Labels:text | screenshot | display | diagram | rectangle | parallel OCR: Aligning Fiducial Markers They igraph reads in a sequence of images and signs bachi image based on the location of the cross har fidugal markers. The Images are corrected using a hierarfries operator based on the colon"[graph. The onginel and corrected images are displayed with a craphir overlay indicating the position of sanw cuts. Figure 3: A well-structured and annotated visual program.