如何以無損方式從JPEG圖像創建金字塔平鋪TIFF

Question

我需要使用無損jpeg操作（即在jpegtran中裁剪）從大JPEG圖像中創建具有JPEG壓縮圖塊的平鋪金字塔TIFF文件。是否有任何工具或Java代碼執行此類操作？

目前我使用我的Java代碼來創建瓷磚金字塔TIFF，但這樣做有損方式：

public static void writeTiff(RenderedOp src, File dstFile, float jpegQuality, int tileSize, int pyramid, String interpolation) throws IOException { 
    dstFile.getParentFile().mkdirs(); 
    TIFFImageWriterSpi imageWriterSpi = new TIFFImageWriterSpi(); 
    TIFFImageWriter imageWriter = (TIFFImageWriter)imageWriterSpi.createWriterInstance(); 
    ImageOutputStream out = new FileImageOutputStream(dstFile); 
    try { 
     imageWriter.setOutput(out); 
     imageWriter.prepareWriteSequence(null); 
     BufferedImage img = null; 
     for(int i=0; i<pyramid; i++) { 
      img = img==null ? src.getAsBufferedImage() : JAIUtils.scale(img, 0.5F, interpolation).getAsBufferedImage(); 
      TIFFImageWriteParam imageWriteParam = (TIFFImageWriteParam)imageWriter.getDefaultWriteParam(); 
      if (tileSize>0 && (img.getWidth()>tileSize || img.getHeight()>tileSize)) { 
       imageWriteParam.setTilingMode(ImageWriteParam.MODE_EXPLICIT); 
       imageWriteParam.setTiling(tileSize, tileSize, 0, 0); 
      } 
      if (jpegQuality > 0) { 
       imageWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); 
       imageWriteParam.setCompressionType("JPEG"); 
       imageWriteParam.setCompressionQuality(jpegQuality); 
      } 
      imageWriter.writeToSequence(new IIOImage(img, null, null), imageWriteParam); 
     } 
     imageWriter.endWriteSequence(); 
    } finally { 
     out.close(); 
    } 
} 

Answer 1

Ossim作品以及通過命令行，但我看到它有一個JNI binding，太。