what does the L-shaped bracket mean?
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N1 = N2 = 4
xi = ith pixel of 4 x 4 block
What does the 'L - shaped bracket' mean? How to write code for alpha and beta?
1 个评论
KALYAN ACHARJYA
2019-2-16
采纳的回答
Image Analyst
2019-2-16
编辑：Image Analyst
2019-2-17
Just consider them as regular, normal brackets, or ignore them entirely.
xBar = mean(x(:));
alpha = mean(x(x >= xBar)); % Mean of x where x >= xBar
beta = mean(x(x < xBar)); % Mean of x where x < xBar
3 个评论
Image Analyst
2019-2-17
Since N is 4 this appears to be a sliding window operation, like a convolution. So the whole thing can be done with conv2() like I showed you in your other question. Then just threshold to values above or below zero to get the thresholded images -- the alpha and beta images. There is no need to round down with floor to create the images.
Elysi Cochin
2019-2-17
编辑：Elysi Cochin
2019-2-17
Image Analyst
2019-2-17
t is the number of elements in the block, which is 16 for a 4x4 block, or the number of pixels in the image if you're doing it over the whole image. Like I said, since it's only 4x4 I think it's a sliding window and you'd just use the code I gave you in the other answer and not even use t.
更多回答（1 个）
Those brackets are actually the common way in mathematics to represent the floor function:
They are unlikely to be a formatting error.
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