matlab練習程序（圖像水平/豎直移動）

cl;
delta_x=67;          %要求為整數，水平移動的偏移量，正為向右，負為向左
delta_y=-89;         %要求為整數，豎直移動的偏移量，正為向下，負為向上
img=imread('Corner.png');       %這里v為原圖像的高度，u為原圖像的寬度
imshow(img);                    %這里y為變換后圖像的高度，x為變換后圖像的寬度
[v u]=size(img);

imgn=zeros(v+abs(delta_y),u+abs(delta_x));
rot=[1 0 0;0 1 0;delta_y delta_x 1]; 
inv_rot=inv(rot);
pix1=[1 1 1]*rot;           %pix1(1),pix1(2)分別為變換后圖像的左上角的y,x
pix4=[v u 1]*rot;           %pix4(1),pix4(2)分別為變換后圖像的右下角的y,x

%%向右下方移動
if delta_x>=0 && delta_y>=0
    for y=pix1(1):pix4(1)
        for x=pix1(2):pix4(2)
            pix=[y x 1]*inv_rot;      
            if pix(1)>=0.5 && pix(2)>=0.5 && pix(1)<=v && pix(2)<=u
                imgn(y,x)=img(round(pix(1)),round(pix(2)));        
            end
        end
    end
end

%%向左下方移動
if delta_x<0 && delta_y>=0
    for y=pix1(1):pix4(1)
        for x=pix1(2):pix4(2)
            pix=[y x 1]*inv_rot;      
            if pix(1)>=0.5 && pix(2)>=0.5 && pix(1)<=v && pix(2)<=u
                imgn(y,x-delta_x)=img(round(pix(1)),round(pix(2)));        
            end
        end
    end
end

%%向左上方移動
if delta_x<0 && delta_y<0
    for y=pix1(1):pix4(1)
        for x=pix1(2):pix4(2)
            pix=[y x 1]*inv_rot;      
            if pix(1)>=0.5 && pix(2)>=0.5 && pix(1)<=v && pix(2)<=u
                imgn(y-delta_y,x-delta_x)=img(round(pix(1)),round(pix(2)));        
            end
        end
    end
end

%%向右上方移動
if delta_x>=0 && delta_y<0
    for y=pix1(1):pix4(1)
        for x=pix1(2):pix4(2)
            pix=[y x 1]*inv_rot;      
            if pix(1)>=0.5 && pix(2)>=0.5 && pix(1)<=v && pix(2)<=u
                imgn(y-delta_y,x)=img(round(pix(1)),round(pix(2)));        
            end
        end
    end
end

figure,imshow(uint8(imgn))