Update app.py

app.py

@@ -180,6 +180,7 @@ if __name__ == "__main__":
                 dict = dict['background'].convert("RGB").resize((384, 512))
                 dict = np.array(dict)
                 dict = cv2.cvtColor(dict, cv2.COLOR_RGB2BGR)
+                dict = dict.astype(np.uint8)
 
                 #img_output
                 img_cv = rearrange(x_checked_image_torch[0], 'c h w -> h w c').cpu().numpy()