An Empirical Analysis of the Influence of Volleyball Elective Course on Students’ Physical Health Based on Digital Image

Algorithm 1

Gray image by MATLAB code.

	Input: Img=imread(‘.jpg’);
Output: imgshow()
[n m a]=size(Img);
GrayImage= rgb2gray(Img);
Img_Gray=zeros(n, m);
for x=1:n
for y=1:m
Img=max(Img(x, y, 1), max(Img(x, y, 2), Img(x, y, 3)));
GrayImage =(Img (x, y, 1)+Img (x, y, 2)+Img (x, y, 3))/3;
Img_Gray=0.3Img (x, y, 1)+0.59Img (x, y, 2)+0.11Img (x, y, 3);
end
end
figure.imshow(Img);
figure.imshow(GrayImage);
figure.imshow(uint8(Img_Gray));