The preauricular sinus is a common finding in the pediatric population. An unusual case of a preauricular sinus that had as only manifestations recurrent postau
针对现有轮廓匹配算法在轮廓缺失、轮廓噪声点、非线性光照下匹配效果差的问题,提出了基于方向梯度直方图(histogram of oriented gradient,HOG)特征描述的轮廓匹配算法。将轮廓曲线点离散化,计算所有离散点梯度并统计其在不同方向上的密度分布,以欧氏距离作为相似性度量,采用金字塔分层搜索策略进行搜索。统计所有离散点梯度信息得到梯度方向直方图,融合了轮廓的局部信息和全局信息,使得
Background: The EDH occurs due to the accumulation of bleeding between the inner table of the skull and the outer layer of the dura mater. It is said to account
A 45-year-old woman underwent a delayed breast reconstruction with a free Deep Inferior Epigastric Perforator Flap (DIEP flap) with total flap failure on the fo