基于DMD的区域积分时间可控成像

Regional integration time controllable imaging based on DMD

利用CCD(Charge Coupled Device)相机获取图像后常常存在区域过暗和过曝光的情况,而这两种情况都会掩盖该区域的细节信息。改变CCD相机的积分时间只能对获取的当前帧图像进行单一的积分时间增加或减小,不能同时处理一帧图像中光强过强和过弱的情况。因此针对DMD(Digital Micromirror Device)对每一个微镜片的翻转时间可控的特点,提出了一种区域积分时间可控成像系统,该系统可以通过控制DMD微镜片翻转时间来增加或者减少图像指定区域的积分时间。实验结果表明,该系统可有效地达到同时处理一帧图像中区域过暗和过曝光的目的。

When an image is captured by CCD, some regions of the acquired image are usually too dark or over-exposure, either of the previous problem will cover the detail information of the regions. The changing integration time of the CCD can only increase or decrease at one time, the given problem can not be solved when the dark region and the over-exposure region both exit in the same image. So a new regional integration time controllable imaging system based on DMD is proposed. By changing the flip time of the micromirror in the DMD, this system can both decrease and increase the integration time at one time. The result of the experiment shows that the imaging system can solve the given problem very well.