摘要
为了提取显示器的显示数据,提出一种自动提取视频中显示区域的方法,该方法利用多帧视频图像信息,根据录取的视频图像的特点,采用帧间差分方法,分割出显示区域。然后,针对由于摄像头和显示器刷新率不同带来的阴影问题,采用一种保持对比度的灰度变换方法,消除了阴影的影响,同时增强了视频信息,为后续的图像处理扫清了障碍。
In order to acquire the data displayed on the computer monitor, a method of segmenting the screen automatically is proposed. The difference of frames is summed up to locate the screen. The shadow deriving form the different work frequency between monitor and video is erased in a way of gray translating that wtich may keep the contrast of the image. The enhanced image is clearer and contains more information than the original image for the latter processing.
出处
《传感技术学报》
EI
CAS
CSCD
北大核心
2006年第2期371-373,406,共4页
Chinese Journal of Sensors and Actuators
关键词
视频采集
图像分割
图像恢复
video acquisition
image segmentation
image restoration
