Object: to evaluate mesopic contrast threshold under 3 kinds of background and to explore the effect of adaptation time, adaptation luminance and glare on contrast threshold of humans eye.
目的评估3种背景环境下的中间视觉对比度阈值，并探讨暗适应时间、背景亮度和眩光对人眼对比度阈值的影响。
However, there always exists relatively large number of false positives in the segmentation results near the edges of moving objects and it suffers from slow adaptation to the changing background.
但是，它的分割结果中在目标物边缘附近存在较多的虚警，而且还存在对变化的背景适应缓慢的问题。
In view of this background, the article researches on cultural adaptation issues of peasants who migrate to cities.
本文即从这一研究背景出发，对进城农民的文化适应性问题进行广泛的研究分析。
The video sequences are processed by the background extraction and adaptation, moving objects detection, shadow detection, eroding and dilating image in order to create the moving pedestrian contour.
首先利用视频图像处理技术实现背景提取、背景更新、移动目标检测。
The video sequences are processed by the background extraction and adaptation, moving objects detection, shadow detection, eroding and dilating image in order to create the moving pedestrian contour.
首先利用视频图像处理技术实现背景提取、背景更新、移动目标检测。
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