imwrite function for conversion issue?

2016 10 17
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更新时间：2016 10 17
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"If A is a grayscale or RGB color image of data type double or single, then imwrite assumes the dynamic range is [0,1] and automatically scales the data by 255 before writing it to the file as 8-bit values"
>>How matlab do this?

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Walter Roberson
Walter Roberson 2016-10-17

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if isfloat(A)
temp = uint8(A * 255);
imwrite(filename, temp);
else
imwrite(filename, A);
end

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