变焦距镜头组的自适应调焦的实现

Auto Adjust Focusing of Verity Focus

介绍了ST16 16 0自动调光变焦镜头 ,在无距离信息情况下实现自适应调焦的方法并做了相应的实验 实验采用图像处理技术实现自适应调焦 ,用图像采集卡采集视频信号在内存中存成一幅图像 ,运用图像处理学中的锐化技术对采集到内存中的图像进行处理 ,锐化采用梯度运算 ,以梯度运算得到的结果作为检测和评估焦面是否合适的标准 ,结果表明对静态近目标和远目标的自适应调焦有良好的调焦效果 ,运用图像处理方法寻找成像清晰的位置准确可靠 .

With modern electronic equipment and anti-shooting development, the precision of all trackers and the quality of imaging has been a key issue. In this paper, an auto adjust focusing principle about ST16160 is introduced How to effectively realize auto adjust focusing without distance information is emphasized Image processing is used to deal with the image information In the experiment, video signal is gathered by video view card and saved in the computer memory firstly Image data is processed by acutance technology And grads operation is used to process image that has been saved in the memory.Statistics proved that the result of grads operation can be regarded as a criterion for judging position.In order to increase the speed of getting to perfect position, a threshold is set .If grads value excess it, Hill-Climbing Search method is suggested, otherwise fast research is adopted .So, an ideal auto adjust focusing is confirmed. Experiment proved this criterion could be used by static close image and far image at the same time.