摘要
提出了一种采用数字微镜(DMD)器件作为SLM调制面阵CCD的设计方法。解决普通CCD相机在拍摄高反差场景时,图像上出现过曝光或欠曝光,造成丢失细节的现象。该方法通过场景预测成像,确定CCD按多曝光区域的划定和曝光时间。利用DMD微镜调制功能,实现CCD分区分时曝光。同时设计一种图像数据结构提高了面阵CCD动态范围。实验证明,该方法不但提高了成像质量,高亮和背光处细节可清晰地表现。而且增强了图像数据的动态范围。实现了实时获取高动态范围、高质量的图像及数据,不再需要软件"融合"。
A method based on digital micro-mirror device （DMD） as a SLM modulates an area array CCD is proposed. It is used to solve the information cossing caused by over exposed or under exposed, when shooting high-contrast sences by general CCD camera. A CCD is mapped as multi-districts and is destined for multi-times exposed through a pre-image. A CCD is able to be exposed partly as using a DMD. A data structure is designed for enhancing dynamic range of image from CCD. Experiments show that this method improves the photo quality, and shows information in high lights or shadows clearly. It also enhances the dynamic range of image data. The high quality photo and its high dynamic range data are obtained real-time without the software fuse many different exposure images.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2009年第3期638-642,共5页
Acta Optica Sinica
基金
国家863计划(2007AAA12Z103)资助课题
关键词
图像处理
成像系统
数字微镜器件
高动态范围图像
面阵CCD
image processing
imaging system
digital micro-mirror device
high dynamic range image
area array CCD
