This dissertation mainly studies approaches to real time frontal face detection and recognition . and an automated face recognition simulation system is established in the end 本文对灰度图像中正面人脸的实时检测和识别问题进行了详细研究，并实现了一个人脸自动识别仿真系统。
The eigen skin - color method is for the color images . for gray images , this paper uses face recognition method based on hidden markov models to detect human faces 特征肤色的方法是针对彩色图像的人脸检测方法，针对灰度图像本文采用基于隐马尔可夫模型的人脸识别方法来检测人脸。
In ndt fields , ict ( industrial computed tomography ) can get the 2d tomogram and the technician can get the information of the location , the shape and the area of the details 工业ct在无损状态下能获得被检断面的二维灰度图像，从图像上可以直观地看到目标细节的位置、形状、大小。
With euclid distance computed in hsv space , color image is translated into grayscale image , which segmentation methods can be applied in to partition the vehicle from the background 通过在hsv彩色空间计算欧式距离,把彩色图像转换为灰度图像,然后利用灰度图像的分割方法对车辆进行分割。
Experimental results show that embedded watermark has a certain capacity and robustness . a virtual channel technique , which is based on frequency hopping technique , is proposed in chapter 5 第五章借鉴跳频思想提出了虚拟通道技术,并据此设计了一种在载体中嵌入灰度图像作为水印的算法。
Edge detection of image is one of the most elementary techniques in the field of the image processing and vision computing . main methods on image edge detection are researched in this paper 图像的边缘检测是图像处理的主要内容之一，本文基于灰度图像边缘检测中的主要方法进行了分析研究。
To fit the special character recognition , preprocess sequence is adjusted as : line segmentation under the gray level image , image enhance , binary , character segmentation 针对身份证识别的特殊性，调整了预处理顺序：先在灰度图像下完成行分割、再进行图像增强、二值化，然后才作单字分割。
We provide the algorithm of line segmentation under gray level image and character segmentation based on the biggest width backtracking algorithm to get the accurate position of characters 文中提出了灰度图像下的行分割方法和基于最大宽度回溯算法的单字分割算法，从而实现了字符的精确定位。
