KIAS primer

Basic Image Processing

Displaying an Image

for( int y = 0; y < h; y++ ) {
	for( int x = 0; x < w; x++ ) {
		dist.at<Vec3b>(y,x)[0] = sources[1].at<Vec3b>(y,x)[0];
		dist.at<Vec3b>(y,x)[1] = sources[1].at<Vec3b>(y,x)[1];
		dist.at<Vec3b>(y,x)[2] = sources[1].at<Vec3b>(y,x)[2];
	}
}

where h = screen height, w = screen width and sources[1] = input

Flip image

Vertical flip

for( int y = 0; y < h; y++ ) {
	for( int x = 0; x < w; x++ ) {
		dist.at<Vec3b>(y,x)[0] = sources[1].at<Vec3b>(y,(w-x))[0];
		dist.at<Vec3b>(y,x)[1] = sources[1].at<Vec3b>(y,(w-x))[1];
		dist.at<Vec3b>(y,x)[2] = sources[1].at<Vec3b>(y,(w-x))[2];
	}
}

Horisontal flip

for( int y = 0; y < h; y++ ) {
	for( int x = 0; x < w; x++ ) {
		dist.at<Vec3b>(y,x)[0] = sources[1].at<Vec3b>((h-y),x)[0];
		dist.at<Vec3b>(y,x)[1] = sources[1].at<Vec3b>((h-y),x)[1];
		dist.at<Vec3b>(y,x)[2] = sources[1].at<Vec3b>((h-y),x)[2];
	}
}

Combined vertical-horisontal flip

for( int y = 0; y < h; y++ ) {
	for( int x = 0; x < w; x++ ) {
		dist.at<Vec3b>(y,x)[0] = sources[1].at<Vec3b>((h-y),(w-x))[0];
		dist.at<Vec3b>(y,x)[1] = sources[1].at<Vec3b>((h-y),(w-x))[1];
		dist.at<Vec3b>(y,x)[2] = sources[1].at<Vec3b>((h-y),(w-x))[2];
	}
}

Repeat image

Horisontal repeat

for( int y = 0; y < h; y++ ) {
	for( int x = 0; x < w; x++ ) {
		dist.at<Vec3b>(y,x)[0] = sources[1].at<Vec3b>((y),(x+x))[0];
		dist.at<Vec3b>(y,x)[1] = sources[1].at<Vec3b>((y),(x+x))[1];
		dist.at<Vec3b>(y,x)[2] = sources[1].at<Vec3b>((y),(x+x))[2];
	}
}