What Is the third value when reading an image

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Harel Harel Shattenstein
Harel Harel Shattenstein on 13 Nov 2018
Answered: Image Analyst on 13 Nov 2018
When using imread() we get a matrix of the size [r,c,x] what does x stand for?

Answers (2)


Image Analyst
Image Analyst on 13 Nov 2018
When used with an image, the third output of the size() function represents how many color channels there are: 1 for a gray scale image and 3 for an RGB image. There are some watchouts if you only accept two size() outputs and you actually really have an RGB image and not a gray scale image. See the link below.
See Steve's blog discussion about this: Too much information about the size function.

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