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add a -jpeg_like option

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This option remaps internal parameters to better match
the expected compression curve of JPEG and produce output files
of similar size, but with better quality.

Change-Id: I96a1cbb480b1f6a0c6845a23c33dfd63f197b689
This commit is contained in:
skal
2013-02-05 19:40:18 +01:00
parent 1f803f645d
commit e895059a05
8 changed files with 80 additions and 29 deletions
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3
examples/cwebp.c
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@ -580,6 +580,7 @@ static void HelpLong(void) {
printf(" -progress .............. report encoding progress\n");
printf("\n");
printf("Experimental Options:\n");
printf(" -jpeg_like ............. Roughly match expected JPEG size.\n");
printf(" -af .................... auto-adjust filter strength.\n");
printf(" -pre <int> ............. pre-processing filter\n");
printf("\n");
@ -719,6 +720,8 @@ int main(int argc, const char *argv[]) {
config.filter_strength = strtol(argv[++c], NULL, 0);
} else if (!strcmp(argv[c], "-af")) {
config.autofilter = 1;
} else if (!strcmp(argv[c], "-jpeg_like")) {
config.emulate_jpeg_size = 1;
} else if (!strcmp(argv[c], "-strong")) {
config.filter_type = 1;
} else if (!strcmp(argv[c], "-sharpness") && c < argc - 1) {