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6.4.5: identify -format %Q always returns zero

https://magick.imagemagick.org/viewtopic.php?t=13630

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Re: 6.4.5: identify -format %Q always returns zero

Posted: 2009-04-26T08:30:31-07:00
by magick
Try the following:
  • convert logo: logo.jpg
    identify -format %Q logo.jpg
It returns 92 as expected. ImageMagick no longer reports any JPEG image with an approximate image quality because it can be unreliable. Certain custom quantization tables were returning a bogus compression quality metric.
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