一种基于CMOS图像传感器的照度测量方法

A Method of Measuring Illuminance Distribution Based on CMOS Image Sensor

研究了利用CMOS图像传感器结合数字图像处理方法获取环境工作的照度的可行性。分析了曝光输出值与曝光时间及增益的关系,确定了环境照度的测量方法。针对工程实际的需要,设计了基于CMOS传感器OV7670的图像采集与亮度测量系统,研究了系统标定和参数辨识的方法,实现了照度的快速测量。结果表明,该方法能够快速测量环境照度,能够满足对环境照度测量精度的要求。

Abstract： The feasibility of using CMOS image sensor combined with digital image processing method to obtain environmental work illnminance is studied. The relationship between the output value, the exposure time and gain exposure is analyzed, and the environment illumination measurement method is determined. For the actual needs of the project, the image acquisition and luminance measurement system based on CMOS sensor OV7670 are designed and the method of system calibration and parameter identification is researched, which can realize fast measurement of intensity of illumination. The results show that the method can fast measure the environment illumination, and meet the requirement of accuracy of measurement.