face++人脸识别集成方法汇总

乐此不疲

5）初始化SDK
在AppDelegate.m文件中的- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions里添加如下代码
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[FaceppAPI initWithApiKey:API_KEY andApiSecret:API_SECRET andRegion:APIServerRegionCN];
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    [FaceppAPI setDebugMode:YES];
6）创建一个imageView，从相册选择一张图片进行人脸检测
在.h文件
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@interface ViewController : UIViewController<UINavigationControllerDelegate,UIImagePickerControllerDelegate>
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{
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    UIImagePickerController *imagePicker;
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}
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@property (weak, nonatomic) IBOutlet UIImageView *imageView;
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- (IBAction)PickFromPhoto:(id)sender;
在.m文件
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- (IBAction)PickFromPhoto:(id)sender {
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    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
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        imagePicker.delegate = self;
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        imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
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        [self presentModalViewController:imagePicker animated:YES];
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    }
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}
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-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
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{
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    UIImage *sourceImage = info[UIImagePickerControllerOriginalImage];
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    [self performSelectorInBackground:@selector(detectWithImage:) withObject: sourceImage];
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    [picker dismissModalViewControllerAnimated:YES];
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}
7）根据相册选择的图片进行人脸检测
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- (void)detectWithImage:(UIImage *)image{
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    FaceppResult *result = [[FaceppAPI detection]detectWithURL:nil orImageData:UIImageJPEGRepresentation(image, 0.5) mode:FaceppDetectionModeNormal attribute:FaceppDetectionAttributeNone];
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}
8）获取人脸的大小范围
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if (result.success) {
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        double image_width = [[result content][@"img_width"]doubleValue]*0.01f;
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        double image_height = [[result content][@"img_height"]doubleValue]*0.01f;
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int face_count = [[result content][@"face"]count];
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        for (int i = 0; i<face_count; i++) {
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            double width = [[result content][@"face"][i][@"position"][@"width"]doubleValue];
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            double height = [[result content][@"face"][i][@"position"][@"height"]doubleValue];
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            //获取到得人脸范围
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            CGRect rect = CGRectMake(([[result content][@"face"][i][@"position"][@"center"][@"x"]doubleValue]-width/2)*image_width, ([[result content][@"face"][i][@"position"][@"center"][@"y"]doubleValue]-height/2)*image_height, width*image_width, height*image_height);
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}
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}
9）管理Person列表
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personNames = [NSArray arrayWithObjects:@"One", @"Two", @"Three", nil];
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for (int i = 0; i<[personNames count]; i++) {
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//根据personName删除对应一组Person
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[[FaceppAPI person]deleteWithPersonName:[personNames objectAtIndex:i] orPersonId:nil];
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//根据personName创建一个Person
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[[FaceppAPI person]createWithPersonName:[personNames objectAtIndex:i] andFaceId:[NSArray arrayWithObject:face_id] andTag:nil andGroupId:nil orGroupName:nil];}
10）管理Faceset列表
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//创建一个faceset
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    facesetName = @"sample_faceset";
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    [[FaceppAPI faceset]deleteWithFacesetName:facesetName orFacesetId:nil];
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    FaceppResult *createResult = [[FaceppAPI faceset]createWithFacesetName:facesetName andFaceId:faceIds andTag:nil];
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    if ([createResult success]) {
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        self.textView.text = [NSString stringWithFormat:@"成功在faceSet中添加%@个face，faceSetName:%@",[createResult content][@"added_face"],[createResult content][@"faceset_name"]];
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    }
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    /*
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     在一个faceset内进行search之前，必须先对该faceset进行Train
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     当Faceset中的信息被修改之后（增加，删除了Face等），为了保证结果与最新数据一致，Faceset应当被重新train. /train/search
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     */
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    [[FaceppAPI train]trainSynchronouslyWithId:nil orName:facesetName andType:FaceppTrainSearch refreshDuration:1.0f timeout:10.0f];
11）在Faceset里搜索最相似的face
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/*
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     在faceset里搜索最相似的face
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     faceset_id或faceset_name
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     */
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    FaceppResult *searchResult = [[FaceppAPI recognition]searchWithKeyFaceId:face_id andFacesetId:nil orFacesetName:facesetName];
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    NSMutableArray *similarityArray = [NSMutableArray array];
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    if ([searchResult success]) {
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        for (int i=0; i<3; i++) {
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            NSString *similarity = [searchResult content][@"candidate"][i][@"similarity"];
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            [similarityArray addObject:similarity];
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            self.textView.text = [NSString stringWithFormat:@"与faceSet中三张图片的相似度分别为%@",similarityArray];
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        }}