The System Design Of The Underwater Images Real-time Enhancement Based On FFGA

Fast approaching the ship in distress is an important part of the emergency search and rescue operations at sea. In order to improve aid efficiency. Due to a large amount of suspended particles in the water so the water becomes a special kind of medium, the sea is not only selective absorption of light, but also make the scattered light, the two mutually superimposed a huge role in more light attenuation, which makes water shooting under low image resolution, poor contrast, is not conducive to observation targets, therefore, how to get high-resolution imaging of underwater target is the urgent need to address the key issues, the development of underwater high-resolution optical imaging technology is imperative. This paper is the National Technical Programs-Maritime Distress fast approaching the part of the technical project objectives, the main key technologies for high-definition underwater optical imaging research.In order to improve the image sharpness of the captured underwater target, we load the FPGA chip in low-light camera, use of the FPGA in real time the captured image enhancement processing, the human eye to give a clear image results. Analog cameras using a computer to send and receive images, and clarity, and real-time image of the two performance metrics to conduct a feasibility analysis of post-processing.In this paper, the specific contents of the study include both algorithm design and computer simulation camera. In the design of the algorithm include the use of MATLAB algorithms for automatic gradation design, black and white images of underwater after treatment, to get a clear result, which proves the effectiveness of the algorithm. In the computer simulation of the camera includes an image transmitted from the PC via USB3.0interface USB3.0-ALTERA-DDR2development board, the board is under the control of USB3.0transfer images, and adjust the picture format received; adjust after via LVDS, came into the FPGA image processing; after processing the image transmitted through LVDS frame grabber, image after image acquisition card back to PC, the PC analyzes the received image clarity and timeliness. you can embed this FPGA board camera, so you can use the camera to record clear images directly reached by underwater visual purposes.