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Problem reading JPEG image using ImageIO.read(File file)

Answer 1

+4 A:

Your image "Color Model" is CMYK, JPEGImageReader (the inner class that reads your file) reads only RGB Color Model.

If you insist on reading CMYK images, then you will need to convert them, try this code.

UPDATE

Read a CMYK image into RGB BufferedImage.

    File f = new File("/path/imagefile.jpg");

    //Find a suitable ImageReader
    Iterator readers = ImageIO.getImageReadersByFormatName("JPEG");
    ImageReader reader = null;
    while(readers.hasNext()) {
        reader = (ImageReader)readers.next();
        if(reader.canReadRaster()) {
            break;
        }
    }

    //Stream the image file (the original CMYK image)
    ImageInputStream input =   ImageIO.createImageInputStream(f); 
    reader.setInput(input); 

    //Read the image raster
    Raster raster = reader.readRaster(0, null); 

    //Create a new RGB image
    BufferedImage bi = new BufferedImage(raster.getWidth(), raster.getHeight(), 
    BufferedImage.TYPE_4BYTE_ABGR); 

    //Fill the new image with the old raster
    bi.getRaster().setRect(raster);

medopal 2010-03-09 12:01:09

Excellent, I will give it a try. Will it work for RGB images as well, or will I need to detect the type somehow?

Malakim 2010-03-09 12:40:44

You will find many ways to detect the color model, my preferred is using JPEGImageReader, if it throws `Unsupported Image Type` exception then its most probably CMYK.

medopal 2010-03-09 12:47:18

This works well enough, however, the colors gets all messed up. See the new image I've attached to the question. Do you have any advice regarding this?Thanks!

Malakim 2010-03-09 18:30:25

Yea, the color bleed is usual. Maybe you should try to use Javas `ColorConvertOp`, but not sure if it will help either. There is many ways of converting from one color model to another if thats your interest. I only gave the simplest one. If its a one time image, i would say just save it to RGB model in a professional image editing software.

medopal 2010-03-10 07:10:05

OK, problem is I don't have control over what images the users will upload. So I guess I'll need to look deeper into the color model conversions to support any JPEG's the users might throw at the application.Thank you so much for the help.

Malakim 2010-03-10 07:31:37

in that case you should make a function to check the image model before processing it. Check this http://forums.sun.com/thread.jspa?threadID=5391316 good luck :)

medopal 2010-03-10 07:56:16

+1 Thanks for the solution. Now work on color model conversion.

torak 2010-04-13 18:14:02

Answer 2

A:

You might also want to check this link: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4799903

There is a comment that shows how to convert from CMYK to RGB.

raymi 2010-04-07 07:45:42

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Problem reading JPEG image using ImageIO.read(File file)

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