Multi-channel Image Acquisition And Processing System Design Apply To The Bionic Compound Eye

With the rapid development of electronic science and technology, multi-channel image acquisition and imaging system has a lot of demands in the field of contemporary urban video monitoring and military reconnaissance area. The technique of this kind of system acquires multi-channel images synchronously by multiple CCD cameras, then display images in real-time or even mosaic images into a high resolution, large field image. So it becomes an important subject in the research field of multi-channel image acquisition and processing.Inspired by insect compound eye’s entire angular detection performance, the researchers proposed an imaging system based on the bionic compound eye. This system simulates the insect’s surrounding small eyes using the array arranged compound eye lens. With the above form, the system can simulate the multi-channel imaging process to obtain wide field imaging effect. More and more researchers are attracted by bionic compound eye due to its advantages such as small volume, large field of view and high sensitivity to moving objects. Many research teams including domestic and abroad have carried out the research of imaging system based on the bionic compound eye. Thus the artificial bionic compound eye is a very good method for the multi-channel image acquisition and processing.On the basis of analyzing the various bionic compound eye imaging design and multi-channel image processing technologies, this thesis designs a multi-channel image acquisition and processing system used for bionic compound eye system. The system uses CYCLONE IV series FPGA of Altera Company as the core control chip, and the system is composed of the image acquisition module, FPGA module, storage control module, display control module and configuration circuit, etc. First, four-channel analog video signal acquired by CCD are converted to digital signal by a video frequency decoding chip controlled by FPGA. Then, the FPGA platform completes the process of video data storage, image processing and display controller. According to the requirements of VGA display timing, a ping-pong operation is used to read the image in memory. Finally, the four-channel video are displayed on the screen at the same time through the VGA interface. Based on this technology, this thesis also obtain a large field of view images by stitching multi images using SIFT algorithm and Harris corner algorithm.This thesis focuses on realizing the multi-channel image acquisition, decoding, storage, processing and display using FPGA and its combination control circuit. All modules are integrated in FPGA and its’ combination control circuit.This combination of hardware and software not only gives full play of the strong ability of FPGA’s data processing paralleled, but also makes the system with strong real-time performance;Combining with the flexible characteristics of the FPGA, the system can realize parametric programming, so the system can meet different requirements only need to change the parameter configuration. After testing repeatedly, the multi-channel image acquisition system runs stably and achieve the expected goals.