A computer-implemented method for determining indications of geometrical discontinuities on the surface of the surface of a body , which body is illuminated using a light source emitting light beams, and which body is recorded using a camera issuing image data, which image data comprises colour characteristics values on an image point, wherein - the colour characteristics values are compared at the individual image points and an accumulation of deviant colour characteristics values determined in a value subarea of the surface, which deviant colour characteristics values deviate from a colour average of the colour characteristics values of the surface or from a dominant colour characteristics value by a predefined limit value, is interpreted as a first indication of an image position of a geometrical discontinuity at image points neighbouring the value subarea or in the value subarea, and - the course of the colour characteristics values on image points of an image subarea is superimposed with a reference function , which reference function describes the course of colour characteristics values of image data of a surface having either a discontinuity or no discontinuity, to generate a superimposition image data quantity comprising superimposition colour characteristics values on the image points, and a maximum value and/or a minimum value in the superimposition image data quantity on an image point is interpreted as second indication of a geometrical discontinuity . which body is illuminated using a light source emitting light beams, and which body is recorded using a camera issuing image data, which image data comprises colour characteristics values on an image point, wherein - the colour characteristics values are compared at the individual image points and an accumulation of deviant colour characteristics values determined in a value subarea of the surface, - the colour characteristics values are compared at the individual image points and an accumulation of deviant colour characteristics values determined in a value subarea of the surface, which deviant colour characteristics values deviate from a colour average of the colour characteristics values of the surface or from a dominant colour characteristics value by a predefined limit value, is interpreted as a first indication of an image position of a geometrical discontinuity at image points neighbouring the value subarea or in the value subarea, and - the course of the colour characteristics values on image points of an image subarea is superimposed with a reference function , which reference function describes the course of colour characteristics values of image data of a surface having either a discontinuity or no discontinuity, to generate a superimposition image data quantity comprising superimposition colour characteristics values on the image points, and a maximum value and/or a minimum value in the superimposition image data quantity on an image point is interpreted as second indication of a geometrical discontinuity . - the course of the colour characteristics values on image points of an image subarea is superimposed with a reference function , which reference function describes the course of colour characteristics values of image data of a surface having either a discontinuity or no discontinuity, to generate a superimposition image data quantity comprising superimposition colour characteristics values on the image points, and a maximum value and/or a minimum value in the superimposition image data quantity on an image point is interpreted as second indication of a geometrical discontinuity . <EOS>