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20 the -quality setting. The details of the scaling algorithm can be found in
22 can get scaled up to values exceeding 255. Although 2-byte quantization
25 wide compatibility of low-quality files, you can constrain the scaled
30 You can substitute a different set of quantization values by using the
41 Quantization table files are free format, in that arbitrary whitespace can
42 appear between numbers. Also, comments can be included: a comment starts
94 You can override this default with the -sample switch:
103 is equivalent to "-sample 2x2,1x1,1x1", which can be abbreviated to
107 sampling (also called 4:2:2 sampling). Compatibility with such decoders can
118 of progression parameters. You can create multiple-scan sequential JPEG
153 Scan script files are free format, in that arbitrary whitespace can appear
154 between numbers and around punctuation. Also, comments can be included: a
156 legibility, commas or dashes can be placed between values. (Actually, any
157 single punctuation character other than ':' or ';' can be inserted.) For