Update app.py

app.py

@@ -19,7 +19,7 @@ if img is not None:
           lbl = result.boxes.conf[i]
           boxes = result.boxes.xyxy[i]
           draw = ImageDraw.Draw(img)
-          draw.rectangle([boxes[0], boxes[1], boxes[2], boxes[3]], outline="white", width=5)
+          draw.rectangle([boxes[0], boxes[1], boxes[2], boxes[3]], outline="black", width=5)
           text_position = (boxes[0]+boxes[2])/2, boxes[1]-10
           draw.text(text_position, f'{cls} {lbl}', fill="red", font=font)