最近流行的网络迷恋的照片做头像，闲来无事，取matlab获取一个建设者，它可以产生包括0-9以及99+OCD。

原理很easy，图叠加，这里为了降低文件，将数字图片保存在.mat二进制文件里。

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代码例如以下：

clear,clc
%% open image file
[fn,pn,fi]=uigetfile('*.bmp;*.png;*.jpg;*.jpeg','choose image');
img=imread([pn fn]);
%% process image
width = size(img,1);%image width
height = size(img,2);%image height
minlength = min([width,height]);%min of width and height
circle_d = floor(minlength*(1-0.618));%circle radius
circle_x_end = circle_d;
circle_y_start = height - circle_d + 1;
%circle center
circle_center_x = circle_x_end/2;
circle_center_y = (circle_y_start+height)/2;
%draw circle--------------------------------
for i=1:circle_x_endfor j=circle_y_start:heightif((i-circle_center_x)^2+(j-circle_center_y)^2 <= (circle_d/2)^2)img(i,j,1) = 255;img(i,j,2) = 0;img(i,j,3) = 0;endend
end
% draw number-------------------------------
load number.mat
num = input('Input the number to add to the image:');
while(num<0 || num>9)num = input('Input error,out of range(0-9),reinput the number:');
end
%-------------------------------------------
%scale the nu7mber image
var_name = ['number' num2str(num)];
eval([var_name '=imresize(' var_name ',[circle_x_end,height - circle_y_start+1]);']);
%sharp the image
eval(['index = find(' var_name '>0);']);
for k=1:length(index)eval([var_name '(index(k)) = 255;']);
end
%add the value to the 2nd and 3rd layer
eval(['img(1:circle_x_end,circle_y_start:height,2) = img(1:circle_x_end,circle_y_start:height,2)+' var_name ';']);
eval(['img(1:circle_x_end,circle_y_start:height,3) = img(1:circle_x_end,circle_y_start:height,3)+' var_name ';']);
%% show image
imshow(img);
%% save image
dotindex = max(find(fn=='.'));
imwrite(img,[fn(1:dotindex-1) ' with number ' num2str(num) fn(dotindex:end)]);

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另外数字的二进制文件随代码一起上传在此（点击此处下载）

效果图例如以下：