The dataset was detected with a camera that was mounted on the top of a mower. The height of the camera was about 4m above ground, and the camera was facing forward with an angle of 45°. This dataset consists of 4 different classes which have been obtained in the forefield of a grass mower. The forefield of the mower was split into three image parts and each image part is in front of one mowing blade (left, center, and right). The classes are: dry, grass, mowed, unplanted. At the end, 10.213 sub-images for grass, 670 sub-images for dry, 4.195 sub-images for mowed, and 198 sub-images for unplanted have been collected.