Generate random BMP in CLI

问题

I need a truly random BMP in order to test various lossy image compression algorithms. Ideally, this would not rely on any library and run in a Linux CLI.

It should generate a random BMP given a certain width and height.

回答1:

You can use ImageMagick (which is installed on most Linux distros by default) to generate an image of random noise like this:

convert -size 300x200 xc:gray +noise random out.bmp

where 300 is the width and 200 is the height (just examples).

Other types of noise are available, just run

convert -list noise

Output

Gaussian
Impulse
Laplacian
Multiplicative
Poisson
Random
Uniform

If the noise is too noisy ;-) for you, you can attenuate it with

convert -size 300x200 xc:gray -attenuate 0.5 +noise random out.bmp

for a 50% attenuation

Here are some examples of the different types:

Here are the corresponding distribution histograms:

来源：https://stackoverflow.com/questions/29011391/generate-random-bmp-in-cli