Update model.py

model.py

@@ -45,6 +45,7 @@ def preprocess_pytorch(img, size=224):
     return transform(img).unsqueeze(0)
 
 def preprocess_keras(img, crop_name):
+    img = img.convert("RGB")
     size = KERAS_INPUT_SIZES.get(crop_name, 224)
     img = img.resize((size, size))
     arr = np.array(img).astype("float32") / 255.0