Using this algorithm almost all data points that are not representing a tree top can be eliminated. Since this method works over the hole image with the same set up it is not possible to consider special situations. If trees are located next to open plans like roads their branches have got more space and light and will therefore grow more towards these open spaces. These trees have slightly different shape in comparison to trees growing in the middle of planting rows. As a result of that situation some of these trees next to open plans will be defined by more than one tree top.