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传统激光成像关键角点特征检测器,需要进行逐项分立检测,操作复杂,检测精度低。为了提高激光成像关键角点特征采集精度,设计基于CCD的远程激光成像中关键角点特征采集器,其通过CCD47-10型CCD图像传感器获取远程激光成像中的关键角点特征,将EP4CE15F17类型的FPGA当成时序产生和控制芯片,驱动CCD47-10图像传感器进行关键角点特征的采集。通过CCD信号预处理电路采集CCD图像传感器反馈的模拟信号,采用THS4503运算放大器对信号进行放大处理,将模拟信号变换成差分信号传递到A/D采样芯片,采样芯片通过ADS1605模数转换芯片对CCD输出信号进行去噪和A/D转换,获取关键角点特征的数字信号。实验结果说明,设计的采集器各项功能运行正常,可实现远程激光成像中关键角点特征的高效采集和处理。
Conventional laser imaging key corner feature detector, need to be item by item test, complex operation, low detection accuracy. In order to improve the precision of the key corner feature acquisition of laser imaging, the key corner feature acquisition device in CCD-based remote laser imaging is designed. The key corner feature in remote laser imaging is obtained by CCD47-10 CCD image sensor. The features of EP4CE15F17 FPGA as a timing generation and control chip, CCD47-10 image sensor driven key corner feature collection. CCD signal preprocessing circuit through the acquisition of CCD image sensor feedback analog signal, the use of THS4503 op amp signal amplification, the analog signal is converted to a differential signal transmitted to the A / D sampling chip, sampling chip ADS1605 analog to digital conversion chip CCD The output signal is denoised and A / D converted to obtain the digital signature of the key corner feature. The experimental results show that all functions of the designed collector are operating normally, which can realize the efficient collection and processing of key corner features in remote laser imaging.