/* four values : R G B A */
 int		foo;
@@ -63,7 +67,8 @@ if (foo) {
 return 0;
 }
 /*   --------------------------------------------------------------   */
-int get_float_metric_b(FloatImg *pimg, float *where)
+/*		echantillonage des pixels rouges		*/
+int get_float_metric_iRed(FloatImg *pimg, float *where)
 {
 int	idx, size, nbre;
 double	adder;
@@ -79,6 +84,28 @@ for (idx=20; idx < size; idx+=42) {
 return 0;
 }
 /*   --------------------------------------------------------------   */
+int get_float_metric_LR(FloatImg *pimg, float *where)
+{
+int	coords[4], foo;
+float	valL[3], valR[3];
+
+coords[0] = 0;				//  X
+coords[1] = 0;				//  Y
+coords[2] = pimg->width / 2;		//  W
+coords[3] = pimg->height;		//  H
+
+foo = stat_zone(pimg, coords, valL);
+coords[1] = pimg->width / 2;
+foo = stat_zone(pimg, coords, valR);
+
+*where = valL[1] - valR[1];
+
+return 0;
+}
+/*   --------------------------------------------------------------   */
+/*
+ *		et voici le grand dispactheur
+ */
 int get_float_metric_from_file(char *fname, float *where, int mode)
 {
 FloatImg	image;
@@ -97,10 +124,13 @@ if (foo) {
 fval = -1.0;				/* sensible default value */
 switch (mode) {
 	case 0: case 1:
-		foo = get_float_metric_a(&image, &fval);
+		foo = get_float_metric_avg(&image, &fval);
 		break;
 	case 2:
-		foo = get_float_metric_b(&image, &fval);
+		foo = get_float_metric_iRed(&image, &fval);
+		break;
+	case 3:
+		foo = get_float_metric_LR(&image, &fval);
 		break;
 	default:
 		fprintf(stderr, "%s: method %d invalid\n",