Black and White histogram

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Elapido
Posts: 42
Joined: 2011-06-10T14:27:28-07:00
Authentication code: 8675308

Black and White histogram

Post by Elapido »

Hi. How's the code to create a histogram in black and white, but pure black and white, that is a 2-color image, not greys. Thanx.
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snibgo
Posts: 12159
Joined: 2010-01-23T23:01:33-07:00
Authentication code: 1151
Location: England, UK

Re: Black and White histogram

Post by snibgo »

If the image is greyscale, the histogram will be black and white only. eg:

Code: Select all

convert rose: -colorspace gray -define histogram:unique-colors=false histogram:h.png
snibgo's IM pages: im.snibgo.com
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