Match two perspective images by an homography related a common planar surface (book cover). You need the input image bookcovers1.ppm and bookcovers2.ppm. Result image is called blendhomography.ppm -perspective images by an homogra + phy related a common planar surface (book cover ). You need the input image and bookcovers1.ppm bookcovers2.ppm. Result image is called blend homography.ppm