사용한 라이브러리

Q.1. 채널 교환

int main()
{
    PPM ppm("imori.pnm");
    int width = ppm.Get_width();
    int height = ppm.Get_height();
    PPM ppm2(width, height);

    for(int j=0; j<height; j++)
        for (int i = 0; i < width; i++)
        {
            ppm2(i, j, 'b') = ppm(i, j, 'r');
            ppm2(i, j, 'g') = ppm(i, j, 'g');
            ppm2(i, j, 'r') = ppm(i, j, 'b');
        }

    ppm2.Flush("out.ppm");
    return 0;
}