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What kind of tools does convert -quality use in command line?

Posted: 2018-03-27T18:24:23-07:00
by turkdue
Hello,

I am doing a project where I use convert -quality <value> in order to decrease the quality of a jpg image. I was wondering if the IJG quality standards and the related libjpeg quantization tables are used for this? I have been looking at the GitHub Repo to see if there was any reference, however, I am having trouble finding it. I need to find a source that suggests it. If anyone knows where I can find it, it will be very helpful.

Thanks.

Re: What kind of tools does convert -quality use in command line?

Posted: 2018-03-27T18:38:19-07:00
by snibgo
Have you looked in coders\jpeg.c?

Re: What kind of tools does convert -quality use in command line?

Posted: 2018-03-28T08:40:41-07:00
by turkdue
Is that applicable for the command line convert -quality value option?

Re: What kind of tools does convert -quality use in command line?

Posted: 2018-03-28T11:44:33-07:00
by snibgo
Yes.