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https://issues.apache.org/jira/browse/PDFBOX-3981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16220659#comment-16220659
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austinchen commented on PDFBOX-3981:
------------------------------------
by the way, when the code run in below exception
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);
}
it still got error when execute "raster = reader.readRaster(0, null);" , I
don't know why, but when I change to code to below code, it won't got error,
but still lost the CMYK image:
catch (Exception 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
reader.setInput(iis);
raster = reader.readRaster(0, null);
}
> 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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