我在Node.js应用程序中使用tfjs-node来加载模型和预测结果。它提供了不错的结果，但对于某些图像，显示了以下错误：

Error when checking : expected input to have shape [null,300,300,3] but got array with shape [1,300,300,4].

加载和预测结果的代码：

const loadModel = async (imagePath) => {
  const image = fs.readFileSync(imagePath);
  let tensor = tf.node.decodeImage(image);

  const resizedImage = tensor.resizeNearestNeighbor([300, 300]);
  const batchedImage = resizedImage.expandDims(0);
  const input = batchedImage.toFloat().div(tf.scalar(255));

  const model = await tf.loadLayersModel(
    process.env.ML_MODEL_PATH || "file://./ml-model/model.json"
  );

  let predictions = await model.predict(input).data();
  predictions = Array.from(predictions);
};

怎么解决？谢谢。