No reference affine compensation using three 2-D barcodes

This paper proposes an image registration scheme using multiple two-dimensional (2-D) barcodes. The proposed scheme never requires any reference image which correspond to the image to be compensated, whereas correlation-based schemes require a reference image such as the original image. The proposed scheme superimposes three 2-D barcodes on an original image, whereas one barcode is used in ordinary applications. 2-D barcodes carry information to be used in an image registration; positions of barcodes, relations among barcodes, and so on. The image with 2-D barcodes is printed for distribution and is registered after redigitized by a scanner. By using the 2-D barcode that is robust to the geometric deformation, 2-D barcodes can be decoded before registration, i.e., information for image registration is obtained before compensation. The proposed scheme compensates an affine distortion of the image by using decoded geometric relations.