Wrong JPEG color space

[azhuchkov]

Apparently TwelveMonkeys and JDK have exchanged seats: the com.twelvemonkeys.imageio.plugins.jpeg.JPEGImageReader confuses JPEG color space while JDK produces adequate result.

The test:

val img = ImageIO.read(new File("/home/andrey/Downloads/tailand.jpg"))
ImageIO.write(img, "JPG", new File("/tmp/thumbnail.jpg"))

Original image (link):

Result:

java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)

TwelveMonkeys: 3.0-rc5

[haraldk]

Hi Andrey,

Thank you for reporting and providing a test sample. I can reproduce the problem here as well.

The reason why my reader is confused, is because the JPEG file has non-standard component id's (0, 1, 2, instead of the standard 1, 2, 3) and does not use chroma subsampling.

However, it does have a valid JFIF segment, so it should still be considered to be in YCbCr and not RGB.

I'll see what I can do about that. :-)

Harald K

[haraldk]

Hi again,

Can you please test a build of the latest snapshot? I believe this behavior was already changed as part of the fix for issue #38, and should fix your problem.

Update: I did a quick test and it seems to work fine, so I'm closing this as duplicate.

Harald K