In addition , comparisons of preprocessing methods between color images and gray images are made . chapter 5 gives a set of new algorithms 第四章主要介绍彩色显微图像的预处理，与灰度图像处理相比较，开发适合彩色图像处理的算法。
This dissertation mainly studies the approaches to frontal face detection and recognition in gray images . the main contributions are as follows : 1 本文对于灰度图像中正面人脸的自动检测与识别问题进行了深入研究，主要工作及贡献如下： 1
3d surface reconstruction software based on 2d gray images has been developed with visual c + + programming language on the platform of windows operation system 并在windows操作平台上，采用vc + +编程技术，开发研制了基于二维图像灰度信息的三维曲面重构软件。
Evaluation method is formed , in which jamming effects and performances of suppression methods can be evaluated by gray image , snr and correlation coefficient 并形成了基于复图像的评估方法,即以灰度图、信噪比和相关系数来评估干扰效果及后续干扰方法的优劣。
Some properties of the generalized morphological transform provide the basis for establishing a new morphological sampling scheme for both binary and gray image 在广义形态变换性质研究的基础上所提出的广义形态采样方法，能更好地保留图像的形态信息和边缘信息。
The thesis studies a series of digital halftoning technique on discussing object of gray image , based on analyzing domestic and foreign digital halftoning techniques 本论文是在对国内外已有的数字半色调技术分析基础上，以灰度图像为研究对象，对该技术进行了研究。
Fingerprint image can be filtered by a filter , which is changed by direction . then gray image is changed to binary image with a local smoothing self - adapted binary algorithm 能够对指纹图像进行带方向的滤波，然后使用改进的局部平滑自适应阈值法，对指纹图像进行二值化处理。
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。
As a special for color images , gray images can also be processed easily with the library . chapter 1 gives a short introduction to images , micrographs and medical micrograph analysis system 本文第一章主要是关于图像、医学图像和医学显微图像分析系统的概述，简单介绍一下相关概念。
Background condition for fruit grading is simple . on the basis of stretch transform of gray level , gray image can be binarized ideally if given a overall gray segmentation threshold 水果分级的背景条件较为简单，在灰度拉伸变换的基础上，使用单一的全局阈值就可以进行较为理想的二值分割。
