Java 如何从JPEG图像无损创建金字塔平铺TIFF
我需要创建平铺金字塔TIFF文件,使用JPEG压缩平铺,使用无损JPEG操作(即在jpegtran中裁剪)从大型JPEG图像创建平铺金字塔TIFF文件。有没有工具或java代码来执行这样的操作 目前,我正在使用Java代码创建平铺金字塔TIFF,但它是以有损的方式进行的:Java 如何从JPEG图像无损创建金字塔平铺TIFF,java,compression,jpeg,tiff,lossless,Java,Compression,Jpeg,Tiff,Lossless,我需要创建平铺金字塔TIFF文件,使用JPEG压缩平铺,使用无损JPEG操作(即在jpegtran中裁剪)从大型JPEG图像创建平铺金字塔TIFF文件。有没有工具或java代码来执行这样的操作 目前,我正在使用Java代码创建平铺金字塔TIFF,但它是以有损的方式进行的: public static void writeTiff(RenderedOp src, File dstFile, float jpegQuality, int tileSize, int pyramid, String i
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();
}
}
public static void writeTiff(renderop src、File dstFile、float jpegQuality、int tileSize、int棱锥体、字符串插值)引发IOException{
dstFile.getParentFile().mkdirs();
TIFFImageWriterSpi imageWriterSpi=新的TIFFImageWriterSpi();
TIFFImageWriter imageWriter=(TIFFImageWriter)imageWriterSpi.createWriterInstance();
ImageOutputStream out=新文件ImageOutputStream(dstFile);
试一试{
imageWriter.setOutput(输出);
imageWriter.prepareWriteSequence(空);
BuffereImage img=null;
对于(inti=0;i0&(img.getWidth()>tileSize | | img.getHeight()>tileSize)){
imageWriteParam.setTilingMode(imageWriteParam.MODE_显式);
设置平铺(tileSize,tileSize,0,0);
}
如果(JPEG质量>0){
imageWriteParam.setCompressionMode(imageWriteParam.MODE_显式);
设置压缩类型(“JPEG”);
设置压缩质量(JPEG质量);
}
imageWriter.writeToSequence(新的IIOImage(img,null,null),imageWriteParam);
}
imageWriter.endWriteSequence();
}最后{
out.close();
}
}
在命令行中工作得很好,但我看到它也有一个功能。谢谢你的提示,我会查看它的