几何不变矩在图像处理和识别中具有很重要的作用，HU矩-Geometric moment invariants in image processing and recognition has a very important role, HU moments

本文介绍了，生物概念以及生物识别几大类：指纹识别、手掌几何识别、视网膜识别、声音识别、静脉识别、步态识别。-This article describes the biological concept and biometric categories: fingerprint recognition, hand geometry recognition, retina recognition, voice recognition, vein recognition, gait recognitio