What is the use of max in the following code?

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D Joseph 2015-8-15

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评论： D Joseph 2015-8-17

fname = 'texture1.bmp';
e = imread(fname);
e = double(e);
im = e;
im = double(im);
im = im/max(im(:));

What is the use of last line of code in matlab?

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Walter Roberson 2015-8-15

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Is is used to scale the data so that it has a maximum value of 1, so the parts of the image are considered in relative proportions rather than by absolute value. This would be common when the key information is the relationship between parts rather than how bright the example happened to be.