如何从整数数组创建16位位图？

Question

我有一个整数数组，它将仅包含可以用16位表示的值（值在0-65535范围内）。整数数组是添加了几个8位图像，以使每个图像的所有左上像素的总和是整数数组的第一个元素。我需要在pixelformat.format16bppgrayscale格式中创建bitmap对象，但是我不确定该怎么做。我当前的代码在尝试将整数复制到intptr中时产生system.accessviolationException。

/// <summary>
///     Converts image int data to bitmap image by creating a compatible bitmap and copying
///     the data. This assumes the int array is a 16 bit image.
/// </summary>
/// <param name="image">Image int data.</param>
/// <param name="width">Width of the image.</param>
/// <param name="height">Height of the image.</param>
/// <param name="pixelFormat">Pixel format of the image.</param>
/// <returns></returns>
public static Bitmap ToBitmap(this int[] image, int width, int height, PixelFormat pixelFormat)
{
    // Create a compatible bitmap
    var bitmap = new Bitmap(width, height, PixelFormat.Format16bppGrayScale);

    // Copy the bits
    BitmapData bmData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, bitmap.PixelFormat);
    IntPtr pNative = bmData.Scan0;
    Marshal.Copy(image, 0, pNative, width * height);
    bitmap.UnlockBits(bmData);

    // Clone into desired format
    Bitmap clone = bitmap.Clone(new Rectangle(0, 0, width, height), pixelFormat);
    bitmap.Dispose();
    return clone;
}