checks dithering questions

Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
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mattyrb
Posts: 22
Joined: 2018-10-03T08:08:10-07:00
Authentication code: 1152

checks dithering questions

Post by mattyrb »

I've a couple of questions I wondered if someone could help me with.

1. I presently use "convert X.jpg -ordered-dither checks,3,3,3 X2.png" to reduce images to 27 colours. Is it possible to reduce an image to 16 colours without declaring the RGB range and then having to apply a reduction?

2. Is it possible to invert the checks pattern so it is flipped when carrying out the function in question 1?

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