compare_segmentations

十分有用的 图像pocs算法，内有图片说明及示例(A very useful POCS algorithm for images, with illustrations and examples)

图像的高斯与拉普拉斯金字塔分解，两种方法都有(Image gaussian and Laplacian pyramid decomposition, there has two kinds of method)

说明：  将hdf格式转换为tif格式、重投影、重采样(.hdf to .tif, resample)

计算图像的多重分形谱。它是分形的多尺度衡量的分型参数。(Calculated images multifractal spectrum. It is a multi-fractal measure the sub-type parameters.)

基于点云的谷脊线特征提取算法研究：提出一种基于多步逼近策略的点云特征提取算法(Exaction of ringle and ravine.)

实现单尺度retinex算法，用于图像的对比度增强，对低能见度图像处理效果较好。(Retinex single-scale algorithm for image contrast enhancement, image processing on low visibility is better.)

给定一副图像，采用一定的策略对其进行搜索以确定其中是否含有人脸，如果是则返回一脸的位置、大小和姿态(人脸检测)

说明：  快速磁共振成像领域的GRAPPA（generalized auto-calibrating partially parallel acquisitions）算法实现(GRAPPA realization in fast MRI)

说明：  图像滤波，中值滤波，自适应，对比结果，图像去燥使用(Image filtering, median filtering, adaptive, comparative results, medical image use)

提出了两个已知波长的消光系数比来表征气溶胶粒子对入射激光衰减特性的方法。(Two known wavelengths of the extinction coefficient of light than to represent the attenuation characteristics of the aerosol particles on the incident laser.)