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photo:cli [2010/11/01 16:13] Toni Corvera Add "-quality 100" |
photo:cli [2010/11/05 02:58] Toni Corvera +alpha off |
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| ZIP compression is not supported by all programs but better than the more common LZW: | ZIP compression is not supported by all programs but better than the more common LZW: | ||
| - | $ convert FILE.TIF -compress zip -quality 100 FILE2.TIF | + | $ convert FILE.TIF -alpha off -compress zip -quality 100 FILE2.TIF |
| This discards any EXIF data! See below for how to copy it. | This discards any EXIF data! See below for how to copy it. | ||
| Note ''-quality'' here doesn't actually affect quality since this operation is lossless, but it increases the compression level slightly. | Note ''-quality'' here doesn't actually affect quality since this operation is lossless, but it increases the compression level slightly. | ||
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| + | ''-alpha off' drops the alpha channel (transparency) if there's one. Unedited scans shouldn't contain an alpha channel but this will depend of the programs involved. If present, dropping it will further reduce the filesize. | ||
| ===== Copy EXIF between files ===== | ===== Copy EXIF between files ===== | ||