Update app.py

app.py

@@ -60,7 +60,7 @@ async def predict_fingerprint_api(file: UploadFile = File(...)):
     try:
         contents = await file.read()
         print(f"contenido:\n{contents}")
-        image = Image.open(BytesIO(contents))
+        image = Image.open(BytesIO(contents)).convert('L')
         print(f"imagen:\n{image}")
         fingerprint_type = predict_fingerprint(image)