利用裂隙灯显微镜观察眼前节是眼科诊断中常用的检查手段,但长期以来存在着数据获取、保存和共享上的困难.而D irectShow是W indows平台上进行流媒体应用开发的最新标准.利用D irectShow技术设计了眼前节图像采集系统.阐述了根据需求构建采集系统的F ilter G raph模型的方法,包括采集设备的选取,视频流的预览和采集,以及如何使用Samp leG rabber方法捕捉眼前节图像,并提出了将D irectShow与MFC相结合进行开发的方法.该系统可以辅助眼科医师进行病理诊断,使医师可以有时间对图像进行细致的分析,从而提高病理诊断的正确率.经实际临床测试,效果较为理想.Observing anterior segment via slit lamp microscope is a common measure in ophthalmological diagnoses.However,this method has its inherent problem regarding to the difficulty of its data acquisition,storing and sharing.In this paper,a new design of anterior segment image capturing system based on DirectShow,which is a new standard media-streaming architecture for Windows platform, was presented.The building of Filter Graph model, which was the focus of the paper,included mainly three parts:the selection strategy of capture device,the preview and capture of video stream, and capturing anterior segment images by Sample Grabber method.A new method was proposed to the combination of DirectShow and MFC. With the help of this system,ophthalmologists can fix attention on in-depth analysis and as a result,the veracity of diagnosis can be increased.According to ophthalmologists,this system shows good results in clinic practice.国家自然科学基金(60371012);; 福建省科技重点项目(2002Y021);; 厦门市科技计划重点项目(3502Z20041044
