After adaptive binarization (kernel size: 125 px) we calculate horizontal and vertical projection profiles, cf. Fan et al. (1998). To perform deskewing, we find an angle <hi xmlns="http://www.tei-c.org/ns/1.0" rend="math">α</hi> with <hi xmlns="http://www.tei-c.org/ns/1.0" rend="math">α</hi> <hi xmlns="http://www.tei-c.org/ns/1.0" rend="math">∈</hi> [-2.0,-1.5,...,2.0] such that rotating the image by <hi xmlns="http://www.tei-c.org/ns/1.0" rend="math">α</hi> maximizes