树莓派采用翔云实现人脸识别

1.通过翔云平台购买人脸识别接口
个人中心服务列表查看剩余接口次数

2.C语言程序访问接口
需要安装支持ssl的curl库，交叉编译curl库

（1）C语言程序访问接口

#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 2
typedef unsigned int bool;char buf[1024] = {'\0'};size_t readData( void *ptr, size_t size, size_t nmemb, void *stream)
{strncpy(buf,ptr,1024);
}char *ObtainBase64(char *p)
{char *bufPic;char cmp[128]={'\0'};sprintf(cmp,"base64 %s > tmpfile",p);system(cmp);int fd = open("./tmpfile",O_RDWR);int filelen = lseek(fd,0,SEEK_END);lseek(fd,0,SEEK_SET);bufPic = (char *)malloc(filelen+4);memset(bufPic,'\0',filelen+4);read(fd,bufPic,filelen+4);close(fd);system("rm -f tmpfile");return bufPic;}
bool postUrl()
{CURL *curl;CURLcode res;char *postString;char *img1;char *img2;char *key = "自己的翔云平台OCR key";char *secret = "自己的相遇平台 COR secret";int typeld = 21;char *format = "xml";img1 = ObtainBase64("./image1.jpg");img2 = ObtainBase64("./image2.jpg");int len = strlen(img1)+strlen(img2)+strlen(key)+strlen(secret)+128;postString = (char *)malloc(len);memset(postString,'\0',len);sprintf(postString,"&img1=%s&img2=%s&key=%s&secret=%s&typeId=%d&format=%s",img1,img2,key,secret,21,format);curl = curl_easy_init();if (curl){//curl_easy_setopt(curl, CURLOPT_COOKIEFILE, "/tmp/cookie.txt"); // 指定cookie文件curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postString);    // 指定post内curl_easy_setopt(curl, CURLOPT_URL, "https://netocr.com/api/faceliu.do ");   // 指定url库curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, readData);res = curl_easy_perform(curl);printf("ok!%d\n",res);if(strstr(buf,"是") != NULL){printf("Recognition success\n");}else{printf("Recognition failure\n");}curl_easy_cleanup(curl);}return true;
}int main(void)
{postUrl();
}     

（2）获取图片信息并调用接口进行识别程序

#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<stdlib.h>
int main(){char cmd[12];char ret[128]={'\0'};FILE *fp;while(1){printf("请输入open开始人脸识别\n");scanf("%s",cmd);getchar();if(strcmp(cmd,"open") == 0){memset(cmd,'0',sizeof(cmd)/sizeof(char));printf("开始进行人脸识别请勿离开······\n");system("raspistill -t 2000 -o image2.jpg -q 5");  //运用raspistill进行拍照，注意图片不用太大sleep(2);printf("获取人脸数据，正在比对········\n");fp = popen("./cossDemo4","r");  //调用编译好的接口程序，进行识别判断，并且获取输出结果	int nread = fread(ret,128,1,fp);if(strstr(ret,"success") != NULL){printf("识别成功，开锁\n");}else{printf("识别失败\n");}}}return 0;
}