如何在 Java 中将 TIF 转换为 PNG？
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How do I convert a TIF to PNG in Java?
提问by James McMahon
Under Java what is the best way to go about converting an TIF file to a PNG?
在 Java 下，将 TIF 文件转换为 PNG 的最佳方法是什么？
Simplicity is preferable, but if the simplest way is to use a third party library then I would consider that solution.
简单是可取的，但如果最简单的方法是使用第三方库，那么我会考虑该解决方案。
采纳答案by Jonathan Feinberg
First, install JAI. Then install JAI/ImageIO. Then do
首先，安装JAI。然后安装JAI/ImageIO。然后做
public static void main(final String[] args) throws Exception
{
final BufferedImage tif = ImageIO.read(new File("test.tif"));
ImageIO.write(tif, "png", new File("test.png"));
}
回答by MLefrancois
Java advanced imaging APi is a good library for image manipulations
Java高级成像API是一个很好的图像处理库
回答by giladbu
Use imageMagicjava libraries like im4java, their performance and quality is much better then JAI
使用像im4java这样的imageMagicjava 库，它们的性能和质量比 JAI 好得多
for example:
例如：
import org.im4java.core.ConvertCmd;
import org.im4java.core.IMOperation;
public static void convertTifToPng(File inputImage, File outputImage){
IMOperation op = new IMOperation();
op.addImage(); //place holder for input file
op.addImage(); //place holder for output file
ConvertCmd convert = new ConvertCmd();
convert.run(op, new Object[]{inputImage.getAbsolutePath(), outputImage.getAbsolutePath()});
}
maven dependency for im4java is
im4java 的 maven 依赖项是
<dependency>
<groupId>im4java</groupId>
<artifactId>im4java</artifactId>
<version>0.98.0</version>
</dependency>
回答by wsx22
Download JIMI Software Development Kit jimi1_0.zip and set JimiProClasses.zip to your classpath
下载 JIMI Software Development Kit jimi1_0.zip 并将 JimiProClasses.zip 设置为您的类路径
JIMI is older java image library, but it is easy to use and there is no platform dependent code (no native executables, can use it like standard jar)
JIMI是较老的java镜像库，但使用方便，没有平台依赖代码（没有原生可执行文件，可以像标准jar一样使用）
import java.awt.Image;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import com.sun.jimi.core.Jimi;
public class JIMIImageConverter {
public static byte[] convert(byte[] inBytes, String inMimeType, String outMimeType) throws Exception{
Image rawImage = Jimi.getImage(new ByteArrayInputStream(inBytes), inMimeType);
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
Jimi.putImage(outMimeType, rawImage, outputStream);
return outputStream.toByteArray();
}
}
where inMimeType and outMimeType are graphics formats mimetypes
其中 inMimeType 和 outMimeType 是图形格式 mimetypes
回答by hardcess
maybe you can use this code, works for me
也许你可以使用这个代码，对我有用
import java.awt.Color;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import java.io.File;
import java.io.IOException;
import javax.media.jai.JAI;
import javax.media.jai.RenderedOp;
import com.sun.media.jai.codec.FileSeekableStream;
import com.sun.media.jai.codec.ImageCodec;
import com.sun.media.jai.codec.ImageDecoder;
import com.sun.media.jai.codec.SeekableStream;
public class ImageConvert {
public static RenderedImage[] readMultiPageTiff(String fileName)throws IOException{
File file = new File(fileName);
SeekableStream seekableStream = new FileSeekableStream(file);
ImageDecoder decoder = ImageCodec.createImageDecoder("tiff", seekableStream, null);
int numPages = decoder.getNumPages();
RenderedImage image[]= new RenderedImage[numPages];
int count = 0;
for(int i=0;i<decoder.getNumPages();i++){
image[i] = decoder.decodeAsRenderedImage(i);
count++;
}
String newFolderName;
String s3 = fileName;
String [] temp = null;
temp = s3.split("\.");
int j;
j = 0;
do{
newFolderName = temp[j];
String spoonFeeding = newFolderName;
File f = new File(spoonFeeding);
f.mkdirs();
j++;
}while (j<1);
for (int i = 0; i < count; i++) {
RenderedImage page = decoder.decodeAsRenderedImage(i);
File fileObj = new File(newFolderName+"/" + (i+1) + ".png");
System.out.println("Saving " + fileObj.getCanonicalPath());
ParameterBlock parBlock = new ParameterBlock();
parBlock.addSource(page);
parBlock.add(fileObj.toString());
parBlock.add("png");
RenderedOp renderedOp = JAI.create("filestore",parBlock);
renderedOp.dispose();
}
return image;
}
}
