[jira] [Closed] (PDFBOX-3981) It won't catch the exception when read the CMYK image in PDF for DCTFilter.class

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-3981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr closed PDFBOX-3981.
-----------------------------------
    Resolution: Incomplete

Ok, I'm closing this for now. You can still comment. You can also try that special CMYK setting mentioned on 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
>
> 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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