diff --git a/floatimg.h b/floatimg.h
index 15fb0cd3..199ff818 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -3,7 +3,7 @@
  *			ugly code from tTh
  */
 
-#define		FIMG_VERSION	109
+#define		FIMG_VERSION	110
 
 /*
  *	in memory descriptor
@@ -182,6 +182,8 @@ int   fimg_save_as_png(FloatImg *src, char *outname, int flags);
 int   fimg_test_pattern(FloatImg *fimg, int type, double dval);
 int   fimg_draw_something(FloatImg *fimg);
 
+/*	file is 'funcs/utils.c'		*/
+void fimg_print_minmax(float minmax[6], char *titre);
 int parse_WxH(char *str, int *pw, int *ph);
 int parse_double(char *str, double *dptr);
 int format_from_extension(char *fname);
diff --git a/funcs/utils.c b/funcs/utils.c
index 32a9a1de..78aa0c1b 100644
--- a/funcs/utils.c
+++ b/funcs/utils.c
@@ -7,6 +7,16 @@
 
 extern int verbosity;		/* must be declared around main() */
 
+/* --------------------------------------------------------------------- */
+void fimg_print_minmax(float minmax[6], char *titre)
+{
+
+fprintf(stderr, "\t\tminmax %s\n", titre);
+fprintf(stderr, "red\t\t%10f   %10f\n",   minmax[0], minmax[1]);
+fprintf(stderr, "green\t\t%10f   %10f\n", minmax[2], minmax[3]);
+fprintf(stderr, "blue\t\t%10f   %10f\n",  minmax[4], minmax[5]);
+
+}
 /* --------------------------------------------------------------------- */
 int parse_WxH(char *str, int *pw, int *ph)
 {