中文说明：资源描述特征提取是计算机视觉和图像处理中的一个概念。它指的是使用计算机提取图像信息，决定每个图像的点是否属于一个图像特征。特征提取的结果是把图像上的点分为不同的子集，这些子集往往属于孤立的点、连续的曲线或者连续的区域。
English Description：
Application backgroundFeature extraction is a concept in computer vision and image processing. It refers to the use of a computer to extract image information, determine whether each image is an image feature. The result of feature extraction is to divide the image into different subsets, which are often isolated, continuous curve or continuous region.