Gábor Stefanik created PDFBOX-4830:
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Summary: Grayscale images inserted using
LosslessFactory.createFromImage() have wrong gamma correction (too bright)
Key: PDFBOX-4830
URL: https://issues.apache.org/jira/browse/PDFBOX-4830
Project: PDFBox
Issue Type: Bug
Components: PDModel
Affects Versions: 2.0.19
Reporter: Gábor Stefanik
When I try to insert a grayscale image into a PDF using
LosslessFactory.createFromImage(), the image in the PDF ends up too bright due
to an incorrect gamma correction being applied. The issue seems to be a
difference between Java's linear grayscale color space (gamma = 1), and the
DeviceGray color space in PDF (which isn't linear, but apparently has the same
gamma correction as DeviceRGB). The problem doesn't occur with JPEGFactory.
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