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liveness_detection.c
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liveness_detection.c
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#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <string.h>
#include <time.h>
#include <math.h>
#include <stdbool.h>
const int IMG_HEIGHT = 345;
const int IMG_WIDTH = 400;
const int ITER = 10000; // 随机取点次数
const float PLANE_OR_NOT = 0.1; // 判断是否为平面的分界线
typedef unsigned short UNIT16;
int readFileList(char *basePath)
{
DIR *dir;
struct dirent *ptr;
char base[30];
char *title;
char *p=".raw"; //需要的子串;
char *prec_face[4];
// char *padd="/";
char Deepfile_raw[100];
char *ptr2;
UNIT16 MatDATA[IMG_HEIGHT*IMG_WIDTH];
FILE *fp = NULL;
int DeepDATA[3][IMG_HEIGHT*IMG_WIDTH];
int length;
int n;
int i,j;
int rec_face[4];
int COL ,ROW ,FACE_WIDTH ,FACE_HEIGHT ;
int FaceDATA[3][40000];
int faceno0_num ;
int sigma = 1;
int pretotal; // 符合拟合模型的数据的个数
int x[3],y[3],z[3]; // 随机取三个点
float a,b,c; // 拟合平面方程 z=ax+by+c
// float besta,bestb,bestc; // 最佳参数
int rand_num[3];
float check,distance;
int total;
if ((dir=opendir(basePath)) == NULL)
{
perror("Open dir error...");
exit(1);
}
while ((ptr=readdir(dir)) != NULL)
{
strcpy(base, ptr->d_name);
if(strstr(base,p))
{
// printf("%s\n",base);
// printf("%s\n",basePath);
strcpy(Deepfile_raw, basePath);
// printf("%s\n",Deepfile_raw);
// strcat(Deepfile_raw, padd);
strcat(Deepfile_raw, base);
printf("%s\n",Deepfile_raw);
ptr2 = strtok(base, "_");
for(n = 0; n < 5; n++)
{
// rec_face[n] = atoi(ptr2);
prec_face[n] = ptr2;
ptr2 = strtok(NULL, "_");
}
for(n = 0; n < 4; n++)
{
rec_face[n] = atoi(prec_face[n+1]);
}
// printf("%d,%d,%d,%d\n",rec_face[0],rec_face[1],rec_face[2],rec_face[3]);
// 从.raw读取二进制16位数据到MatDATA
fp = fopen( Deepfile_raw, "rb" );
fread(MatDATA,sizeof(UNIT16),IMG_HEIGHT*IMG_WIDTH,fp);
fclose(fp);
// length = sizeof(MatDATA) / sizeof(UNIT16);
// printf("数组的长度为: %d\n",length); //length 应为IMG_HEIGHT*IMG_WIDTH
// n = 0;
// DeepDATA三行分别为深度图行数，列数，深度信息
// for(i=1;i< IMG_HEIGHT+1 ;i++)
// {
// for(j=1;j< IMG_WIDTH+1 ;j++)
// {
// DeepDATA[0][n] = i;
// DeepDATA[1][n] = j;
// DeepDATA[2][n] = MatDATA[n];
// n += 1;
// }
// }
// int test1 = 110194 ;
// printf("%d,%d,%d\n",DeepDATA[0][test1],DeepDATA[1][test1],DeepDATA[2][test1]);
// FaceDATA为深度图DeepDATA裁剪后且去除零深度信息后的人脸部分
// n = 0;
COL = rec_face[0],ROW = rec_face[1],FACE_WIDTH = rec_face[2],FACE_HEIGHT = rec_face[3]; //位置信息
// txt :157 66 172 198 , 取行66：66+198,列取157：157+172
faceno0_num = FACE_HEIGHT*FACE_WIDTH -1;
n = 0;
for(i = 1;i< FACE_HEIGHT+1;i++)
{
for(j= 1;j< FACE_WIDTH+1;j++)
{
if (MatDATA[IMG_WIDTH*(ROW+i-2)+COL+j-2] == 0)
{
faceno0_num -= 1; // 非零深度点个数为 faceno0_num+1
continue;
}
FaceDATA[1][n] = i;
FaceDATA[0][n] = j;
FaceDATA[2][n] = MatDATA[IMG_WIDTH*(ROW+i-2)+COL+j-2];
n += 1;
}
}
int test = 100;
// printf("%d,%d,%d,%d\n",test,FaceDATA[0][test],FaceDATA[1][test],FaceDATA[2][test]);
srand((unsigned)time(NULL));
pretotal = 0;
total = 0;
for(i = 0; i < ITER; i++)
{
do{
rand_num[0] = rand()%faceno0_num;
rand_num[1] = rand()%faceno0_num;
rand_num[2] = rand()%faceno0_num;
}while(rand_num[0] == rand_num[1] || rand_num[0] == rand_num[2] || rand_num[1] == rand_num[2]);
for(n = 0; n < 3; n++ )
{
x[n] = FaceDATA[0][rand_num[n]];
y[n] = FaceDATA[1][rand_num[n]];
z[n] = FaceDATA[2][rand_num[n]];
// printf("%d,%d,%d,%d\n", x[n],y[n],z[n],n);
}
check = (x[0]-x[1])*(y[0]-y[2]) - (x[0]-x[2])*(y[0]-y[1]);
if ( check == 0) // 防止提示浮点数例外 (核心已转储)
{
i -= 1;
continue;
}
a = ( (z[0]-z[1])*(y[0]-y[2]) - (z[0]-z[2])*(y[0]-y[1]) )*1.0/( (x[0]-x[1])*(y[0]-y[2]) - (x[0]-x[2])*(y[0]-y[1]) );
if (y[0] == y[2]) // 防止提示浮点数例外 (核心已转储)
{
i -= 1;
continue;
}
b = ((z[0] - z[2]) - a * (x[0] - x[2]))*1.0/(y[0]-y[2]);
c = z[0]- a * x[0] - b * y[0];
// printf("%f,%f,%f\n",a,b,c);
total = 0;
for(n = 0; n < faceno0_num +1 ; n++ )
{
distance = fabs(a*FaceDATA[0][n] + b*FaceDATA[1][n] - 1*FaceDATA[2][n] + c*1);
if (distance < sigma)
{
total +=1;
}
}
// printf("%d,%f,%d\n",i,distance,total);
if (total > pretotal) // 找到符合拟合平面数据最多的拟合平面
{
pretotal=total;
// besta = a;
// bestb = b;
// bestc = c;
}
}
float pretotal_ary = pretotal *1.0/ faceno0_num ;
printf("pretotal = %d,_ary = %f,",pretotal,pretotal_ary);
bool IS_FACE;
if (pretotal_ary>PLANE_OR_NOT)
{
IS_FACE = false;
printf("不是人脸\n");
}
else
{
IS_FACE = true;
printf("是人脸\n");
}
}
}
closedir(dir);
}
int main(void)
{
DIR *dir;
char *basePath = "/home/zhoujie/桌面/Release/";
readFileList(basePath);
return 0;
}