CODEWITHSUNDEEP
rgbimagick
Jalpa Bhavsar
Jalpa Bhavsar

Reputation: 71

Extract Red Channel from Image

I have a Image say 'X' (RGB) from which i want to get Image of RED Channel using Imagick I tried refering http://www.imagemagick.org/Usage/quantize

Upvotes: 6

Views: 5851

Answers (1)

mwfearnley
mwfearnley

Reputation: 3669

The command you need can be found in the ImageMagick documentation at https://usage.imagemagick.org/color_basics/#separate:

Separating Channel Images

The easiest way separating out the individual color channels is to use the "-separate" operator to extract the current contents of each channel as a gray-scale image.

magick rose: -channel R -separate separate_red.gif
magick rose: -channel G -separate separate_green.gif
magick rose: -channel B -separate separate_blue.gif

Rose ==> Rose Red Rose Green Rose Blue

In these examples, the rose: parameter makes it use a small built-in image of a rose for the input. (Helpfully, you can see the redness of the rose shows up as lighter in the red channel.)

Upvotes: 7

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