基于DirectShow的人工流产视频采集系统设计  

Video capture system based on Direct Show for induced abortion

作　　者：孔凡洋 孙桂芹[2] 彭建 余学飞[1] 张志德[1] 

机构地区：[1]南方医科大学生物医学工程学院医学工程系,广东广州510515 [2]南方医科大学南方医院妇产科,广东广州510515 [3]广东康业医疗设备有限公司,广东广州510403

出　　处：《中国医学物理学杂志》2015年第5期694-697,共4页Chinese Journal of Medical Physics

基　　金：广州市科技计划项目(201300000193);广东省科技计划项目(2012A032200015)

摘　　要：实现基于Direct Show的人工流产视频采集系统设计。人工流产吸引管采用近红外光作为照明光源,近红外光有着更强的穿透血液的能力。CMOS图像传感器选用1/18英寸低功耗的OV6922,非常适合于医疗成像应用,更好的应用在人工流产系统中。人工流产吸引管合理装配CMOS模组,可以更好地观察到整个手术部位,准确地定点吸引孕囊,避免盲刮。Direct Show在应用层上提供统一规范的COM接口,这样就将底层硬件设备与高层应用程序隔开,从而可以很方便地编程实现从设备获取多媒体数据或利用设备回放多媒体数据,而不必考虑具体的硬件特性。在VC++6.0环境下编写,Direct Show通过对过滤器的一系列操作,实现了视频采集功能、视频的存储以及图像处理等功能。A video capture system based on DirectShow for induced abortion was developed. The near-infrared light, with strong ability to penetrate blood, was adopted as lighting source for the suction tube for induced abortion to get a better view in blood environment. The OV6922, with a 1/18-inch format and a low power consumption, was applied as CMOS image sensor in the induced abortion system, for it is ideal for medical imaging applications. The CMOS module was properly assembled in the suction tube for induced abortion to observe surgical sites more clearly and avoid the blind curettage by accurately locating and sucking gestational sac. DirectShow provided unified standard COM interfaces at the application layer, separating the underlying hardware and high-level applications, which make it easy to program and acquire multimedia data from a device or use equipment playback multimedia data, with no concern for the specific hardware features. In VC ＋＋ 6.0 programming environment, a series of operations for filters based on DirectShow were adopted to realize video capture, video storage and video image processing.

关 键 词：人工流产 OV6922图像传感器 近红外光 VC++6.0编程环境 DIRECTSHOW技术 MFC类库 

分 类 号：R318.6[医药卫生—生物医学工程]