Lateral image registration. (A) Two-channel alignment of lateral image data as acquired by the camera. Black and blue panels represent the two-color channels. Numbers indicate the relative position of each panel in the stack. (B) Image of the DNA stain used for image alignment overlaid the detection of blob-shaped interest points used as redundant geometric local descriptors to compute the lateral rigid transformations in A. (C) Illustration of the redundancy used for matching of geometric local descriptors. (D) Illustration of camera image after successful lateral alignment.