</span></dt>
<dd><code>currRow</code> - The current row as an array of <code>byte</code>s
        of length at least <code>bytesPerRow + bytesPerPixel</code>.
        The pixel data starts at index <code>bytesPerPixel</code>;
        the initial <code>bytesPerPixel</code> bytes are zero.</dd>
<dd><code>prevRow</code> - The current row as an array of <code>byte</code>s
        The pixel data starts at index <code>bytesPerPixel</code>;
        the initial <code>bytesPerPixel</code> bytes are zero.</dd>
<dd><c