Update app.py

app.py

@@ -116,7 +116,10 @@ def homography_all_detectors(flat_file, persp_file, json_file):
         result_rgb = cv2.cvtColor(persp_debug, cv2.COLOR_BGR2RGB)
 
         # Save result for download
-        file_name = f"result_{method.lower()}.png"
+        base_name = os.path.splitext(os.path.basename(persp_file))[0]
+
+        # Save with same name + detector
+        file_name = f"{base_name}_{method.lower()}.png"
         cv2.imwrite(file_name, cv2.cvtColor(result_rgb, cv2.COLOR_RGB2BGR))
 
         gallery_images.append((result_rgb, f"{method} Result"))