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以往的CCD摄像机通过曝光时间和信号增益调节光照强度时,二者不能被最优配置运用,难以最大限度的发挥它们的调光功效,特别是对于光照强度变化剧烈,动态范围大的状况,画面不清晰。针对上述不足,将直方图均衡化法进行一定的改进,精确配置曝光时间,优化信号增益系数,实现曝光时间与信号增益的最优化配置。经过实验验证,画面效果得到明显改善,调整时间不超过40ms,系统运行稳定、可靠。
In the past, when the CCD camera adjusted the light intensity by the exposure time and the signal gain, the two could not be optimally configured and utilized, and it was difficult to maximize their dimming effect. Especially for the situation that the illumination intensity changes drastically and the dynamic range is large, the picture Not clear. In view of the above shortcomings, the histogram equalization method is improved, the exposure time is precisely configured, the signal gain coefficient is optimized, and the optimal configuration of exposure time and signal gain is achieved. After experimental verification, the picture effect has been significantly improved, the adjustment time does not exceed 40ms, the system is stable and reliable.