Question

求教opencv人脸识别中Haar特征值的计算

Answer 1

#include <stdio.h>
#include <string.h>
#include "cv.h"
#include "cvaux.h"
#include "highgui.h"

using namespace cv;

//globle variables
int nTrainFaces = 0; // number of trainning images
int nEigens = 0; // number of eigenvalues
IplImage** faceImgArr = 0; // array of face images
CvMat* personNumTruthMat = 0; // array of person numbers
IplImage* pAvgTrainImg = 0; // the average image
IplImage** eigenVectArr = 0; // eigenvectors
CvMat* eigenValMat = 0; // eigenvalues
CvMat* projectedTrainFaceMat = 0; // projected training faces

//// Function prototypes
void learn();
void recognize();
void doPCA();
void storeTrainingData();
int loadTrainingData(CvMat** pTrainPersonNumMat);
int findNearestNeighbor(float* projectedTestFace);
int loadFaceImgArray(char* filename);
void printUsage();

int main( int argc, char** argv )
{
if((argc != 2) && (argc != 3)){
printUsage();
return -1;
}

if( !strcmp(argv[1], "train" )){
learn();
} else if( !strcmp(argv[1], "test") ){
recognize();
} else {
printf("Unknown command: %s\n", argv[1]);
}
return 0;
}

void printUsage(){
printf("Usage: eigenface <command>\n",
" Valid commands are\n"
" train\n"
" test\n"
);
}

void learn(){
int i;

// load training data
nTrainFaces = loadFaceImgArray("train.txt");
if( nTrainFaces < 2){
fprintf(
stderr,
"Need 2 or more training faces\n"
"Input file contains only %d\n",
nTrainFaces