Update app.py

app.py

@@ -1215,7 +1215,7 @@ def merge_overlapping_boxes(detections, iou_threshold):
                 merged_x1 = min(merged_x1, other_box[0])
                 merged_y1 = min(merged_y1, other_box[1])
                 merged_x2 = max(merged_x2, other_box[2])
-                merged_y2 = max(other_box[3], other_box[3])
+                merged_y2 = max(merged_y2, other_box[3])
                 is_merged[j] = True
         merged_detections.append({
             'coords': (merged_x1, merged_y1, merged_x2, merged_y2),