About gif to jpg color distortion

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beginner
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About gif to jpg color distortion

Post by beginner » 2018-06-09T23:42:40-07:00

2.gif
Image

convert 2.gif -background white -flatten 2.jpg

2.jpg
Image


If you convert to a png image, the color will not be distorted

convert 2.gif -background white -flatten 2.png

2.png
Image


Why are the colors distorted when converted to jpg pictures?
What parameters convert.exe need to add to keep the jpg image color unchanged?

thanks

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fmw42
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Re: About gif to jpg color distortion

Post by fmw42 » 2018-06-10T00:12:53-07:00

Gif has limited colors (<=256) and palette type. When converted to jpg with lossy compression, you introduce new colors and 24-bit color. You would have to create a color map image and use -recolor to try to get the same colors back in your jpg, though that may not work, since JPG does not support 8-bit total color.

beginner
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Authentication code: 1151

Re: About gif to jpg color distortion

Post by beginner » 2018-06-10T00:27:47-07:00

Thanks for your tip.

When I set the image compression quality to 100, the color is no longer distorted.

Image

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