Research And Realization Of Digital Panoramic Image Processing Technology

Digital panoramic image is the use of computer technology combined with a specific device to obtain three-dimensional space which is greater than all hemispherical field information to map the image by the computer. Because the panoramic image vision sight is open, which for commercial, civil, military and aviation space based on a large visual information to make decisions in the field of industry has important significance. So far, panoramic image processing technology is mainly composed of the following kinds:single vision sensor and PTZ, multiple visual sensor, reflecting mirror and Fisheye lens.Single vision sensor, through rotating PTZ access to environmental information,this method would be limited by the speed of PTZ;using multiple visual sensor,the method to obtain images stitching, in order to effectively splicing of multiple sensors,which must be accurate installation, and the engineering work is very larger;through using reflecting mirror, convex mirror, two times after reflection, the imaging effect is very poor, and the camera itself will also imaging; using Fisheye lens method, fisheye has the characteristics of large field of view, each frame contains a wealth of information,has a unique application value,so the panoramic image using fish eye lens technology research,will be very meaningful.Fisheye is a kind of short focal length with wide field camera lens. A fisheye image contain abundant environmental information, but according to the principle of optical imaging, the shorter the focal length, the greater the angle of view,the greater the image produced by distortion. Fisheye lens distortion is very serious,while must be corrected images into the habits of the peoples.This paper designs and implements a panoramic image processing software.We input the fisheye image and correct the distortion. The image after the correction can be spliced to from a panoramic image.Before correction was carried out on the image, we must extract the fisheye lens of circular region effectively.First of all,we study the existing effective region extraction algorithm,such as the area of statistics,the scan line algorithm, and the based on region growing methods. This paper selects scan line algorithm for experiment.The results showed that the computing speed of the algorithm is faster and more accurate.Then,we use reverse mapping method in this paper, use a spherical perspective projection correction,image projection distortion occur in the generated image of the problem, this paper use the bilinear interpolation algorithm to solve the distortion. Because using a fisheye lens to generate panoramic images, then mosaic algorithm should also is an important object of study, this article only simple study of the mosaic image. At the end of the paper also studied the image in the process of application software design, the image zooming algorithm and realized rotation, etc. This software can basically meet the requirements of individual experiments and applied research.The experimental results show that image correction request has been implemented well.The application software realizes the function of the extraction of fisheye contour, fisheye image distortion correction.The software can meet the requirements of personal experiments and applied research.