is it im2double() have the same result with double()?

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budi agung
budi agung 2017-4-4
回答： Jan 2017-4-4
i read a image name it 'lena'
is it im2double(lena) == double(lena)?

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回答（2 个）

Jan
Jan 2017-4-4
While double() converts the type of the data only, im2double() cares for the values also:
img = uint8([255, 127])
double(img) % >> [255, 127] as double
im2double(img) % >> [1, 0.498] as double
The values are scaled to the range [0.0, 1.0] as wanted.
Spencer Chen
Spencer Chen 2017-4-4
Try it and tell us.

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