Convert JPEG2000 to PNG

The JDeli Java image conversion library comes with JPEG2000 support makes it very easy to convert JPEG2000 to PNG image files in Java and other languages/scripts.

To run the code examples you will need to download the JDeli jar:

Download JDeli

Convert JPEG2000 to PNG in one line of code

The JDeli.convert() methods allow you to save JPEG2000 as PNG in just ONE line of code!

Using File

JDeli.convert(File inFile, File outFile);
JDeli.convert(File inFile, EncoderOptions encoderOptions, File outfile);
JDeli.convert(File inFile, File outfile, ImageProcessingOps imageProcessingOps);

Using InputStream and OutputStream

JDeli.convert(InputStream inputStream, OutputStream outputStream, "png");
JDeli.convert(InputStream inputStream, EncoderOptions encoderOptions, OutputStream outputStream);
JDeli.convert(InputStream inputStream, OutputStream outputStream, ImageProcessingOps imageProcessingOps);

Using byte[]

byte[] outputData = JDeli.convert(byte[] inputData, "png");
byte[] outputData = JDeli.convert(byte[] inputData, EncoderOptions encoderOptions);
byte[] outputData = JDeli.convert(byte[] inputData, "png", ImageProcessingOps imageProcessingOps);

Batch convert JPEG2000 to PNG from command line

Change image formats from command line or bash, bat, and powershell scripts. This method can also be used to invoke JDeli from any programming language that allows you to create a child process.

java -jar jdeli.jar --convert png "inputFileOrDir" "outputDir"

How to convert from JPEG2000 into PNG in Java as separate steps

Sometimes there is a requirement to convert between formats as separate steps. JDeli also allows the image to be read in as a BufferedImage and then written out later.

1. Read JPEG2000 image into Java

   BufferedImage bufferedImage = JDeli.read(new File("jpxImageFile.jpx"));  
   

2. Process image if needed (scale, sharpen, lighten, watermark, etc)

   bufferedImage = operations.apply(BufferedImage bufferedImage); // Optional
   

3. Write out BufferedImage as PNG image file

   JDeli.write(bufferedImage, "png", new File("pngImageFile.png"));
   

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