智能家居项目（八）之树莓派+摄像头进行人脸识别
目录
1、编辑Camera.c
2、编辑contrlDevices.h
3、编辑mainPro.c
4、进行编译：
5、运行结果： ./test1
6、项目图片演示
智能家居项目（七）之Libcurl库与HTTPS协议实现人脸识别_Love小羽的博客-CSDN博客
经过上一篇文章，写的代码是在Ubuntu系统中写的，这回把代码搬到树莓派上进行测试
直接上代码
1、编辑Camera.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>
#include "contrlDevices.h"#define true 1
#define false 0typedef typedef unsigned int bool;
char buf[10240] = {'\0'};//全局变量，用来接收从OCR后台返回的数据
char* getFace1();
void postUrl();char* getPicBase64FromFile(char *filePath);
struct Devices *addCameraContrlToDeviceLink(struct Devices *phead);size_t readData(void *ptr,size_t size,size_t nmemb,void *stream) //回调函数
{ strncpy(buf,ptr,1024);
}char *getFace1()
{ printf("Taking pictures...\n"); system("raspistill -q 5 -t 1 -o image.jpg"); //-q 是图片质量，在0~100之间，我们调成5，压缩图片质量,生成的照片名字为imag.jpg //-t 是拍照延时，设定1s后拍照 while (access("./image.jpg", F_OK) != 0) ; //判断是否拍照完毕 printf("拍照完成\n"); char *base64BufFaceRec = getPicFromOCRBase641("./image.jpg"); // system("rm image.jpg"); return base64BufFaceRec; //返回刚才拍照的base64}while (access("./image.jpg", F_OK) != 0); //判断是否拍照完毕printf("Photo taking completed\n");char *base64BufFaceRec = getPicBase64FromFile("./image.jpg");return base64BufFaceRec; //返回刚才拍照的base64
}char* getPicBase64FromFile(char *filePath) //获取图片的base64流
{ 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;
}void postUrl()
{ CURL *curl; CURLcode res; char *postString;char* key = "自行购买翔云平台购买人脸识别后的key";//翔云平台购买人脸识别后的keychar* secret = "自行购买翔云平台购买人脸识别后的secret";//翔云平台购买人脸识别后的secretint typeId = 21;char* format = "xml";char *bufPic1 = getFace1(); char *bufPic2 = getPicBase64FromFile("./5.jpg");int len = strlen(key)+strlen(secret)+strlen(bufPic1)+strlen(bufPic2)+124; //分配空间不够会导致栈溢出postString = (char *)malloc(len); //因为postString是一个指针，不能用sizeof来计算其指向的大小memset(postString,'\0',len);sprintf(postString,"img1=%s&img2=%s&key=%s&secret=%s&typeId=%d&format=%s", bufPic1,bufPic2,key,secret,typeId,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url curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,readData); //将返回的http头输出到fp指向的文件 res = curl_easy_perform(curl); //类似于状态码printf("OK:%d\n",res);if(strstr(buf,"是") != NULL) //判断翔云后台返回的字符串中有没有“是”{ printf("the same Person\n");}else{ printf("diff Person\n"); }curl_easy_cleanup(curl); }
}struct Devices cameraContrl = { .deviceName = "camera", .justDoOnce = postUrl,.getFace = getFace1,.getPicBase64FromFile = getPicBase64FromFile,.readData = readData,.next = NULL
};struct Devices *addCameraContrlToDeviceLink(struct Devices *phead)
{ if(phead == NULL){ return &cameraContrl; }else{ cameraContrl.next = phead; phead = &cameraContrl;} return phead;
}2、编辑contrlDevices.h
//设备工厂
#include <wiringPi.h>
#include <stdlib.h>struct Devices
{char deviceName[128];int status;int pinNum;int (*open)(int pinNum);int (*close)(int pinNum);void (*justDoOnce)(); //用于摄像头char* (*getFace)(); //用于摄像头char* (*getPicBase64FromFile)(); //用于摄像头size_t (*readData)(); //用于摄像头int (*deviceInit)(int pinNum);int (*readStatus)(int pinNum);int (*changeStatus)(int status);struct Devices *next;
};struct Devices* addBathroomLightToDeviceLink(struct Devices *phead);
struct Devices* addUpstairLightToDeviceLink(struct Devices *phead);
struct Devices* addLivingRoomLightToDeviceLink(struct Devices *phead);
struct Devices* addRestaurantLightToDeviceLink(struct Devices *phead);
struct Devices* addFireToDeviceLink(struct Devices *phead);
struct Devices* addCameraContrlToDeviceLink(struct Devices *phead);3、编辑mainPro.c
#include "contrlDevices.h"
#include "InputCommand.h"
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>struct Devices *pdeviceHead = NULL; //设备工厂
struct InputCommander *pCommandHead = NULL; //指令工厂
struct InputCommander *socketHandler = NULL;
int c_fd;
struct Devices *cameraThrad = NULL;
typedef unsigned int bool;struct Devices* findDeviceByName(char *name,struct Devices *phead)
{struct Devices *tmp = phead;if(phead == NULL){return NULL;}else{while(tmp != NULL){if(strcmp(tmp->deviceName,name) == 0){return tmp;}tmp = tmp->next;}return NULL;}
}struct InputCommander* findCommandByName(char *name,struct InputCommander *phead)
{struct InputCommander *tmp = phead;if(phead == NULL){return NULL;}else{while(tmp != NULL){if(strcmp(tmp->commandName,name) == 0){return tmp;}tmp = tmp->next;}return NULL;}
}void *voice_thread(void* datas)
{ int nread;printf("voice_thread\n");struct InputCommander *voiceHandler;voiceHandler = findCommandByName("voice",pCommandHead);if(voiceHandler == NULL){printf("find voiceHandler error\n");pthread_exit(NULL);}else{if(voiceHandler->Init(voiceHandler,NULL,NULL) < 0){printf("voice init error\n");pthread_exit(NULL);}else{printf("%s init success\n",voiceHandler->commandName);}while(1){nread = voiceHandler->getCommand(voiceHandler);if(nread == 0){printf("nodata form vocie\n");}else{printf("do divece contrl:%s\n",voiceHandler->command);}}}
}void *read_thread(void* datas)
{int n_read;printf("have user connect\n");memset(socketHandler->command,'\0',sizeof(socketHandler->command));while(1){n_read = read(c_fd,socketHandler->command,sizeof(socketHandler->command));if(n_read == -1){perror("read");}else if(n_read > 0){printf("\nget: %d,%s\n",n_read,socketHandler->command);memset(socketHandler->command,'\0',sizeof(socketHandler->command));}else{printf("client quit\n"); }}
}void *socket_thread(void* datas)
{int n_read = 0;printf("socket_thread\n");pthread_t readThrad;struct sockaddr_in c_addr;memset(&c_addr,0,sizeof(struct sockaddr_in));int clen = sizeof(struct sockaddr_in);socketHandler = findCommandByName("socketServer",pCommandHead);if(socketHandler == NULL){printf("find socketServerHandler error\n");pthread_exit(NULL);}else{printf("%s init success\n",socketHandler->commandName);}socketHandler->Init(socketHandler,NULL,NULL);while(1){c_fd = accept(socketHandler->sfd,(struct sockaddr *)&c_addr,&clen);pthread_create(&readThrad,NULL,read_thread,NULL);}
}void *cameraThread_func(void* data)//起线程的函数有格式要求
{struct Devices *cameraTemp;cameraTemp = findDeviceByName("camera", pdeviceHead); //摄像头的设备编号为c1if(cameraTemp == NULL){ //防止段错误的必需判断，当给指针赋值是，一定要考虑NULL的情况，否则后续操作都是空谈printf("find camera error\n");pthread_exit(NULL); //在线程中不用return}cameraTemp->justDoOnce(); //设备都要从工厂里面取出来.可不能camera.justDoOnce,谁认识你这个camera!
}int main()
{char name[128];struct Devices *tmp = NULL;pthread_t voiceThread;pthread_t socketThread;pthread_t cameraThread;if(-1 == wiringPiSetup()){return -1;} //1、设备工厂初始化pdeviceHead = addBathroomLightToDeviceLink(pdeviceHead);pdeviceHead = addUpstairLightToDeviceLink(pdeviceHead);pdeviceHead = addLivingRoomLightToDeviceLink(pdeviceHead);pdeviceHead = addRestaurantLightToDeviceLink(pdeviceHead);pdeviceHead = addFireToDeviceLink(pdeviceHead);pdeviceHead = addCameraContrlToDeviceLink(pdeviceHead); //摄像头pCommandHead = addvoiceContrlToInputCommandLink(pCommandHead);//声音pCommandHead = addSocketContrlToInputCommandLink(pCommandHead);//2、语音线程池建立/*int pthread_create(pthread_t *thread, const pthread_attr_t *attr,void *(*start_routine) (void *), void *arg);*/pthread_create(&voiceThread,NULL,voice_thread,NULL);//3、socket线程池建立pthread_create(&socketThread,NULL,socket_thread,NULL);//4、 摄像头线程pthread_create(&cameraThread,NULL,cameraThread_func,NULL);//5、 火灾线程//线程等待pthread_join(voiceThread,NULL);pthread_join(socketThread,NULL);pthread_join(cameraThread,NULL);return 0;
}4、进行编译：
gcc mainPro.c upstairLight.c bathroomLight.c fire.c livingroomLight.c socketContrl.c restaurantLight.c camera.c voiceContrl.c -lwiringPi -lpthread -I ./curl-7.71.1/_install/include/ -L ./curl-7.71.1/_install/lib/ -lcurl -o test1
5、运行结果： ./test1
结果显示diff Person，说明人脸识别失败了，我也尝试了很多次，都没有成功，有可能是我放在树莓派里的本人照片和用摄像头拍的本人照片，差别较大的缘故吧，但是程序是可以正常运行的。
6、项目图片演示
