Design And Key Technology Of Image Sampling And Transmission System With IMAQ Of Miniature Camera Array

With the rapid development of modern optical reconnaissance, supervision and warning technology, real-time imaging, transmission and display system of large field of view, high resolution and high frame frequency have become the research hotspots. The increase of FOV in ordinary imaging system leads to quick decline of imagine resolution rate.Besides, it will obtain more quantities of image data if the higher frame frequency is taken as the sample for the sampling of ultrahigh resolution image, which will bring much more difficulties for the real-time imaging and process of successive image. Many details will be lost by adopting lower frame frequency. Therefore, it will has an important practical meaning for the research of supervisory system that has lower broadband without losing details by combining LFOV with high frame frequency.For this purpose, a wide area image supervisory system with variable resolution was designed in this research group. The imaging technology of multi-scale mono-centric was used to gain the LFOV and HR image in this system. The way of local details in LFOV separated by spectroscope and MEMS micromirror was introduced to avoid losing target details under the condition of the lower frame frequency in LFOV. Meanwhile, the miniature camera module was adopted to reduce system volume.On the background of wide area image supervisory system with variable resolution in this text, the image sampling of miniature camera imaging array and submission system were designed and the whole systematical design scheme was given through analyzing and studying demand. The schematic diagram designing of sampling circuit board with front end was given in this text. The Xilinx Spartan 6 FPGA can be adopted as the processing unit, DDR2 SDRAM as cache, optical fiber transmission as the transmission method and HDMI as display mode. Then, there are many FPGA logical designs with key modules are designed in this text including camera configure, DDR2 SDRAM cache, optical fiber transmission and HDMI display modules. Finally, the above modules were debugged and tested and the functional test was made to the entire system. The result turns out that it has achieved functions as imaging capture of miniature camera cache, optical fiber transmission and display in this system.