沿y轴镜像

Question

I would like to mirror an image along the y-axis This is the code that i have:

for(int i = 0;i <breite; i ++){
           for(int j = 0; j <hoehe; j++){
                int temp = getRGB(breite-1-i,j);
                setRGB(breite-1-i,j,getRGB(i,j));
                setRGB(i,j,temp);

                   }}

In theory it should work, if I did not mix something up (which i probably did). After i run the code, the picture still remains the same. Any help is appreciated

Answer 1

几乎正确...但是您只需要迭代breite / 2的for循环，否则将其镜像两次，就不会看到任何更改。

for(int i = 0; i <breite/2; i++); for(int j = 0; j<hoehe; j++){ int temp = getRGB(breite-1-i,j); setRGB(breite-1-i,j,getRGB(i,j)); setRGB(i,j,temp); } }