... exists in the foreground (i.e., in the interior of the object) and in the background, (4) the boundary is ‘fuzzy’, (5) parts of the object are occluded by otherobjects, and (6) the object of interest ... polygon.Region–growing: The user defines a starting point within the object. Based on the histogram of the image, the algorithm fills in the area around the starting point where the value of the pixeldifference is ... (in contrast to the background),– the neck of the ostrich (in contrast to its feathers),– the eye (in contrast to the neck),– the beak (in contrast to the eye), etc.Detection. The human eye...