Tor Lillqvist wrote:One
> might even consider keeping and re-using the original quantization
> tables instead of using jpeg_set_quality() in case the quantization
> tables don't seem to be produced by libjpeg.

Which is what I understand Photoshop does, thereby giving
users the least level of surprise when they casually open/modify/save
a JPEG file.

Graeme Gill.
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