圖片批量求二階，並保存

clear;  
clc;  
  
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  
%參數配置  
  
ObjDir = 'C:\Users\DELL\Desktop\代碼\button\button\0\';%目標圖片文件夾路徑  
OutputDir = 'C:\Users\DELL\Desktop\代碼\button\button\0_la\';%輸出文件夾路徑  
tnum = 280;%目標圖片數目  
  
%注：  
%  目標圖片命名爲:i.png(i取1到tnum)  
  
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%  
  
for i = 1:1:tnum  
    bgFile = [ObjDir,int2str(i),'.jpg'];% 讀入圖片的完整路徑 
    
    I=imread(bgFile); 
    G = rgb2gray(I); 
    G=double(G);   
    H=[0 -1 0     -1 5 -1     0 -1 0];    
    J=conv2(G,H,'same');
    figure(i),imshow(J,[]);  
    saveas(i,[OutputDir,int2str(i),'.jpg']);%將處理後的圖片保存到目標文件夾  
end  
close all