- "Optimized baseline entropy coding" = "Huffman table optimization"
"Optimized baseline entropy coding" was meant to emphasize that the
feature is only useful when generating baseline (single-scan lossy
8-bit-per-sample Huffman-coded) JPEG images, because it is
automatically enabled when generating Huffman-coded progressive
(multi-scan), 12-bit-per-sample, and lossless JPEG images. However,
Huffman table optimization isn't actually an integral part of those
non-baseline modes. You can forego Huffman table optimization with
12-bit data precision if you supply your own Huffman tables. The spec
doesn't require it with progressive or lossless mode, either, although
our implementation does. Furthermore, "baseline" describes more than
just the type of entropy coding used. It was incorrect to say that
optimized "baseline" entropy coding is automatically enabled for
Huffman-coded progressive, 12-bit-per-sample, and lossless JPEG
images, since those are clearly not baseline images.
- "Progressive entropy coding" = "Progressive JPEG"
"Progressive" describes more than just the type of entropy coding
used. (In fact, both Huffman-coded and arithmetic-coded images can be
progressive.)
- Mention that TJPARAM_OPTIMIZE/TJ.PARAM_OPTIMIZE can be used with
lossless transformation as well.
- General wordsmithing
- Formatting tweaks
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