The core process of this algorithm is easy to build. It is a simple scanning loop that goes over each pixel, comparing its color with the target color. Using what we learned in the Scanning an image with iterators recipe of Chapter 2, Manipulating the Pixels, this loop can be written as follows:
// get the iterators
cv::Mat_<cv::Vec3b>::const_iterator it=
image.begin<cv::Vec3b>();
cv::Mat_<cv::Vec3b>::const_iterator itend=
image.end<cv::Vec3b>();
cv::Mat_<uchar>::iterator itout= result.begin<uchar>();
// for each pixel
for ( ; it!= itend; ++it, ++itout) {
// compute distance from target color
if (getDistanceToTargetColor(*it)<=maxDist) {
*itout= 255;
} else {
*itout= 0;
}
}
The cv::Mat variable's image refers to the input ...
