将BufferedImages保存为TIFF

Question

我正在尝试将BufferedImage保存为TIFF。这样可以正常工作，但每TIFF花费的时间太长，最长可达5秒。 5秒可能听起来不是很多，但如果你想保存多达20张图像太长了。

这是我的代码：

public void convertToTif() throws ConvertionFailedException {
final int dpi = 300;

try {
    ImageOutputStream ios = null;
    TIFFImageWriterSpi tiffspi = new TIFFImageWriterSpi();

    ImageWriter writer = tiffspi.createWriterInstance();

    // setup writer
    ios = ImageIO.createImageOutputStream(this.tifFile);

    writer.setOutput(ios);

    BufferedImage tiffImage = create1BitTif(this.imageToConvert);

    // get new Metadata
    ImageTypeSpecifier imageType = ImageTypeSpecifier.createFromBufferedImageType(tiffImage.getType());
    IIOMetadata imageMetadata = writer.getDefaultImageMetadata(imageType, null);

    TIFFDirectory dir = TIFFDirectory.createFromMetadata(imageMetadata);

    BaselineTIFFTagSet base = BaselineTIFFTagSet.getInstance();
    TIFFTag tagXRes = base.getTag(BaselineTIFFTagSet.TAG_X_RESOLUTION);
    TIFFTag tagYRes = base.getTag(BaselineTIFFTagSet.TAG_Y_RESOLUTION);
    TIFFTag tagNewSubfile = base.getTag(BaselineTIFFTagSet.TAG_NEW_SUBFILE_TYPE);
    TIFFTag tagBitsPerSample = base.getTag(BaselineTIFFTagSet.TAG_BITS_PER_SAMPLE);
    TIFFTag tagResolutionUnit = base.getTag(BaselineTIFFTagSet.TAG_RESOLUTION_UNIT);

    // set X DPI
    long[][] X_DPI = new long[][] { { dpi, 1 } };
    TIFFField xDPI = new TIFFField(tagXRes, TIFFTag.TIFF_RATIONAL, 1, X_DPI);
    // set Y DPI
    long[][] Y_DPI = new long[][] { { dpi, 1 } };
    TIFFField yDPI = new TIFFField(tagYRes, TIFFTag.TIFF_RATIONAL, 1, Y_DPI);

    // setzt Photometric von BlackIsZero auf WhiteIsZero
    TIFFField photometricInterpretationField = new TIFFField(base.getTag(BaselineTIFFTagSet.TAG_PHOTOMETRIC_INTERPRETATION), BaselineTIFFTagSet.PHOTOMETRIC_INTERPRETATION_WHITE_IS_ZERO);

    // setzt NewSubfileType auf 0
    TIFFField newSubfile = new TIFFField(tagNewSubfile, 0);

    // setzt BitsPerSample auf 1
    TIFFField bitsPerSample = new TIFFField(tagBitsPerSample, 1);

    // setzt ResolutionUnit auf 2
    TIFFField resolutionUnit = new TIFFField(tagResolutionUnit, 2);

    dir.addTIFFField(xDPI);
    dir.addTIFFField(yDPI);
    dir.addTIFFField(photometricInterpretationField);
    dir.addTIFFField(newSubfile);
    dir.addTIFFField(bitsPerSample);
    dir.addTIFFField(resolutionUnit);

    TIFFImageWriteParam param = (TIFFImageWriteParam) writer.getDefaultWriteParam();
    param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
    param.setTIFFCompressor(new TIFFT6Compressor());
    param.setCompressionType("CCITT T.6");
    param.setCompressionQuality(0.0f);

    IIOMetadata streamMetadata = writer.getDefaultStreamMetadata(null);
    String tiffMetadataFormatName = streamMetadata.getNativeMetadataFormatName();
    IIOMetadataNode newTree = new IIOMetadataNode(tiffMetadataFormatName);

    // create little endian
    IIOMetadataNode endianNode = new IIOMetadataNode("ByteOrder");
    endianNode.setAttribute("value", "LITTLE_ENDIAN");

    newTree.appendChild(endianNode);
    streamMetadata.setFromTree(tiffMetadataFormatName, newTree);

    writer.prepareWriteSequence(streamMetadata);
    writer.writeToSequence(new IIOImage(tiffImage, null, dir.getAsMetadata()), param);

    ios.close();
} catch (IOException e) {
    throw new ConvertionFailedException(e);
}
}