PCA人脸识别算法Matlab.docVIP

PCA人脸识别算法Matlab版 2010-11-18 19:30 1.数据准备 function T?=?CreateDatabase(TrainDatabasePath)%?Align a set of face images (the training set T1, T2, ... , TM )%%?Description: This function reshapes all 2D images of the training database%?into 1D column vectors. Then, it puts these 1D column vectors in a row to?%?construct 2D matrix?T.%??%?%?Argument:????? TrainDatabasePath??????-?Path of the training database%%?Returns:?????? T??????????????????????-?A 2D matrix, containing all 1D image vectors.%???????????????????????????????????????? Suppose all P images in the training database?%???????????????????????????????????????? have the same size of MxN. So the length of 1D?%???????????????????????????????????????? column vectors is MN and?T?will be a MNxP 2D matrix.%%?See also: STRCMP, STRCAT, RESHAPE%?Original version by Amir Hossein Omidvarnia, October?2007%????????????????????? Email: aomidvar@ece.ut.ac.ir??????????????????%%%%%%%%%%%%%%%%%%%%%%%%?File managementTrainFiles?=?dir(TrainDatabasePath);Train_Number?=?0;for?i?=?1:size(TrainFiles,1)????if?not(strcmp(TrainFiles(i).name,.)|strcmp(TrainFiles(i).name,..)|strcmp(TrainFiles(i).name,Thumbs.db))???????? Train_Number?=?Train_Number?+?1;?%?Number of all images in the training database???? endend%%%%%%%%%%%%%%%%%%%%%%%%?Construction of 2D matrix from 1D image vectorsT?=?[];for?i?=?1?: Train_Number????????%?I have chosen the name of each image in databases as a corresponding????%?number. However, it is not mandatory!???? str?=?int2str(i);???? str?=?strcat(\,str,.jpg);???? str?=?strcat(TrainDatabasePath,str);???????? img?=?imread(str);???? img?=?rgb2gray(img);???????? [irow icol]?=?size(img);??????? temp?=?reshape(img,irow*icol,1);??? % Reshaping 2D images into 1D image vectors???? T?=?[T temp];?%?T?grows after each turn????????????????????end 2, 样本训练 function [m, A, Eigenfaces]?=?EigenfaceCore(T)%?Use Principle Component Analysis (PCA) to determine the most?%?discriminating feat