多视环境下特征点提取的并行实现

针对多视环境下特征点提取计算耗时较长的问题，提出其并行实现方法。通过灰度共生矩阵构造纹理特征差异度，选取关键视点和消除冗余视点，采用Harris角点提取算法、团块检测算法，提取关键视点图像的特征点，利用关键视点选取及特征点提取过程存在的并行性，对算法进行并行实现。实验结果表明，该方法能有效地选取关键视点，在双核处理器上使平均加速比达到1.88。

Parallel Implementation of Characteristic Point Extraction Under Multi-view Environment

Feature extraction in the multi-view environment is an important step in 3D reconstruction.However,it is a very time-consuming task.To accelerate the speed of extracting feature,this paper presents a parallel method to extract feature in the multi-view environment.The key views are selected by the texture feature discrepancy which is computed based on the grey level grows matrix.Harris corner detection algorithm and Blob detection algorithm are adopted to extract feature of the key view images.The method is parallelized by exploring the inherent parallelism of proposed procedures.Experimental results show that the method can select the key views efficiently,and the average speedup achieves 1.88 on a dual-core system.