MATLAB draws colorful coin graphics

clear all; close all;
I=imread('coins.png');
J=imnoise(I, 'salt & pepper', 0.02);
h=ones(3,3)/5;
h(1,1)=0;   h(1,3)=0;
h(3,1)=0;   h(1,3)=0;
K=imfilter(J, h);
figure;
subplot(131);
imshow(I);
subplot(132);
imshow(J);
subplot(133);
imshow(K);
colormap parula

colormap turbo

colormap jet

colormap hsv

colormap hot

colormap cool

colormap spring

colormap summer

colormap autumn

colormap winter

colormap gray

colormap bone

colormap copper

colormap pink

colormap colorcube

colormap default

Development tools: MATLAB 2022b
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