diff --git a/.gitignore b/.gitignore
index c48c00b70..6e7866f9f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -38,3 +38,8 @@ capture_RPiHQ
 keogram
 startrails
 sunwait
+
+# misc
+.vscode/configurationCache.log
+.vscode/targets.log
+.vscode/dryrun.log
diff --git a/src/keogram.cpp b/src/keogram.cpp
index 759c277b9..d91b16a35 100644
--- a/src/keogram.cpp
+++ b/src/keogram.cpp
@@ -198,6 +198,8 @@ void keogram_worker(int thread_num,
 				// expand ?
 				if (cf->img_expand) {
 					cf->num_img_expand = std::max(1, (int) (imagesrc.cols / (float) nfiles));
+					if (((float)(cf->num_img_expand * nfiles) / imagesrc.cols) < 0.8) // minimal size 0.8 * imagesrc.cols 
+						cf->num_img_expand++;
 				}
 				// channel_info ?
 				if (cf->channel_info) {