Harry Dent created PDFBOX-4205:
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Summary: LosslessFactory alters image
Key: PDFBOX-4205
URL: https://issues.apache.org/jira/browse/PDFBOX-4205
Project: PDFBox
Issue Type: Bug
Affects Versions: 2.0.9, 2.0.8, 2.0.7
Environment: Ubuntu 16.04
Reporter: Harry Dent
Attachments: lossy.png, picture_of_text.png
The attached grayscale png becomes lighter when run through the following code
snippet:
{code:java}
BufferedImage image = ImageIO.read(new File("picture_of_text.png"));
PDImageXObject xObject = LosslessFactory.createFromImage(new PDDocument(),
image);
BufferedImage lossy = xObject.getImage();
ImageIO.write(lossy, "png", new File("lossy.png"));
{code}
The difference is most easy to spot by looking at the "S" in "41st". The loss
in quality occurs in {{createFromImage()}} (rather than {{getImage()}}), which
can be shown by embedding the {{PDImageXObject}} into a {{PDDocument}} and then
saving this document to a file.
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