Method for determining relative reflectances of a measurement surface, having the method steps of A. applying measuring radiation to the measurement surface so that a measurement spot (7a, 7b) is formed on the measurement surface, B. moving the measurement spot over the measurement surface in accordance with a first path movement along at least one first rectilinear measurement spot path, C. recording a first image set of a plurality of spatially resolved images of the measurement surface during the first path movement in accordance with step B and D. determining relative reflectances for a plurality of location points of the measurement surface, wherein, in method step B, the measurement spot (7a, 7b) is additionally moved over the measurement surface in a second path movement at least along a second rectilinear measurement spot path, which is not parallel to the first measurement spot path, in such a way that a first measurement path region of the measurement surface over which the measurement spot (7a, 7b) passes during the first path movement at least overlaps with a second measurement path region of the measurement surface over which the measurement spot (7a, 7b) passes during the second path movement, and wherein, in method step C, a second image set of a plurality of spatially resolved images of the measurement surface is recorded during the second path movement in accordance with step B, characterised in that, in method step D, an evaluation is carried out at points of intersection, the location points of which on the measurement surface are defined by evaluation lines (10a, 10b), a first group of rectilinear evaluation lines within the first measurement path region and at least one second group of rectilinear evaluation lines within the second measurement path region being specified and/or determined, wherein at least the first group has at least two evaluation lines which are spaced apart from one another, the evaluation lines of the first group are parallel to the first measurement spot path and the evaluation line or evaluation lines of the second group is/are parallel to the second measurement spot path, and each evaluation line of the first group has a point of intersection with at least one evaluation line of the second group, wherein, for each image set, a maximum greyscale value is determined at least for each point of intersection and, in method step D, relative reflectances of the measurement surface at least at a sub-set of the points of intersection are determined in dependence upon those maximum greyscale values. A. applying measuring radiation to the measurement surface so that a measurement spot (7a, 7b) is formed on the measurement surface, B. moving the measurement spot over the measurement surface in accordance with a first path movement along at least one first rectilinear measurement spot path, C. recording a first image set of a plurality of spatially resolved images of the measurement surface during the first path movement in accordance with step B and D. determining relative reflectances for a plurality of location points of the measurement surface, in method step B, the measurement spot (7a, 7b) is additionally moved over the measurement surface in a second path movement at least along a second rectilinear measurement spot path, which is not parallel to the first measurement spot path, in such a way that a first measurement path region of the measurement surface over which the measurement spot (7a, 7b) passes during the first path movement at least overlaps with a second measurement path region of the measurement surface over which the measurement spot (7a, 7b) passes during the second path movement, and wherein, in method step C, a second image set of a plurality of spatially resolved images of the measurement surface is recorded during the second path movement in accordance with step B, characterised in that, in method step D, an evaluation is carried out at points of intersection, the location points of which on the measurement surface are defined by evaluation lines (10a, 10b), a first group of rectilinear evaluation lines within the first measurement path region and at least one second group of rectilinear evaluation lines within the second measurement path region being specified and/or determined, wherein at least the first group has at least two evaluation lines which are spaced apart from one another, the evaluation lines of the first group are parallel to the first measurement spot path and the evaluation line or evaluation lines of the second group is/are parallel to the second measurement spot path, and each evaluation line of the first group has a point of intersection with at least one evaluation line of the second group, wherein, for each image set, a maximum greyscale value is determined at least for each point of intersection and, in method step D, relative reflectances of the measurement surface at least at a sub-set of the points of intersection are determined in dependence upon those maximum greyscale values.