new func: the max of max

floatimg.h

@@ -20,7 +20,7 @@
  *	https://git.tetalab.org/tTh/FloatImg
  */
 
-#define		FIMG_VERSION	(226)
+#define		FIMG_VERSION	(227)
 #define		RELEASE_NAME	("noname")
 #define		PATCH_LEVEL	("aaaa")
 
@@ -308,6 +308,8 @@ void  fimg_drand48(FloatImg *fi, float kmul);
 long   fimg_count_negativ(FloatImg *fi);
 long   fimg_clamp_negativ(FloatImg *fi);
 
+int fimg_max_of_max(FloatImg *img, float maxes[3]);
+
 /*	various funcs modules		*/
 int   fimg_load_from_png(char *filename, FloatImg *fimg);
 int   fimg_create_from_png(char *filename, FloatImg *fimg);

lib/fimg-math.c

@@ -116,7 +116,37 @@ for (idx=0; idx<surface; idx++) {
 	else if (fval > mmvals[5])	mmvals[5] = fval;
 	}
 
-return -0;
+return 0;
+}
+/* ---------------------------------------------------------------- */
+/* new: Fri Oct  6 19:51:28 UTC 2023
+ *
+ * can compute the maxima of a lot of pictures...
+ */
+
+fimg_max_of_max(FloatImg *img, float maxes[3])
+{
+float		localmax[3];
+int		idx, surface;
+float		fval;
+
+localmax[0] = localmax[1] = localmax[2] = -1e9;
+
+surface = img->width * img->height;
+for (idx=0; idx<surface; idx++) {
+	fval = img->R[idx];
+	if (fval > localmax[0])		localmax[0] = fval;
+	fval = img->G[idx];
+	if (fval > localmax[1])		localmax[1] = fval;
+	fval = img->B[idx];
+	if (fval > localmax[2])		localmax[2] = fval;
+	}
+
+if (localmax[0] > maxes[0])	maxes[0] = localmax[0];
+if (localmax[1] > maxes[1])	maxes[1] = localmax[1];
+if (localmax[2] > maxes[2])	maxes[2] = localmax[2];
+
+return 0;
 }
 /* ---------------------------------------------------------------- */
 int fimg_meanvalues(FloatImg *head, float means[4])

tools/cumulfimgs.c

@@ -6,6 +6,7 @@
 #include  <stdlib.h>
 #include  <unistd.h>
 #include  <stdint.h>
+#include  <string.h>
 
 #include  "../floatimg.h"
 
@@ -41,11 +42,12 @@ puts("");
 puts("$ cumulfimgs a.fimg b.fimg c-fimg ...");
 puts("cumulator options :");
 puts("\t-g\tconvert to gray level");
+puts("\t-m\tcompute the max of the maxes");
 puts("\t-o\tname of output file");
 puts("\t-s\trescale end image");
 puts("\t-v\tincrease verbosity");
 puts("");
-if (verbosity) { puts("Xperiment"); fimg_print_version(v); }
+fimg_print_version(v);
 exit(0);
 }
 /* --------------------------------------------------------------------- */
@@ -59,17 +61,19 @@ int		to_gray		= 0;
 int		experiment	= 0;
 int		rescale		= 0;
 int		src_loaded	= 0;
+int		minmax		= 0;
 
 char		*output_file	= "out.fimg";
 FloatImg	accu, temp;
-float		vals[6];
+float		vals[3];
 
 g_width = g_height = 0;
 
-while ((opt = getopt(argc, argv, "gho:svx")) != -1) {
+while ((opt = getopt(argc, argv, "ghmo:svx")) != -1) {
 	switch(opt) {
 		case 'g':	to_gray = 1;			break;
 		case 'h':	help(1);			break;
+		case 'm':	minmax++;			break;
 		case 'o':	output_file = optarg;		break;
 		case 's':	rescale = 1;			break;
 		case 'v':	verbosity++;			break;
@@ -83,9 +87,12 @@ if (verbosity)		fprintf(stderr, "------ cumulfimgs ------\n");
 fprintf(stderr, "argc = %d, optind = %d\n", argc, optind);
 #endif
 
+memset(vals, 0, 3*sizeof(float));
+
 for (idx=optind; idx<argc; idx++) {
 #if DEBUG_LEVEL 
-	fprintf(stderr, "%5d   %s\n", idx, argv[idx]);
+	fprintf(stderr, "----------------  %s\n", argv[idx]);
+	fflush(stderr);
 #endif
 	foo = testfile(argv[idx]);
 	if (foo) {
@@ -93,8 +100,15 @@ for (idx=optind; idx<argc; idx++) {
 		exit(1);
 		}
 
+	/*
+	 *	load the picture, create a clone of the first
+	 */
 	if ( ! src_loaded ) {
 		foo = fimg_create_from_dump(argv[idx], &accu);
+		if (foo) {
+			fprintf(stderr, "create from dump -> %d\n", foo);
+			exit(1);
+			}
 		fimg_clone(&accu, &temp, 0);
 		src_loaded = 1;
 		}
@@ -104,8 +118,20 @@ for (idx=optind; idx<argc; idx++) {
 			fprintf(stderr, "load from dump -> %d\n", foo);
 			exit(1);
 			}
-		fimg_add_2(&temp, &accu);
 		}
+
+	if (minmax) {
+		/*
+		 * print the maximum values and compute the
+		 * maximum of all the maximums
+		 */
+		foo = fimg_max_of_max(&temp, vals);
+		// fprintf(stderr, "%5d max of max %9.3f  %9.3f  %9.3f\n",
+		//			idx, vals[0], vals[1], vals[2]);
+		}
+
+	fimg_add_2(&temp, &accu);
+
 	compte++;
 	}
 
@@ -120,6 +146,9 @@ if (experiment) {
 	}
 /*	XXX 		*/
 
+fprintf(stderr, "max of max  %9.3f   %9.3f   %9.3f\n",
+				vals[0], vals[1], vals[2]);
+
 
 if (to_gray) {
 	foo = fimg_desaturate(&accu, &accu, 0);
@@ -156,6 +185,8 @@ if (verbosity) {
 				vals[4], vals[5], vals[5]-vals[4]);
 	}
 
+fimg_destroy(&accu);	fimg_destroy(&temp);
+
 return 0;
 }
 /* --------------------------------------------------------------------- */