StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POJPEG image with wrong colors
text
Body
copied!<p>I have a method that reads images, converts them (size, format) and writes them back. This always worked very well, but now I've come across some JPEG images (from a Press Agency) that obviously contain some meta-data (IPTC). When converting those images, the colors are all wrong. My first guess was, that those are CMYK images but they are not.</p> <p>The problem must come from the reading, because it doesn't matter whether I convert the image to a smaller JPEG or a PNG, it always looks the same.</p> <p>At first, I used <code>ImageIO.read()</code> to read the image. I now get the actual <code>ImageReader</code> via <code>ImageIO.getImageReadersByMIMEType()</code> and tried to tell the reader to ignore meta data by setting the <code>ignoreMetadata</code> parameter of <code>ImageReader#setInput(Object input, boolean seekForwardOnly, boolean ignoreMetadata)</code> but had no success.</p> <p>Then I created a version of the image without the metadata (using Fireworks). That image is converted correctly.</p> <p>The only difference I could find out, is, that with the not-working image the value of the reader's variable <code>colorSpaceCode</code> is <strong>2</strong>, whilest with the working image, the value is <strong>3</strong>. There's also an <code>outColorSpaceCode</code> which is <strong>2</strong> for both images.</p> <p>As the <a href="http://www.docjar.com/html/api/com/sun/imageio/plugins/jpeg/JPEGImageReader.java.html" rel="nofollow noreferrer">source comment of the reader</a> only says <em>Set by setImageData native code callback. A modified IJG+NIFTY colorspace code</em> I'm really stuck now. So any help would be much appreciated.</p> <p>You can get original image (~3 MB) by going <a href="https://docs.google.com/leaf?id=0B91_UJs94xyTYTU4MTYxZDQtM2FlYy00OGVlLTkzMGQtYThhNzI5N2M0YmRl" rel="nofollow noreferrer">here</a> and clicking download. The left image below shows what I get from the original image, the right shows what it should look like. </p> <p><img src="https://i.stack.imgur.com/4TYAc.jpg" alt="wrong colors"> <img src="https://i.stack.imgur.com/6vy74.jpg" alt="correct colors (after removing metadata)"></p>

Querying!

Guidance

An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload