Abstract: The invention relates to a method for evaluating the halves of slaughtered animals by optical image processing. A simple computerized method for sufficiently reliable evaluation is obtained even when the symmetry plane has been missed during cutting of the slaughtered animals due to cutting error by detecting two salient points and a straight line (5) in a photogrammetric reliable manner and by additionally calculating a parallel line (6) and a vertical line (7), wherein the end of the connecting bone (2) on the body side is used as first salient point and the central extension of the back fat (4) is used as a first direction.