// Get area of similarly-colored pixels, starting from a point
// Actually uses the FloodFill method but since this took me some time to figure out how it works, I have "libraried" the code
// Note : uses 8-way filling, one may want to alter this...
// => mask is input/output CvMat and has several restrictions; if you intend to use it on successive calls, pass it as null on first call
// and the function will create it for you appropriately.
static public CvConnectedComp GetAreaOfSimilarPixels(CvMat input, CvPoint startPoint, CvScalar lower, CvScalar upper, ref CvMat mask, byte maskCol = 255)
{
CvConnectedComp filledAreaData;
if (mask == null)
{
mask = new CvMat(input.Rows + 2, input.Cols + 2, MatrixType.U8C1, new CvScalar(0, 0, 0, 0));
}
input.FloodFill(
startPoint, 0, lower, upper, out filledAreaData,
(FloodFillFlag.Link8 | FloodFillFlag.MaskOnly | FloodFillFlag.FixedRange) + (maskCol << 8), mask);
return(filledAreaData);
}
