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https://issues.apache.org/jira/browse/PDFBOX-3981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16220673#comment-16220673
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Tilman Hausherr commented on PDFBOX-3981:
-----------------------------------------
Thanks... could you please attach your PDF and/or tell what you were doing, and
post the stack trace of the exception you got?
Btw some troubles go away by using the twelvemonkeys imaging library. Also tell
if you have set set that KCMS property (
https://pdfbox.apache.org/2.0/getting-started.html )
> It won't catch the exception when read the CMYK image in PDF for
> DCTFilter.class
> --------------------------------------------------------------------------------
>
> Key: PDFBOX-3981
> URL: https://issues.apache.org/jira/browse/PDFBOX-3981
> Project: PDFBox
> Issue Type: Bug
> Affects Versions: 2.0.7
> Environment: Windows/Liunx
> Reporter: austinchen
> Labels: cmyk
> Fix For: 2.0.7
>
>
> In below code of DCTFilter.class, can't catch the IIOException because the
> right Exception is IOException.
> And when I change the code, in my testing, when I convert the PDF to image, I
> found the CMYK image will be lost in converted image, it's very strange when
> I set "String numChannels = '2'", I got positive result.
> {code}
> if ("3".equals(numChannels) || numChannels.isEmpty())
> {
> try
> {
> // I'd like to use ImageReader#readRaster but it is buggy
> and can't read RGB correctly
> BufferedImage image = reader.read(0);
> raster = image.getRaster();
> }
> catch (IIOException e)
> {
> // JAI can't read CMYK JPEGs using ImageReader#read or
> ImageIO.read but
> // fortunately ImageReader#readRaster isn't buggy when
> reading 4-channel files
> raster = reader.readRaster(0, null);
> }
> }
> {code}
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