A DCT-domain compressed images registration approach

Image registration is an important task in image processing and there are large number of methods have been proposed. However, most current approaches are processed in the spatial domain, when being applied on some images in the format of compressed such JPEG or others, de-compress procedure is necessary. In this paper, a compressed domain image registration approach is proposed, in the proposed method, edge detection is processed on DCT domain directly and cross-correlation is applied on the binary edge map. Experimental results showed that the proposed approach is faster than spatial domain method while maintain good registration precision.