A METHOD OF IMAGE RESOLUTION ENHANCEMENT BASED ON THE MATCHING TECHNIQUE

摘要

In the field of digital photogrammetry, it is very important to enhance the image resolution. By enhancement, a clearer image with higher resolution is produced. So far, the enhancement technique is widely applied in various photogrammetric images. However, because of the restriction of the CCD sensor itself, the number of pixels on the sensor isn't much enough in some case. The image quality is affected and restricted. To solve this problem, the enhancement techniques are expended mainly in two categories: One is hardware solution; the other is software solution. In this paper, we propose a software algorithm for the enhancement of the image resolution considering inaccurate sub-pixel matching. In the proposed algorithm, the shifts, the gray values of the low-resolution images and the enhancement ratio are used to calculate the gray values of the higher- resolution image iteratively. Thus, the new image has higher resolution, so that it has higher definition. Experimental results indicate that the proposed algorithm has more universal applications.