The flood fill operation fills the connected components with a given color. Starting from a seed point, the neighboring pixels are colored with a uniform color. The neighboring pixels can be within a specified range of the current pixel. The flood fill function is
int floodFill(InputOutputArray image, Point seedPoint, Scalar newVal, Rect* rect=0, Scalar loDiff=Scalar(), Scalar upDiff=Scalar(),int flags=4). The parameters
upDiff represent the range to check for every neighboring pixel (note that 3-channel difference thresholds can be specified). The parameter
newVal is the color to apply to the pixels that are in range. The lower part of the parameter
flags contains the pixel's connectivity value to use (
8). The upper ...