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https://issues.apache.org/jira/browse/PDFBOX-2123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tilman Hausherr resolved PDFBOX-2123.
-------------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
I commited a slightly modified version of your patch in rev 1601080, i.e. I
didn't exclude 1bit images that didn't have the default decode. I tested with
many images and didn't get any differences. The rendering times didn't improve
as much as with your example, but they did. Thanks!
> Optimize reading of 1-bit depth images in SampleImageReader
> -----------------------------------------------------------
>
> Key: PDFBOX-2123
> URL: https://issues.apache.org/jira/browse/PDFBOX-2123
> Project: PDFBox
> Issue Type: Improvement
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Petr Slaby
> Assignee: Tilman Hausherr
> Fix For: 2.0.0
>
> Attachments: 000008_test-scan 20121105144109807.pdf,
> SampledImageReader.java.patch
>
>
> Reading of 1-bit depth (black and white) images in SampleImageReader can be
> optimized. The attached patch reduces the time spent in
> SampleImageReader#getRGBImage() from 4 seconds to 1.8 second on my notebook
> with the attached PDF.
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