int compression = getCompression();
// Attempt to get decompressor and color converted from the read param
TIFFColorConverter colorConverter = null;
if (imageReadParam instanceof TIFFImageReadParam) {
TIFFImageReadParam tparam =
(TIFFImageReadParam)imageReadParam;
this.decompressor = tparam.getTIFFDecompressor();
colorConverter = tparam.getColorConverter();