Update app.py

app.py

@@ -233,7 +233,7 @@ with gr.Blocks(theme='bethecloud/storj_theme') as iface:
         with gr.Column():
             obj_img = gr.Image(label="Object Image", type="numpy", height=300)
         with gr.Column():
-            gr.Image(label="Mask Image", type="numpy", height=300)
+            mask_img = gr.Image(label="Mask Image", type="numpy", height=300)
     with gr.Row():
         with gr.Column():
             method = gr.Radio(["Poisson", "Mixed Gradient", "Laplacian"], label="Blending Method", value="Poisson")