We propose a method to stitch still images taken by a camera with translation and generate a panoramic image automatically. In such situation, perspective parallax may arise at overlapping regions of two neighboring picture images, and this makes the stitching difficult if we use the existing algorithm in panoramic systems. To solve this problem, we introduce a technique of pattern detection and point-based matching in this paper.Pattern detection is carried out in two stages. The first one is line detection, and the second one is image segmentation. By this technique, the system extracts where the overlapping region is in each pair of neighboring images, and whether the perspective parallax exists. If this pattern detection can not extract similar segment from two neighboring images, point-based matching is applied to complete panoramic image generation. Several points with significant feature are sampled from one image, and their corresponding points are searched in the other image by point pattern matching.