Mr. Xiaofan Li Profile

Xiaofan Li

at Nanjing Univ of Science and Technology

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Proceedings Article | 21 November 2014 Paper

Colorized linear CCD data acquisition system with automatic exposure control

Xiaofan Li, Xiubao Sui

Proceedings Volume 9296, 92960E (2014) https://doi.org/10.1117/12.2072469

KEYWORDS: Charge-coupled devices, CCD image sensors, Cameras, Control systems, Sensors, Human-machine interfaces, Data acquisition, Field programmable gate arrays, Imaging systems, CCD cameras

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Colorized linear cameras deliver superb color fidelity at the fastest line rates in the industrial inspection. It’s RGB trilinear sensor eliminates image artifacts by placing a separate row of pixels for each color on a single sensor. It’s advanced design minimizes distance between rows to minimize image artifacts due to synchronization. In this paper, the high-speed colorized linear CCD data acquisition system was designed take advantages of the linear CCD sensor μpd3728. The hardware and software design of the system based on FPGA is introduced and the design of the functional modules is performed. The all system is composed of CCD driver module, data buffering module, data processing module and computer interface module. The image data was transferred to computer by Camera link interface. The system which automatically adjusts the exposure time of linear CCD, is realized with a new method. The integral time of CCD can be controlled by the program. The method can automatically adjust the integration time for different illumination intensity under controlling of FPGA, and respond quickly to brightness changes. The data acquisition system is also offering programmable gains and offsets for each color. The quality of image can be improved after calibration in FPGA. The design has high expansibility and application value. It can be used in many application situations.

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