diff --git a/chromakey/chromakey.m b/chromakey/chromakey.m
index 1184ceb..f874783 100644
--- a/chromakey/chromakey.m
+++ b/chromakey/chromakey.m
@@ -53,10 +53,10 @@ figure;
 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');
+imwrite(intermediate, sprintf('%s.intermediate.png',prj_name),'png','alpha', matte);
+imwrite(edges, sprintf('%s.edges.png',prj_name),'png');
+imwrite(final, sprintf('%s.final.png',prj_name),'png','alpha', matte);
+imwrite(matte, sprintf('%s.alpha.png',prj_name),'png');
 
 function mask = mask_clip_above(mask_in, thresh)
 		k = mask_in < thresh;