一种CCD相机电子快门的自动控制算法

An Automatic Control Algorithm on CCD Camera Electric Shutter

为了使CCD相机适应变化的环境光强,从而获得稳定的高质量图像特征,提出了一种获得稳定图像特征的电子快门自动控制算法。结合图像处理中的灰度拉伸技术,实现了一种方便、稳定及高精度的调光。其算法主要由基于场景灰度均值对数的三次多项式插值函数自动快门控制和图像灰度拉伸实现。实验结果表明,该算法具有稳定快速的收敛性,捕获的视频图像在各种条件下均具有良好的图像质量和环境适应性。

In order to adapt the optic intensity variation of the environment and to obtain stable and high quality image features, an automatic control algorithm on CCD camera electric shutter is proposed. This algorithm mainly consists of two parts： auto shutter control （ASC） based on cubic interpolating polynomial of common logarithm of the image average gray and image grey stretch technique based on experiment data analysis. The experimental result shows that the proposed algorithm has fast and stable convergences, and those captured images by using this technique have good quality and adaptability at different environment illumination