In this paper we propose a mosaicing method of camera-captured document images. Since document images
captured using digital cameras suffer from perspective distortion, their alignment is a diffcult task for previous
methods. In the proposed method, correspondences of feature points are calculated using an image retrieval
method LLAH. Document images are aligned using a perspective transformation parameter estimated from the
correspondences. Since LLAH is invariant to perspective distortion, feature points can be matched without
compensation of perspective distortion. Experimental results show that document images captured by a digital
camera can be stitched using the proposed method.