onnxruntime-inference-examples 安卓使用

有大佬知道这段代码的意思吗

const val DIM_BATCH_SIZE = 1;
const val DIM_PIXEL_SIZE = 3;
const val IMAGE_SIZE_X = 224;
const val IMAGE_SIZE_Y = 224;

fun preProcess(bitmap: Bitmap): FloatBuffer {
    val imgData = FloatBuffer.allocate(
            DIM_BATCH_SIZE
                    * DIM_PIXEL_SIZE
                    * IMAGE_SIZE_X
                    * IMAGE_SIZE_Y
    )
    imgData.rewind()
    val stride = IMAGE_SIZE_X * IMAGE_SIZE_Y
    val bmpData = IntArray(stride)
    bitmap.getPixels(bmpData, 0, bitmap.width, 0, 0, bitmap.width, bitmap.height)
    for (i in 0..IMAGE_SIZE_X - 1) {
        for (j in 0..IMAGE_SIZE_Y - 1) {
            val idx = IMAGE_SIZE_Y * i + j
            val pixelValue = bmpData[idx]
            imgData.put(idx, (((pixelValue shr 16 and 0xFF) / 255f - 0.485f) / 0.229f))
            imgData.put(idx + stride, (((pixelValue shr 8 and 0xFF) / 255f - 0.456f) / 0.224f))
            imgData.put(idx + stride * 2, (((pixelValue and 0xFF) / 255f - 0.406f) / 0.225f))
        }
    }

    imgData.rewind()
    return imgData
}

我想把const val IMAGE_SIZE_X = 224;
const val IMAGE_SIZE_Y = 224;的值改成48，因为这边模型提供的input size是48.

imgData.put这块要怎么修改呢，有大佬懂吗，而且感觉是什么都没有也能识别出来东西，是不是官方给的demo需要做修改

 
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