A method and an arrangement for the optical evaluation of harvested crop operate according to the following steps: record an image of the harvested crop (62) with a camera (66); identify individual objects in the image by means of an electronic image processing system (80); classify the individual objects into predetermined object classes by way of comparison between colour features and/or contour features and/or texture features of the individual objects and corresponding characteristics of reference objects filed in a data bank (78) by means of the image processing system (80); and determine the absolute or relative numbers or areas of the individual objects assigned to the respective object classes.
