diff --git a/chromakey/chromakey.m b/chromakey/chromakey.m
index 21bd38a..58132fd 100644
--- a/chromakey/chromakey.m
+++ b/chromakey/chromakey.m
@@ -56,6 +56,7 @@ final = max(0, intermediate - k_ds_matte.*edges.*ref_rgb);
 imshow(final); title("final")
 
 imwrite(intermediate, 'intermediate.png','png','alpha', matte);
+imwrite(edges, 'edges.png','png');
 imwrite(final, 'final.png','png','alpha', matte);
 imwrite(matte, 'alpha.png','png');