How to convert TIFF to JPEG/PNG in java

问题:

recently i'm facing problem when try to display an image file. Unfortunately, the image format is TIFF format which not supported by major web browser (as i know only Safari support this format). Due to certain constraint, i have to convert this format to others format that supported by major browser. However, it bring a lots of problem for me when i try to converting the format.

I had search through the web and although there been posted similar issue in this link How do I convert a TIF to PNG in Java?" but i can't have the result as it proposed..

Therefore i raise this Question again to wish that can have better explanation and guideline from you all..

There were few issue i'm faced during go through with the solution that proposed:

1) According to the answer that proposed by Jonathan Feinberg, it need to install JAI and JAI/ImageIO. However, after i installed both of them i still couldn't import the file in Netbean 7.2. NetBean 7.2 remain propose import default imageIO library.

2) when i'm using default ImageIO library Read method, it will return NULL value and i cannot continue to proceed.

3) I also tried others method such as convert TIFF file to BIN File by using BufferedOutputStream method but the result file is greater than 11 MB which is too large to load and end up loading failed.

 if (this.selectedDO != null) {
        String tempDO = this.selectedDO.DONo;
        String inPath = "J:\\" + tempDO + ".TIF";
        String otPath = "J:\\" + tempDO + ".bin";

        File opFile = new File(otPath);

        File inFile = new File(inPath);

        BufferedInputStream input = null;
        BufferedOutputStream output = null;
        try {
            input = new BufferedInputStream(new FileInputStream(inPath), DEFAULT_BUFFER_SIZE);
            output = new BufferedOutputStream(new FileOutputStream(otPath), DEFAULT_BUFFER_SIZE);

            byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
            int length;
            while ((length = input.read(buffer)) > 0) {
                output.write(buffer, 0, length);
            }

        } finally {
            try {
                output.flush();
                output.close();
                input.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

Hence, hope that can get help and advise from you all so that i can convert TIFF format to other format such as JPEG/PNG.

回答1:

Had gone through some study and testing, found a method to convert TIFF to JPEG and sorry for pending so long only uploaded this answer.

        SeekableStream s = new FileSeekableStream(inFile);
        TIFFDecodeParam param = null;
        ImageDecoder dec = ImageCodec.createImageDecoder("tiff", s, param);
        RenderedImage op = dec.decodeAsRenderedImage(0);

        FileOutputStream fos = new FileOutputStream(otPath);
        JPEGEncodeParam jpgparam = new JPEGEncodeParam();
        jpgparam.setQuality(67);
        ImageEncoder en = ImageCodec.createImageEncoder("jpeg", fos, jpgparam);
        en.encode(op);
        fos.flush();
        fos.close();

p/s: otPath is meant to the path that you would like to store your JPEG image. For example: "C:/image/abc.JPG"; inFile is the input file which is the TIFF file

At least this method is workable to me. If there is any other better method, kindly share along with us.

Thanks and Regards,

回答2:

1. Add dependency

    <dependency>
    <groupId>com.github.jai-imageio</groupId>
    <artifactId>jai-imageio-core</artifactId>
    <version>1.3.1</version> </dependency>
   

https://mvnrepository.com/artifact/com.github.jai-imageio/jai-imageio-core

https://mvnrepository.com/artifact/com.github.jai-imageio/jai-imageio-core/1.3.1

2. Coding

   final BufferedImage tif = ImageIO.read(new File("test.tif"));
   ImageIO.write(tif, "png", new File("test.png"));
   

回答3:

In case of many pages, working following:

1. add dependency:

   <dependency>
       <groupId>com.github.jai-imageio</groupId>
       <artifactId>jai-imageio-core</artifactId>
       <version>1.4.0</version>
   </dependency>
   

2. use following Java8 code

   public void convertTiffToPng(File file) {
   try {
       try (InputStream is = new FileInputStream(file)) {
           try (ImageInputStream imageInputStream = ImageIO.createImageInputStream(is)) {
               Iterator<ImageReader> iterator = ImageIO.getImageReaders(imageInputStream);
               if (iterator == null || !iterator.hasNext()) {
                   throw new RuntimeException("Image file format not supported by ImageIO: " + file.getAbsolutePath());
               }
   
   
               // We are just looking for the first reader compatible:
               ImageReader reader = iterator.next();
               reader.setInput(imageInputStream);
   
               int numPage = reader.getNumImages(true);
   
               // it uses to put new png files, close to original example n0_.tiff will be in /png/n0_0.png
               String name = FilenameUtils.getBaseName(file.getAbsolutePath()); 
               String parentFolder = file.getParentFile().getAbsolutePath();
   
               IntStream.range(0, numPage).forEach(v -> {
                   try {
                       final BufferedImage tiff = reader.read(v);
                       ImageIO.write(tiff, "png", new File(parentFolder + "/png/" + name + v + ".png"));
                   } catch (IOException e) {
                       e.printStackTrace();
                   }
               });
           }
       }
   } catch (IOException e) {
       e.printStackTrace();
   }
   }
   

回答4:

First, take a look to What is the best java image processing library/approach?. For your code you can use

javax.imageio.ImageIO.write(im, type, represFile);

like you can see in write an image to file example.

回答5:

You could try this great Java library on Github that provides many utilities for handling, opening, and writing .tiff files.

A simple example from that Git showng how to convert TIFF to JPEG:

TiffConverter.ConverterOptions options = new TiffConverter.ConverterOptions();
//Set to true if you want use java exception mechanism
options.throwExceptions = false; 
//Available 128Mb for work
options.availableMemory = 128 * 1024 * 1024; 
//Number of tiff directory to convert;
options.readTiffDirectory = 1;         
//Convert to JPEG
TiffConverter.convertTiffJpg("in.tif", "out.jpg", options, progressListener);