Ms. Chen Wang Profile

Chen Wang

at Nanjing Univ of Science and Technology

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Proceedings Article | 21 November 2014 Paper

Design of multi-mode compatible image acquisition system for HD area array CCD

Chen Wang, Xiubao Sui

Proceedings Volume 9296, 92960A (2014) https://doi.org/10.1117/12.2072459

KEYWORDS: Charge-coupled devices, CCD image sensors, Video, Video surveillance, Signal to noise ratio, Control systems, Image acquisition, Sensors, Image sensors, Interference (communication)

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Combining with the current development trend in video surveillance-digitization and high-definition, a multimode-compatible image acquisition system for HD area array CCD is designed. The hardware and software designs of the color video capture system of HD area array CCD KAI-02150 presented by Truesense Imaging company are analyzed, and the structure parameters of the HD area array CCD and the color video gathering principle of the acquisition system are introduced. Then, the CCD control sequence and the timing logic of the whole capture system are realized. The noises of the video signal (KTC noise and 1/f noise) are filtered by using the Correlated Double Sampling (CDS) technique to enhance the signal-to-noise ratio of the system. The compatible designs in both software and hardware for the two other image sensors of the same series: KAI-04050 and KAI-08050 are put forward; the effective pixels of these two HD image sensors are respectively as many as four million and eight million. A Field Programmable Gate Array (FPGA) is adopted as the key controller of the system to perform the modularization design from top to bottom, which realizes the hardware design by software and improves development efficiency. At last, the required time sequence driving is simulated accurately by the use of development platform of Quartus Ⅱ12.1 combining with VHDL. The result of the simulation indicates that the driving circuit is characterized by simple framework, low power consumption, and strong anti-interference ability, which meet the demand of miniaturization and high-definition for the current tendency.

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