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基于几何投影的运动阴影去除方法 被引量:1
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作者 王俊 王文中 汤进 《计算机技术与发展》 2015年第12期37-40,46,共5页
由于在使用图像差分法检测运动目标时,运动目标阴影会被当成运动目标而检测出,因此文中针对固定场景的运动目标阴影问题,提出了一种简单有效的基于几何投影的阴影去除方法。首先,根据图像灭点理论,通过场景先验知识计算场景图像的主方... 由于在使用图像差分法检测运动目标时,运动目标阴影会被当成运动目标而检测出,因此文中针对固定场景的运动目标阴影问题,提出了一种简单有效的基于几何投影的阴影去除方法。首先,根据图像灭点理论,通过场景先验知识计算场景图像的主方向。其次,结合帧差法和背景差法检测运动前景,把前景像素点在场景图像主方向的垂线方向上进行几何投影。根据目标轮廓和阴影轮廓的主方向与场景图像主方向的可区分特性,通过阈值化投影值则可分割出目标区域和阴影区域,进而去除阴影区域。最后,考虑到光照、目标自身大小、目标运动方向以及运动目标速度等因素对阴影的影响,文中在不同条件的视频上进行了实验,通过与原图对比和实验间相互对比验证了文中算法的有效性。 展开更多
关键词 运动目标检测 图像主方向 几何投影 阴影去除
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Recognition algorithm for turn light of front vehicle
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作者 李仪 蔡自兴 唐琎 《Journal of Central South University》 SCIE EI CAS 2012年第2期522-526,共5页
Intelligent vehicle needs the turn light information of front vehicles to make decisions in autonomous navigation. A recognition algorithm was designed to get information of turn light. Approximated center segmentatio... Intelligent vehicle needs the turn light information of front vehicles to make decisions in autonomous navigation. A recognition algorithm was designed to get information of turn light. Approximated center segmentation method was designed to divide the front vehicle image into two parts by using geometry information. The number of remained pixels of vehicle image which was filtered by the morphologic feaatres was got by adaptive threshold method, and it was applied to recognizing the lights flashing. The experimental results show that the algorithm can not only distinguish the two turn lights of vehicle but also recognize the information of them. The algorithm is quiet effective, robust and satisfactory in real-time performance. 展开更多
关键词 intelligent vehicle turn light recognition adaptive threshold front vehicle
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