diff --git a/floatimg.h b/floatimg.h
index 57a8dc7..de54235 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -4,7 +4,7 @@
  *	http://la.buvette.org/photos/cumul
  */
 
-#define		FIMG_VERSION	147
+#define		FIMG_VERSION	148
 
 /*
  *	in memory descriptor
diff --git a/lib/operators.c b/lib/operators.c
index 14a5056..9e57bb3 100644
--- a/lib/operators.c
+++ b/lib/operators.c
@@ -175,11 +175,11 @@ if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type ||
 nbiter = a->width * a->height;
 
 for (idx=0; idx<nbiter; idx++) {
-	if (a->R[idx] > b->R[idx])	d->R[idx] = a->R[idx];
+	if (a->R[idx] < b->R[idx])	d->R[idx] = a->R[idx];
 	else				d->R[idx] = b->R[idx];
-	if (a->G[idx] > b->G[idx])	d->G[idx] = a->G[idx];
+	if (a->G[idx] < b->G[idx])	d->G[idx] = a->G[idx];
 	else				d->G[idx] = b->G[idx];
-	if (a->B[idx] > b->B[idx])	d->B[idx] = a->B[idx];
+	if (a->B[idx] < b->B[idx])	d->B[idx] = a->B[idx];
 	else				d->B[idx] = b->B[idx];
 	}
 
@@ -203,11 +203,11 @@ if (FIMG_TYPE_RGB != a->type || FIMG_TYPE_RGB != b->type ||
 nbiter = a->width * a->height ;
 
 for (idx=0; idx<nbiter; idx++) {
-	if (a->R[idx] < b->R[idx])	d->R[idx] = a->R[idx];
+	if (a->R[idx] > b->R[idx])	d->R[idx] = a->R[idx];
 	else				d->R[idx] = b->R[idx];
-	if (a->G[idx] < b->G[idx])	d->G[idx] = a->G[idx];
+	if (a->G[idx] > b->G[idx])	d->G[idx] = a->G[idx];
 	else				d->G[idx] = b->G[idx];
-	if (a->B[idx] < b->B[idx])	d->B[idx] = a->B[idx];
+	if (a->B[idx] > b->B[idx])	d->B[idx] = a->B[idx];
 	else				d->B[idx] = b->B[idx];
 	}