A method for individual grain sorting of objects (3.1) from bulk materials, wherein - height distribution of the plurality of objects (3.1) on a conveying device and propagation of a light band (4.1) illuminating in a temporally constant manner a polygonal surface of the individual object (3.1) that cannot be identified in advance are used as sorting criteria, - the light band (4.1) is projected on a plane wherein a first part (4.1.1) of the generated light is reflected by the surfaces of the objects (3.1) and a second part (4.1.2), depending on the topological or polygonal nature of the surface of the individual object (3.1), enters the respective upper polygonal material geometry at an entry point (3.1.1), is then scattered and emerges again at an exit point (3.1.2), the light travelling along a path under the surface of the material, - such reflected and scattered propagation is optically detected and resolved in a grid having step width (B w) per segment along the light band (4.1) in a location- and time-referenced manner as digital signals from a plurality of sequentially recorded rows (B z) according to the principle of laser triangulation or polygonization, and is determined at a height (h) of a measuring point, - the detected/detectable propagation of the light band (4.1) is recorded and displayed as a buffered image, and contiguous regions in the buffered rows (B z) for measured values are identified as an object image associated with the respective real object (3.1), and the boundaries of the real objects are identified in the buffered image, - the data of all measured values of an object image of each of the real object (3.1) are converted to feature values of the object images and, depending on pre-set sorting parameters for the feature values, a discharge unit of the conveying device is activated. - height distribution of the plurality of objects (3.1) on a conveying device and propagation of a light band (4.1) illuminating in a temporally constant manner a polygonal surface of the individual object (3.1) that cannot be identified in advance are used as sorting criteria, - the light band (4.1) is projected on a plane wherein a first part (4.1.1) of the generated light is reflected by the surfaces of the objects (3.1) and a second part (4.1.2), depending on the topological or polygonal nature of the surface of the individual object (3.1), enters the respective upper polygonal material geometry at an entry point (3.1.1), is then scattered and emerges again at an exit point (3.1.2), the light travelling along a path under the surface of the material, - such reflected and scattered propagation is optically detected and resolved in a grid having step width (B w) per segment along the light band (4.1) in a location- and time-referenced manner as digital signals from a plurality of sequentially recorded rows (B z) according to the principle of laser triangulation or polygonization, and is determined at a height (h) of a measuring point, - the detected/detectable propagation of the light band (4.1) is recorded and displayed as a buffered image, and contiguous regions in the buffered rows (B z) for measured values are identified as an object image associated with the respective real object (3.1), and the boundaries of the real objects are identified in the buffered image, - the data of all measured values of an object image of each of the real object (3.1) are converted to feature values of the object images and, depending on pre-set sorting parameters for the feature values, a discharge unit of the conveying device is activated.