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iOS人脸年龄|性别检测

2019-11-09 16:18:22

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原文地址：http://www.jianshu.com/p/4f2a14f9caac

*转载请标明来源,文章相关详细代码。本文主要介绍iOS使用习悦人脸服务实现简单的人脸年龄和性别检测。*

1. 创建应用，获取API Key和API Secret

首先进入习悦开发者平台,注册或登录成功后，点击创建应用，填写必要内容后创建应用，如图：创建新应用.png

创建应用后，在我的应用模块，选择对应应用点击管理应用，如图：应用管理.png

复制API Key和API Secret以备后用，如图：查看API_Key和API_Secret.png

2. 下载人脸识别SDK

将解压后的人脸识别SDK拖拽到项目中，如图勾选：添加人脸识别SDK.png

使用之前创建的API Key和API Secret进行认证,在application: didFinishLaunchingWithOptions:入口方法中添加以下代码：

[[ZHTJBaseService shared] setApiKey:@"2208eda555994ea8a20cdcd5d9cc3670" apiSecret:@"aaed815544547725d6bd9a6690ff13b76d20f020"];//认证成功后需要绑定用户，userID为自定义(1-32位字母/数字) [ZHTJFaceUserManagertj_creatUserWithUserID:@"UserID" completionHandler:^(NSString *userID, ZHTJFaceError *error) {}];选择图片进行年龄和性别检测，代码如下：-(IBAction)clickOneFaceDetection:(id)sender{ //清除掉覆盖层 [self removeCoverLayer]; [ZHTJDetectManagertj_DetectImage:self.mainImgV.imageisAge:_ageSwitch.onisGender:_genderSwitch.oncompletionHandler:^(NSArray<ZHTJFaceFeaturesModel *> *faceFeatureMDAry, ZHTJFaceError *error) {dispatch_async(dispatch_get_main_queue(), ^{ if (error.code) {NSLog(@"失败:%@",error.msg);}else{NSLog(@"faceNum==%d",(int)faceFeatureMDAry.count);NSArray * scaleAry = [self getScaleAndCcaleImgOriginWithImgView:self.mainImgV]; double scale = [scaleAry.firstObjectdoubleValue];CGPointscaleImgOrigin = [scaleAry.lastObjectCGPointValue]; [faceFeatureMDAryenumerateObjectsUsingBlock:^(ZHTJFaceFeaturesModel * _Nonnullobj, NSUIntegeridx, BOOL * _Nonnull stop) {ZHTJFaceFeaturesModel * model = (ZHTJFaceFeaturesModel*)obj;NSLog(@"%@-%@-%.3f-%@",model.faceID,NSStringFromCGRect(model.faceRect),model.faceAge,model.faceGender);NSMutableString * textMuStr = [[NSMutableStringalloc]init]; if (_ageSwitch.on) { [textMuStrappendString:[NSStringstringWithFormat:@"age:%.f/n",model.faceAge]]; } if (_genderSwitch.on) { [textMuStrappendString:[NSStringstringWithFormat:@"女:男=%.f:%.f",[model.faceGender.firstObjectdoubleValue]*100,[model.faceGender.lastObjectdoubleValue]*100]]; } //绘制人脸框及年龄和性别信息 [self drawTextLayerWithFaceRect:model.faceRecttext:textMuStrscale:scalescaleImgOrigin:scaleImgOriginonImgView:self.mainImgV]; }]; } }); }];}#PRagma mark 获得图片在imgV上的缩放比和img相对于imgV的左上角位置- (NSArray*)getScaleAndCcaleImgOriginWithImgView:(UIImageView *)imgV{ if (imgV.contentMode == UIViewContentModeScaleaspectFit) { //1.当imgV.contentMode = UIViewContentModeScaleAspectFit时,计算缩放后的imgSize和img在imgV的左上角位置 //计算缩放比例CGFloatimgV_W =imgV.bounds.size.width;CGFloatimgV_H =imgV.bounds.size.height;CGFloatimg_W = imgV.image.size.width;CGFloatimg_H = imgV.image.size.height; double scale = MIN(imgV_H / img_H, imgV_W / img_W);CGSizescaleImgSize = CGSizeMake(img_W*scale, img_H*scale);//缩放后的imgSizeCGPointscaleImgOrigin = CGPointMake((imgV_W-scaleImgSize.width)/2.f, (imgV_H-scaleImgSize.height)/2.f);//缩放后的img在imgV的左上角位置 return @[@(scale),[NSValuevalueWithCGPoint:scaleImgOrigin]]; } return nil;}- (void)drawTextLayerWithFaceRect:(CGRect)faceRect text:(NSString *)text scale:(double)scale scaleImgOrigin:(CGPoint)scaleImgOriginonImgView:(UIImageView *)imgV{ //2,根据缩放后的imgSize得到人脸相对于img的位置CGFloatfea_W = faceRect.size.width * scale;CGFloatfea_H = faceRect.size.height * scale; //3,根据缩放后的img在imgV的左上角位置得到人脸相对于imgV的位置CGFloatfea_X = faceRect.origin.x * scale + scaleImgOrigin.x;CGFloatfea_Y = faceRect.origin.y * scale + scaleImgOrigin.y;CGRectNowFaceRect = CGRectMake(fea_X, fea_Y, fea_W, fea_H); //得到人脸在imgV的位置CATextLayer * textLay = [CATextLayer layer];textLay.string = text;textLay.alignmentMode = @"center";//文字对齐方式 //字体 (仅限于非富文本才能用)UIFont *fontTemp = [UIFontfontWithName:@"Heiti SC" size:12];CFStringReffontName = (__bridge CFStringRef)fontTemp.fontName;textLay.font = CGFontCreateWithFontName(fontName);textLay.fontSize = fontTemp.pointSize;textLay.bounds = CGRectMake(0, 0, NowFaceRect.size.width, NowFaceRect.size.height);//文本大小,默认是0 //给图层加边框textLay.borderColor = [UIColor colorWithRed:1 green:0 blue:0 alpha:1].CGColor;textLay.borderWidth = 1; //字体颜色(仅限于非富文本才能用)textLay.foregroundColor = [UIColor colorWithRed:0 green:0 blue:1 alpha:1].CGColor;textLay.wrapped = YES;//是否折行,默认是notextLay.contentsScale = [UIScreenmainScreen].scale;//清晰度textLay.position = CGPointMake(NowFaceRect.size.width/2+NowFaceRect.origin.x, NowFaceRect.size.height/2+NowFaceRect.origin.y); [imgV.layeraddSublayer:textLay];textLay = nil;}#pragma mark 清除覆盖层- (void)removeCoverLayer{ //清除掉覆盖层NSMutableArray * muAry = [NSMutableArrayarrayWithArray:_mainImgV.layer.sublayers]; [muAryenumerateObjectsUsingBlock:^(CALayer * _Nonnullobj, NSUIntegeridx, BOOL * _Nonnull stop) { [objremoveFromSuperlayer]; }];}

检测效果如下图： -

*转载请标明来源,文章相关详细代码。本文主要介绍iOS使用习悦人脸服务实现简单的人脸年龄和性别检测。*

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