Jpeg, remove chroma, keep only luma without recompressing?
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Is it possible to strip down chroma information from a jpeg file without loss on the luma?
Ideally I'd like a smaller file-size, greyscale version of an existing and optimized image.
image-processing imagemagick jpeg mogrify
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Is it possible to strip down chroma information from a jpeg file without loss on the luma?
Ideally I'd like a smaller file-size, greyscale version of an existing and optimized image.
image-processing imagemagick jpeg mogrify
I am not really sure what you want, so this may not be relevant. But you can change the sampling factor with ImageMagick. See imagemagick.org/script/command-line-options.php#sampling-factor
– fmw42
Nov 21 at 18:18
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up vote
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down vote
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Is it possible to strip down chroma information from a jpeg file without loss on the luma?
Ideally I'd like a smaller file-size, greyscale version of an existing and optimized image.
image-processing imagemagick jpeg mogrify
Is it possible to strip down chroma information from a jpeg file without loss on the luma?
Ideally I'd like a smaller file-size, greyscale version of an existing and optimized image.
image-processing imagemagick jpeg mogrify
image-processing imagemagick jpeg mogrify
asked Nov 21 at 14:31
Vincent Tschanz
163
163
I am not really sure what you want, so this may not be relevant. But you can change the sampling factor with ImageMagick. See imagemagick.org/script/command-line-options.php#sampling-factor
– fmw42
Nov 21 at 18:18
add a comment |
I am not really sure what you want, so this may not be relevant. But you can change the sampling factor with ImageMagick. See imagemagick.org/script/command-line-options.php#sampling-factor
– fmw42
Nov 21 at 18:18
I am not really sure what you want, so this may not be relevant. But you can change the sampling factor with ImageMagick. See imagemagick.org/script/command-line-options.php#sampling-factor
– fmw42
Nov 21 at 18:18
I am not really sure what you want, so this may not be relevant. But you can change the sampling factor with ImageMagick. See imagemagick.org/script/command-line-options.php#sampling-factor
– fmw42
Nov 21 at 18:18
add a comment |
1 Answer
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Assuming the scans are not interleaved, you could update the SOF marker to have one scan and then delete the 2d and 3d scans from the input stream.
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
Assuming the scans are not interleaved, you could update the SOF marker to have one scan and then delete the 2d and 3d scans from the input stream.
add a comment |
up vote
0
down vote
Assuming the scans are not interleaved, you could update the SOF marker to have one scan and then delete the 2d and 3d scans from the input stream.
add a comment |
up vote
0
down vote
up vote
0
down vote
Assuming the scans are not interleaved, you could update the SOF marker to have one scan and then delete the 2d and 3d scans from the input stream.
Assuming the scans are not interleaved, you could update the SOF marker to have one scan and then delete the 2d and 3d scans from the input stream.
answered Nov 21 at 21:16
user3344003
14k31336
14k31336
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I am not really sure what you want, so this may not be relevant. But you can change the sampling factor with ImageMagick. See imagemagick.org/script/command-line-options.php#sampling-factor
– fmw42
Nov 21 at 18:18