how to export a matrix as an image file?

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navid zed
navid zed 2017-2-13
回答： Jan 2017-2-13
Hello guys, I have a matrix that includes numbers between -1 & 1. I wanna export it as an image file without any change in numbers of matrix. thank you

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回答（2 个）

KSSV
KSSV 2017-2-13
doc imwrite
Jan
Jan 2017-2-13
This will not work. Image files contain values e.g. from 0 to 255 for the red, green and blue channel. I do not know any image file format, which accept negative values and I could not imagine, what the value could have as physical meaning.
Either store the array as array, or scale the data to values from 0.0 to 1.0 or from 0 to 255, or to 65536, and store it as grey scale image. See doc imwrite .

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