Linux下基于百度智能云平臺(tái)人臉檢測(cè)分析
云平臺(tái)接口
??接口技術(shù)文檔：
網(wǎng)頁功能演示：
2.人臉檢測(cè)屬性分析項(xiàng)目示例
?硬件平臺(tái)： ubuntu18.04、USB免驅(qū)攝像頭 ?圖像渲染： SDL庫 ?開發(fā)語言： C語言
3.攝像頭應(yīng)用框架V4L2示例
#include #include #include #include #include #include "video.h" /*攝像頭應(yīng)用編程框架*/ int Video_Init(u8 *dev,int video_fd,struct video *video_info) { /*1.打開攝像設(shè)備文件*/ video_fd=open(dev,O_RDWR); if(video_fd<0)return -1; /*2.圖像數(shù)據(jù)格式*/ struct v4l2_format video_format; memset(&video_format,0,sizeof(struct v4l2_format)); video_format.type=V4L2_BUF_TYPE_VIDEO_CAPTURE;//捕獲格式 video_format.fmt.pix.width=800; video_format.fmt.pix.height=480; video_format.fmt.pix.pixelformat=V4L2_PIX_FMT_YUYV; if(ioctl(video_fd,VIDIOC_S_FMT,&video_format))return -2; video_info->width=video_format.fmt.pix.width; video_info->height=video_format.fmt.pix.height; printf("圖像尺寸:%d * %dn",video_info->width,video_info->height); /*3.申請(qǐng)空間*/ struct v4l2_requestbuffers video_requestbuffers; memset(&video_requestbuffers,0,sizeof(struct v4l2_requestbuffers)); video_requestbuffers.count=4;//緩沖區(qū)個(gè)數(shù) video_requestbuffers.type=V4L2_BUF_TYPE_VIDEO_CAPTURE;//V4L2捕獲框架格式 video_requestbuffers.memory=V4L2_MEMORY_MMAP;//內(nèi)存映射 if(ioctl(video_fd,VIDIOC_REQBUFS,&video_requestbuffers))return -3; printf("緩沖區(qū)個(gè)數(shù):%dn",video_requestbuffers.count); /*4.將緩沖映射到進(jìn)程空間*/ int i=0; struct v4l2_buffer video_buffer; for(i=0;immap_size=video_buffer.length;/*映射大小*/ video_info->mmapbuf[i]=mmap(NULL,video_buffer.length,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,video_buffer.m.offset); } /*5.將緩沖區(qū)添加到采集隊(duì)列*/ for(i=0;i
4.調(diào)用百度人家屬性分析接示例
// libcurl庫下載鏈接：https://curl.haxx.se/download.html // jsoncpp庫下載鏈接：https://github.com/open-source-parsers/jsoncpp/ const static char * request_url = "https://aip.baidubce.com/rest/2.0/face/v3/detect"; char faceDetect_result[1024]; char faceDetect_result[1024]; /** * 人臉檢測(cè)與屬性分析 * @return 調(diào)用成功返回0，發(fā)生錯(cuò)誤返回其他錯(cuò)誤碼 */ int faceDetect(char *json_result, const char *access_token,const char *image_base64) { //std::string url = request_url + "?access_token=" + access_token; char url[1024]; snprintf(url,sizeof(url),"%s?access_token=%s",request_url,access_token); CURL *curl = NULL; CURLcode result_code; int is_success=0; char iamge[1024*1024]; snprintf(iamge,sizeof(iamge),"{"image":"%s","image_type":"BASE64","face_field":"age,beauty,gender,glasses,eye_status,emotion,race,mask,facetype"}",image_base64); curl = curl_easy_init(); 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,iamge); result_code = curl_easy_perform(curl); FILE *outfile; outfile = fopen("test.cmd", "wb"); curl_easy_setopt(curl, CURLOPT_WRITEDATA, outfile); result_code=curl_easy_perform(curl); fclose(outfile); if (result_code != CURLE_OK) { fprintf(stderr, "curl_easy_perform() failed: %s",curl_easy_strerror(result_code)); is_success = 1; return is_success; } strcpy(json_result,faceDetect_result); curl_easy_cleanup(curl); is_success = 0; } else { fprintf(stderr, "curl_easy_init() failed."); is_success = 1; } return is_success; }
5.base64圖片編碼示例
static const char * base64char = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
char * base64_encode( const unsigned char * bindata, char * base64, int binlength )
{
int i, j;
unsigned char current;
for ( i = 0, j = 0 ; i < binlength ; i += 3 )
{
current = (bindata[i] >> 2) ;
current &= (unsigned char)0x3F;
base64[j++] = base64char[(int)current];
current = ( (unsigned char)(bindata[i] << 4 ) ) & ( (unsigned char)0x30 ) ;
if ( i + 1 >= binlength )
{
base64[j++] = base64char[(int)current];
base64[j++] = '=';
base64[j++] = '=';
break;
}
current |= ( (unsigned char)(bindata[i+1] >> 4) ) & ( (unsigned char) 0x0F );
base64[j++] = base64char[(int)current];
current = ( (unsigned char)(bindata[i+1] << 2) ) & ( (unsigned char)0x3C ) ;
if ( i + 2 >= binlength )
{
base64[j++] = base64char[(int)current];
base64[j++] = '=';
break;
}
current |= ( (unsigned char)(bindata[i+2] >> 6) ) & ( (unsigned char) 0x03 );
base64[j++] = base64char[(int)current];
current = ( (unsigned char)bindata[i+2] ) & ( (unsigned char)0x3F ) ;
base64[j++] = base64char[(int)current];
}
base64[j] = '?';
return base64;
}
int base64_decode( const char * base64, unsigned char * bindata )
{
int i, j;
unsigned char k;
unsigned char temp[4];
for ( i = 0, j = 0; base64[i] != '?' ; i += 4 )
{
memset( temp, 0xFF, sizeof(temp) );
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i] )
temp[0]= k;
}
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i+1] )
temp[1]= k;
}
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i+2] )
temp[2]= k;
}
for ( k = 0 ; k < 64 ; k ++ )
{
if ( base64char[k] == base64[i+3] )
temp[3]= k;
}
bindata[j++] = ((unsigned char)(((unsigned char)(temp[0] << 2))&0xFC)) |
((unsigned char)((unsigned char)(temp[1]>>4)&0x03));
if ( base64[i+2] == '=' )
break;
bindata[j++] = ((unsigned char)(((unsigned char)(temp[1] << 4))&0xF0)) |
((unsigned char)((unsigned char)(temp[2]>>2)&0x0F));
if ( base64[i+3] == '=' )
break;
bindata[j++] = ((unsigned char)(((unsigned char)(temp[2] << 6))&0xF0)) |
((unsigned char)(temp[3]&0x3F));
}
return j;
}
6.JOSN數(shù)據(jù)格式解析示例
/*josn數(shù)據(jù)解析*/
int Josn_Get(const char *buff,struct Faceinfo *face_info)
{
/*創(chuàng)建cJSON對(duì)象*/
cJSON *root=cJSON_CreateObject();
char *p=strstr(buff,"{"error_code"");
root=cJSON_Parse(p);/*載入JSON數(shù)據(jù)*/
if(root==NULL)return -1;
/*2.解析字段*/
cJSON *item;
int i=0;
item=cJSON_GetObjectItem(root,"error_code");
if(item)
{
printf("error_code:%dn",item->valueint);
if(item->valueint)return -2;
}
item=cJSON_GetObjectItem(root,"error_msg");
if(item)
{
printf("error_code:%sn",item->valuestring);
}
item=cJSON_GetObjectItem(root,"result");
if(item)
{
cJSON *obj;
obj=cJSON_GetObjectItem(item, "face_num");
printf("face_num:%dn",obj->valueint);
item=cJSON_GetObjectItem(item,"face_list");
if(item)
{
int arraysize=cJSON_GetArraySize(item);/*獲取數(shù)組成員個(gè)數(shù)*/
for(i=0;ivaluestring);
obj=cJSON_GetObjectItem(array_item,"location");
if(obj)
{
cJSON *data;
data=cJSON_GetObjectItem(obj, "left");
printf("left:%fn",data->valuedouble);
face_info->x=data->valuedouble;
data=cJSON_GetObjectItem(obj, "top");
printf("top:%fn",data->valuedouble);
face_info->y=data->valuedouble;
data=cJSON_GetObjectItem(obj, "width");
printf("width:%fn",data->valuedouble);
face_info->w=data->valuedouble;
data=cJSON_GetObjectItem(obj, "height");
printf("height:%fn",data->valuedouble);
face_info->h=data->valuedouble;
data=cJSON_GetObjectItem(obj, "face_probability");
}
obj=cJSON_GetObjectItem(array_item,"face_probability");
//printf("probability=%dn",obj->valueint);
obj=cJSON_GetObjectItem(array_item,"age");
//printf("年齡=%dn",obj->valueint);
face_info->age=obj->valueint;
obj=cJSON_GetObjectItem(array_item,"beauty");
if(obj!=NULL)
{
//printf("顏值=%fn",obj->valuedouble);
face_info->beauty=obj->valuedouble;
}
obj=cJSON_GetObjectItem(array_item,"gender");//性別
if(obj)
{
cJSON *data;
data=cJSON_GetObjectItem(obj,"type");
if(strcmp(data->valuestring,"male")==0)
{
//printf("性別:男n");
strcpy(face_info->gender,"男");
}
else if(strcmp(data->valuestring,"female")==0)
{
//printf("性別:女n");
strcpy(face_info->gender,"女");
}
}
obj=cJSON_GetObjectItem(array_item,"glasses");//是否帶眼鏡
if(obj)
{
cJSON *data;
data=cJSON_GetObjectItem(obj,"type");
if(strcmp(data->valuestring,"none")==0)
{
//printf("眼鏡:無n");
strcpy(face_info->glasses,"無");
}
else if(strcmp(data->valuestring,"common")==0)
{
//printf("眼鏡:普通眼鏡n");
strcpy(face_info->glasses,"普通眼鏡");
}
else if(strcmp(data->valuestring,"sun")==0)
{
//printf("眼鏡:墨鏡n");
strcpy(face_info->glasses,"墨鏡");
}
}
obj=cJSON_GetObjectItem(array_item,"emotion");//表情
if(obj)
{
cJSON *data;
data=cJSON_GetObjectItem(obj,"type");
if(strcmp(data->valuestring,"angry")==0)
{
//printf("表情:憤怒n");
strcpy(face_info->emotion,"憤怒");
}
else if(strcmp(data->valuestring,"disgust")==0)
{
//printf("表情:厭惡n");
strcpy(face_info->emotion,"厭惡");
}
else if(strcmp(data->valuestring,"fear")==0)
{
//printf("表情:恐懼n");
strcpy(face_info->emotion,"恐懼");
}
else if(strcmp(data->valuestring,"happy")==0)
{
//printf("表情:高興n");
strcpy(face_info->emotion,"高興");
}
else if(strcmp(data->valuestring,"sad")==0)
{
//printf("表情:傷心n");
strcpy(face_info->emotion,"傷心");
}
else if(strcmp(data->valuestring,"surprise")==0)
{
//printf("表情:驚訝n");
strcpy(face_info->emotion,"驚訝");
}
else if(strcmp(data->valuestring,"neutral")==0)
{
//printf("表情:無表情n");
strcpy(face_info->emotion,"無表情");
}
else if(strcmp(data->valuestring,"pouty")==0)
{
//printf("表情:噘嘴n");
strcpy(face_info->emotion,"噘嘴");
}
else if(strcmp(data->valuestring,"grimace")==0)
{
//printf("表情:鬼臉n");
strcpy(face_info->emotion,"鬼臉");
}
}
obj=cJSON_GetObjectItem(array_item,"mask");//是否帶口罩
if(obj)
{
cJSON *data;
data=cJSON_GetObjectItem(obj,"type");
//printf("是否帶口罩:%dn",data->valueint);
if(data->valueint)strcpy(face_info->mask,"是");
else strcpy(face_info->mask,"否");
}
obj=cJSON_GetObjectItem(array_item,"face_type");
if(obj)
{
cJSON *data;
data=cJSON_GetObjectItem(obj,"type");
if(strcmp(data->valuestring,"human")==0)
{
printf("真實(shí)人臉n");
}
else if(strcmp(data->valuestring," cartoon")==0)
{
printf("卡通人臉n");
}
}
}
}
}
cJSON_Delete(root);//釋放空間
return 0;
}
7.調(diào)用SDL庫圖像渲染
int main()
{
struct Faceinfo face_info={0};
int w,h;
/*初始化攝像頭*/
video_fd=Video_Init(CAMERA_DEV,video_fd,&video_info);
if(video_fd<=0)
{
printf("攝像頭初始化失敗,res=%dn",video_fd);
return 0;
}
/*TTF 初始化*/
TTF_Init();
/*打開字庫*/
TTF_Font *ttffont=TTF_OpenFont("方正粗黑宋簡體.ttf",30);
if(ttffont==NULL)
{
printf("字庫打開失敗n");
return 0;
}
SDL_Color color={255,0,128,255};/*字體顏色 RGBA*/
/*創(chuàng)建窗口 */
SDL_Window *window=SDL_CreateWindow("人臉檢測(cè)分析", SDL_WINDOWPOS_CENTERED,SDL_WINDOWPOS_CENTERED,800,480,SDL_WINDOW_ALLOW_HIGHDPI|SDL_WINDOW_SHOWN);
SDL_GetWindowSize(window,&w,&h);
/*創(chuàng)建渲染器*/
SDL_Renderer *render=SDL_CreateRenderer(window,-1,SDL_RENDERER_ACCELERATED);
/*清空渲染器*/
SDL_RenderClear(render);
printf("圖像尺寸:%d * %dn",video_info.width,video_info.height);
/*創(chuàng)建紋理*/
SDL_Texture*sdltext=SDL_CreateTexture(render,SDL_PIXELFORMAT_RGB24,SDL_TEXTUREACCESS_STREAMING,video_info.width,video_info.height);
/*創(chuàng)建攝像頭采集線程*/
u8 *rgb_data=malloc(video_info.height*video_info.width*3);
rgb_buff=malloc(video_info.height*video_info.width*3);//保存RGB顏色數(shù)據(jù)
u8 *jpg_data=malloc(video_info.height*video_info.width*3);//保存RGB顏色數(shù)據(jù)
u8 *imagebase64_data=malloc((video_info.height*video_info.width*3)*8/6);//保存RGB顏色數(shù)據(jù)
int jpg_size;
//printf("size=%dn",video_info.mmap_size);
video_flag=1;/*攝像頭采集標(biāo)志*/
pthread_t pthid;
pthread_create(&pthid,NULL,Video_CollectImage, NULL);
bool quit=true;
SDL_Event event;
SDL_Rect rect;
int display_stat=1;
char buff[100];
while(quit)
{
while(SDL_PollEvent(&event))/*事件監(jiān)測(cè)*/
{
if(event.type==SDL_QUIT)/*退出事件*/
{
quit=false;
video_flag=0;
pthread_cancel(pthid);/*殺死指定線程*/
continue;
}
else if(event.type==SDL_MOUSEBUTTONDOWN)/*點(diǎn)擊事件*/
{
if(event.button.button==SDL_BUTTON_LEFT)/*左鍵*/
{
pthread_mutex_lock(&fastmutex);//互斥鎖上鎖
pthread_cond_wait(&cond,&fastmutex);
memcpy(rgb_data,rgb_buff,video_info.height*video_info.width*3);
pthread_mutex_unlock(&fastmutex);//互斥鎖解鎖
jpg_size=rgb_to_jpeg(video_info.width,video_info.height,video_info.height*video_info.width*3,rgb_data,jpg_data, 80);//RGB轉(zhuǎn)JPG
base64_encode(jpg_data, imagebase64_data, jpg_size);
char json_result[1024];
int res=0;
res=faceDetect(json_result,access_token,imagebase64_data);
FILE *fp=fopen("test.cmd","rb");
if(fp==NULL)continue;
struct stat statbuf;
int size=0;
stat("test.cmd", &statbuf);
char *data=malloc(statbuf.st_size+1);
size=fread(data,1,statbuf.st_size,fp);
data[size]='?';
fclose(fp);
//SDL_ttfDisplayFont(10,10,window,ttffont,45,color,"字庫測(cè)試",render);
display_stat=0;
if(Josn_Get(data,&face_info))
{
display_stat=1;
continue;
}
printf("年齡:%dn",face_info.age);
printf("顏值:%fn",face_info.beauty);
printf("性別:%sn",face_info.gender);
printf("表情:%sn",face_info.emotion);
printf("是否戴眼鏡:%sn",face_info.glasses);
printf("是否戴口罩:%sn",face_info.mask);
SDL_SetRenderDrawColor(render,255,0,0, 255);// 透明值
SDL_Rect rect;
rect.x=face_info.x;
rect.y=face_info.y;
rect.w=face_info.w;
rect.h=face_info.h;
SDL_UpdateTexture(sdltext,NULL,rgb_data, video_info.width*3);
SDL_RenderCopyEx(render, sdltext,NULL,NULL,0,NULL,SDL_FLIP_HORIZONTAL);
SDL_RenderDrawRect(render,&rect);
int y=80;
snprintf(buff,sizeof(buff),"年齡：%d",face_info.age);
size=SDL_ttfDisplayFont(w-300,y,window,ttffont,30,color,buff,render);
y+=size;
snprintf(buff,sizeof(buff),"顏值：%.2f",face_info.beauty);
size=SDL_ttfDisplayFont(w-300,y,window,ttffont,30,color,buff,render);
y+=size+10;
snprintf(buff,sizeof(buff),"性別：%s",face_info.gender);
size=SDL_ttfDisplayFont(w-300,y,window,ttffont,30,color,buff,render);
y+=size+10;
snprintf(buff,sizeof(buff),"表情：%s",face_info.emotion);
size=SDL_ttfDisplayFont(w-300,y,window,ttffont,30,color,buff,render);
y+=size+10;
snprintf(buff,sizeof(buff),"是否戴眼鏡：%s",face_info.glasses);
size=SDL_ttfDisplayFont(w-300,y,window,ttffont,30,color,buff,render);
y+=size+10;
snprintf(buff,sizeof(buff),"是否戴口罩：%s",face_info.mask);
size=SDL_ttfDisplayFont(w-300,y,window,ttffont,30,color,buff,render);
SDL_RenderPresent(render); // 渲染
free(data);
}
else if(event.button.button==SDL_BUTTON_RIGHT)/*右鍵*/
{
printf("右鍵按下n");
display_stat=1;
}
}
}
if(!video_flag)
{
quit=false;
continue;
}
pthread_mutex_lock(&fastmutex);//互斥鎖上鎖
pthread_cond_wait(&cond,&fastmutex);
memcpy(rgb_data,rgb_buff,video_info.height*video_info.width*3);
pthread_mutex_unlock(&fastmutex);//互斥鎖解鎖
SDL_UpdateTexture(sdltext,NULL,rgb_data, video_info.width*3);
//SDL_RenderCopy(render, sdltext, NULL,NULL); // 拷貝紋理到渲染器
SDL_RenderCopyEx(render, sdltext,NULL,NULL,0,NULL,SDL_FLIP_HORIZONTAL);
if(display_stat)SDL_RenderPresent(render); // 渲染
}
SDL_DestroyTexture(sdltext);/*銷毀紋理*/
SDL_DestroyRenderer(render);/*銷毀渲染器*/
SDL_DestroyWindow(window);/*銷毀窗口 */
SDL_Quit();/*關(guān)閉SDL*/
pthread_mutex_destroy(&fastmutex);/*銷毀互斥鎖*/
pthread_cond_destroy(&cond);/*銷毀條件變量*/
free(rgb_buff);
free(rgb_data);
}
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