Colour, greyscale and monochrome (black-and-white) images placed above the
threshold resolution are resampled to the target (average, subsample or
bicubic) and compressed with ZIP, JPEG at the chosen quality, or
automatically (JPEGs stay JPEG, the others lossless); images already as
asked are embedded unchanged. JPEG 2000, CCITT, Run Length and no
compression are written as ZIP with a warning when an image needs them;
images with transparency stay lossless. Images no longer ask viewers to
smooth them in PDF/A files.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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