基于树莓派实现人脸识别开锁

人脸识别的环境搭建可以看一下https://blog.csdn.net/weixin_48856218/article/details/124407139?spm=1001.2014.3001.5501
我这里就不再赘述了

翔云方案

翔云官网https://www.netocr.com/
代码编写
需要修改的地方：
填写自己的翔云账号的 key 和 secret ：

    char *key = "";char *secret = "";

修改为自己图片的名称：

    char *bufPic1 = getPicBase64FromFile("./img1.jpg");char *bufPic2 = getPicBase64FromFile("./img2.jpg");

xianyundemo.c

#include <stdio.h>
#include <curl/curl.h>
#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>#define true  1
#define false 0typedef unsigned int bool;char buf[1024] = {'\0'};size_t readData( void *ptr, size_t size, size_t nmemb, void *stream)
{strncpy(buf, ptr, 1024);
//        printf("=======================get Data=========================\n");
//        printf("%s\n",buf);
}char* getPicBase64FromFile(char *filePath)
{char *bufPic;char cmd[128] = {'\0'};sprintf(cmd, "base64 %s > tmpFile",filePath);system(cmd);int fd = open("./tmpFile", O_RDWR);int filelen = lseek(fd, 0, SEEK_END);lseek(fd, 0, SEEK_SET);bufPic = (char *)malloc(filelen + 2);memset(bufPic, '\0', filelen+2);read(fd, bufPic, filelen);close(fd);system("rm -f tmpFile");return bufPic;
}bool postUrl()
{CURL *curl;CURLcode res;char *postString;char *key = "";char *secret = "";int typeId = 21;char *format = "xml";char *bufPic1 = getPicBase64FromFile("./img1.jpg");char *bufPic2 = getPicBase64FromFile("./img2.jpg");int len = strlen(key)+strlen(secret)+strlen(bufPic1)+strlen(bufPic2)+124;postString = (char *)malloc(len);memset(postString, '\0', len);sprintf(postString, "&img1=%s&img2=%s&key=%s&secret=%s&typeId=%d&format=%s",bufPic1,bufPic2,key,secret,21,format);curl = curl_easy_init();if (curl){curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postString);    // 指定post内容curl_easy_setopt(curl, CURLOPT_URL, "https://netocr.com/api/faceliu.do");   // 指定urlcurl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, readData);res = curl_easy_perform(curl);printf("OK:%d\n",res);if(strstr(buf,"是") != NULL){printf("yes\n");}else{printf("no\n");}curl_easy_cleanup(curl);}return true;
}
int main(void)
{postUrl();
}

编译

gcc xianyundemo.c -lcurl -lssl -o xyface

百度方案

官网地址：需要自己注册认证领取免费资源，网上注册教程很多，自行百度
https://login.bce.baidu.com/?redirect=https%3A%2F%2Fconsole.bce.baidu.com%2Fai%2F%3F_%3D1650961199726%26fromai%3D1#/ai/face/report/index~apiId=206
需要修改的地方：
填写自己的百度账号的 key 和 secret ：

        char AK[] = "";char SK[] = "";

修改对应图片名：

        char *image1_base64 = getbase64("img1.jpg");char *image2_base64 = getbase64("img2.jpg");

baidudemo.c

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <curl/curl.h>
#include <cjson/cJSON.h>#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>size_t access_token_callback(void *ptr, size_t size, size_t nmemb, void *stream)
{char *buf = (char *)malloc (size * nmemb + 8 );memset(buf,'\0',size * nmemb + 8);strncpy(buf, ptr, size * nmemb);cJSON *json= cJSON_Parse(buf);char *access_token_result = (char *)stream;strncpy(access_token_result,cJSON_GetObjectItem(json,"access_token")->valuestring,128);//printf("stream:%s\n",(char *)stream);cJSON_Delete(json);free(buf);return size * nmemb;
}
int post_access_token(char *access_token)
{CURL *curl;CURLcode result_code;int error_code = 0;char url[256] = {0};char access_token_url[] = "https://aip.baidubce.com/oauth/2.0/token?grant_type=client_credentials";char AK[] = "";char SK[] = "";char access_token_result[128] = {0};curl = curl_easy_init();if (curl) {//std::string url = access_token_url + "&client_id=" + AK + "&client_secret=" + SK;sprintf(url,"%s&client_id=%s&client_secret=%s",access_token_url,AK,SK);//printf("url: %s\n",url );curl_easy_setopt(curl, CURLOPT_URL, url);curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);curl_easy_setopt(curl, CURLOPT_WRITEDATA, access_token_result);curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, access_token_callback);result_code = curl_easy_perform(curl);if (result_code != CURLE_OK) {fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(result_code));return 1;}//printf("access_token_result:%s\n",access_token_result);strcpy(access_token,access_token_result);curl_easy_cleanup(curl);error_code = 0;} else {fprintf(stderr, "curl_easy_init() failed.");error_code = 1;}return error_code;
}size_t faceMatch_callback(void *ptr, size_t size, size_t nmemb, void *stream) {// 获取到的body存放在ptr中，先将其转换为string格式char *buf = (char *)malloc (size * nmemb + 8 );memset(buf,'\0',size * nmemb + 8);strncpy(buf, ptr, size * nmemb);cJSON *json = cJSON_Parse(buf);printf("data:%s\n",cJSON_Print(json));if(strstr(cJSON_Print(json),"SUCCESS") ==NULL){*((double *)stream) = 0;}else{cJSON *result = cJSON_GetObjectItem(json,"result");//printf("data:%s\n",cJSON_Print(result));      double *faceMatch_result = (double *)stream;*faceMatch_result = cJSON_GetObjectItem(result,"score")->valuedouble;//printf("stream:%f\n",*faceMatch_result);}cJSON_Delete(json);free(buf);return size * nmemb;
}/*** 人脸对比* @return 调用成功返回0，发生错误返回其他错误码*/
int post_faceMatch(double *faceMatch, char *access_token)
{//std::string url = request_url + "?access_token=" + access_token;char url[256] = {0};char request_url[] = "https://aip.baidubce.com/rest/2.0/face/v3/match";sprintf(url,"%s?access_token=%s",request_url,access_token);char *getbase64(char *photoname);char image[] = "\"image\": ";char image_type[] = "\"image_type\": \"BASE64\"";char *image1_base64 = getbase64("img1.jpg");char *image2_base64 = getbase64("img2.jpg");char *params = (char *)malloc(strlen(image1_base64) + strlen(image2_base64)+ 2 * strlen(image) + 2 * strlen(image_type) + 128 );sprintf(params,"[{%s\"%s\", %s}, {%s\"%s\", %s}]",image,image1_base64,image_type,image,image2_base64,image_type);cJSON *json = cJSON_Parse(params);
//      printf("%s\n",cJSON_Print(json));//printf("param : %s\n",params);CURL *curl = NULL;CURLcode result_code;int is_success;curl = curl_easy_init();double faceMatch_result;if (curl) {curl_easy_setopt(curl, CURLOPT_URL, url);curl_easy_setopt(curl, CURLOPT_POST, 1);struct curl_slist *headers = NULL;headers = curl_slist_append(headers, "Content-Type:application/json;charset=UTF-8");curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);//curl_easy_setopt(curl, CURLOPT_POSTFIELDS, params);curl_easy_setopt(curl, CURLOPT_POSTFIELDS, cJSON_Print(json));curl_easy_setopt(curl, CURLOPT_WRITEDATA, &faceMatch_result);curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, faceMatch_callback);result_code = curl_easy_perform(curl);free(image1_base64);free(image2_base64);free(params);cJSON_Delete(json);if (result_code != CURLE_OK) {fprintf(stderr, "curl_easy_perform() failed: %s\n",curl_easy_strerror(result_code));is_success = 1;return is_success;}*faceMatch = faceMatch_result;curl_easy_cleanup(curl);is_success = 0;} else {fprintf(stderr, "curl_easy_init() failed.");is_success = 1;}return is_success;
}char *getbase64(char *photoname)
{char order[128] = {0};char file[32] = {0};char *base64 = NULL;sprintf(order,"base64 %s > %s_base64",photoname,photoname);system(order);sprintf(file,"%s_base64",photoname);int fd = open(file,O_RDWR);int len = lseek(fd,0,SEEK_END);lseek(fd,0,SEEK_SET);base64 = (char *)malloc(len+1);read(fd,base64,len);base64[len] = '\0';//printf("%d\n",strlen(base64));return base64;
}int main ()
{char access_token[128];double faceMatch = 0;post_access_token(access_token);//printf("access_token: %s\n", access_token);post_faceMatch(&faceMatch,access_token);//printf("faceMatch : %f \n",faceMatch);if(faceMatch > 80){printf("yes\n");}else{printf("no\n");}return 0;
}

编译

gcc baidudemo.c -lcurl -lcjson -o bdface

主函数编写

用继电器来连接电磁锁，继电器引脚初始化为输出（OUTPUT），电磁锁吸合，继电器引脚初始化为输出（INPUT），电磁锁松开。
main.c

#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
#include<string.h>
#include<wiringPi.h>void initWiringPi()
{int ret = wiringPiSetup();if(ret == -1){printf("wiringPi初始化失败\n");perror("init");}}int main(int argc, char const *argv[])
{FILE *fp;int n_read;char buff[1280];int num = 0;//1.初始化wiringPi库initWiringPi();//2.初始化门锁（保持闭合的状态）pinMode(24, INPUT);while(1){//3.摄像头拍照，获取一张照片printf("是否进行人脸识别开锁？1是，0否\n");scanf("%d",&num);if(num == 1){printf("准备开启摄像头拍照\n");system("raspistill  -o img2.jpg -q 5");memset(buff,'\0',1280);//清空数据//4.得到照片后和之前的照片进行对比fp = popen("./bdface","r");//（用百度方案）运行人脸识别的程序（两张照片对比，取出结果，是或否）//fp = popen("./xyface","r");//（用翔云方案）//5.读取fp内容，根据结果来判断是否要开锁n_read = fread(buff,1,1280,fp);if(n_read < 0){printf("读取失败\n");perror("n_read");}if(strstr(buff,"yes") != NULL){pinMode(24,OUTPUT);printf("好家伙，是自己人，门已经打开,3s后关闭\n");delay(3000);pinMode(24,INPUT);}else{printf("好家伙,不认识你\n");printf("buff = %s\n",buff);}}}return 0;
}

编译

gcc main.c -lwiringPi -o chack

运行

./chack