zeros(8,m,n) for a 3d image, what does 8 specify here?.

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Gursheen
Gursheen 2014-3-21
回答： Image Analyst 2014-3-21
i have used this coding for an image..i am unable to understand as to why 8 has been used here?

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回答（2 个）

Azzi Abdelmalek
Azzi Abdelmalek 2014-3-21
Image Analyst
Image Analyst 2014-3-21
8 is the number of rows (the "Y" dimension).
m is the number of columns (the "X" dimension).
n is the number of color channels (typically 1 for grayscale or 3 for RGB true color or some other color space such as HSV or LAB). Sometimes thought of as the "Z" dimension.
So you have a multispectral image. Each color channel of that multispectral image is an 8 by m 2D image, and you have n of them (one for each wavelength range, color channel). Though in your case everything is zero, so maybe you're just initializing and pre-allocating space.

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