本文選題：多路圖像采集　切入點：FPGA　出處：《哈爾濱理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本文是基于我國“數(shù)字海洋”，研制數(shù)字化海面采集與生成系統(tǒng)中圖像采集同步部分的模擬試驗。該部分是通過實時記錄海面幾何波形的變化，對采集的圖像進行算法處理，將實時海面波形圖像變換為具有對應(yīng)幾何精度的立體高度圖，獲取模擬海面的數(shù)字化波形。 由于現(xiàn)場待測海波池區(qū)域面積很大，一臺CCD攝像機的測量范圍不能覆蓋整個測量區(qū)域，不能滿足測量的需求。因此，需要采用多臺CCD攝像機分區(qū)域測量與數(shù)據(jù)融合的方式進行現(xiàn)場大范圍海浪浪高的在線測量，即使用多臺CCD攝像機從空間不同的位置測量整個區(qū)域。通過在海波池沿線等間隔布置四對測站，每對測站負責(zé)所覆蓋海波區(qū)域的浪高實時數(shù)據(jù)采集及測量工作。由于四對測站測量的是在同一激光參考平面上調(diào)制的同一海波波形，只是測量區(qū)域不同，可以對四組浪高測量信息進行數(shù)據(jù)融合與歸一化處理。 為了實現(xiàn)多CCD攝像機對海波池區(qū)域的圖像采集，本文設(shè)計了多CCD攝像機同步圖像采集系統(tǒng)。系統(tǒng)以Camera Link接口的CCD攝像機為圖像采集裝置，現(xiàn)場可編程邏輯器件FPGA為控制核心實現(xiàn)了對海波池圖像的采集與顯示。系統(tǒng)通過Camera Link接口將CCD采集的圖像數(shù)據(jù)送入FPGA數(shù)據(jù)緩存模塊，數(shù)據(jù)緩存模塊再通過PCI接口將采集到的數(shù)據(jù)送到計算機內(nèi)，完成整個圖像的采集。 系統(tǒng)的硬件設(shè)計主要包括功能芯片的選型、FPGA與CCD攝相機的接口設(shè)計、多CCD攝相機同步控制電路的設(shè)計、圖像采集和預(yù)處理模塊的設(shè)計、FPGA與PCI總線接口的設(shè)計以及電源模塊設(shè)計等。在程序設(shè)計中，采用verilog HDL硬件描述語言實現(xiàn)對多CCD攝相機的同步觸發(fā)邏輯，CameraLink接口邏輯、SDRAM圖像緩存控制邏輯以及PCI接口邏輯等邏輯單元的設(shè)計。最后，設(shè)計完成了原理圖及PCB板的設(shè)計。 通過對系統(tǒng)的仿真及測試，表明系統(tǒng)滿足設(shè)計功能，基本完成了設(shè)計要求。
[Abstract]:This paper is based on our country's "digital ocean", develops the digital sea surface acquisition and generation system image acquisition synchronization part of the simulation test, this part of the real-time recording of the sea surface geometric waveform changes, the image acquisition algorithm processing, The real-time sea surface waveform image is transformed into a stereo height map with corresponding geometric accuracy, and the digital waveform of simulated sea surface is obtained. Because the area of sea wave pool is very large, a CCD camera can not cover the whole measurement area, so it can not meet the needs of measurement. It is necessary to use multiple CCD cameras to measure the ocean wave height in a large area by using the method of area measurement and data fusion. Even though multiple CCD cameras are used to measure the entire area from different locations in space, four pairs of stations are arranged at equal intervals along the sea wave pool, Each station is responsible for the real-time data acquisition and measurement of wave height in the area covered by sea waves. Because four pairs of stations measure the same wave waves modulated on the same laser reference plane, but the measuring regions are different. Four groups of wave height measurement information can be fused and normalized. In order to realize the image acquisition of sea wave pool with multiple CCD cameras, a synchronous image acquisition system for multiple CCD cameras is designed in this paper. The system uses the CCD camera of Camera Link interface as the image acquisition device. The field programmable logic device (FPGA) is used as the control core to realize the image acquisition and display of the sea wave pool. The system sends the image data collected by CCD into the FPGA data cache module through the Camera Link interface. The data cache module sends the collected data to the computer through the PCI interface to complete the whole image acquisition. The hardware design of the system mainly includes the interface design between FPGA and CCD camera and the synchronous control circuit of multi-#en1# camera. The design of image acquisition and preprocessing module, the interface between FPGA and PCI bus, the design of power supply module, etc. Verilog HDL hardware description language is used to realize the design of synchronous trigger logic for multiple CCD cameras, camera link interface logic, image buffer control logic and PCI interface logic. Finally, the schematic diagram and PCB board are designed. Through the simulation and test of the system, it shows that the system meets the design function and basically completes the design requirements.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P715;TP274.2

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