Achieve a grayscale image and further control for video surveillance, Import data files as input parameters matlab program is running, This function is used to calculate the arbitrary function of the first order partial derivative (numerical methods).

Filename	Size	Update
fn750.m	8136	2017-06-21
pin.JPG	44499	2017-09-28
www.downma.com.txt	153	2017-08-11

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