Apparatus and method for detecting a plant against a background

An apparatus for detecting a plant leaf against a background that includes a means (10) for providing a plurality of different images of the plant sheet against the background, wherein the recordings differ in that image points of the different images that relate to the same location of the plant sheet are different brightly illuminated, means (12) for selecting pixels from the different recording whose magnitudes are within a predetermined range, wherein for a first site of the plant sheet an image point of a first receptacle is selected and for another part of the plant sheet a pixel of a second, different recording is selected to obtain a representation of the plant sheet against the background, which is composed of several shots, and means (14) for segmenting the composite recording to a segment presentation to be obtained s, comprising the plant leaf without the background, or the background without the plant leaf.