//
// ViewController.m
// 人脸识别
//
// Created by yangxiuying on 15/2/15.
// Copyright (c) 2015年 lanjiying. All rights reserved.
//
#import "ViewController.h"
#define SCREENWIDTH [UIScreen mainScreen].bounds.size.width
#define SCREENHEIGHT [UIScreen mainScreen].bounds.size.height
@interface ViewController ()
{
//原来的图像
UIImageView * _originleImagView;
//识别出来的图像
UIImageView * newfaceImageView;
}
@property(nonatomic,assign)NSInteger featureCount;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
_featureCount = 0;
UIImage * oldFaceImg = [UIImage imageNamed:@"faces1"];
_originleImagView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 20, oldFaceImg.size.width, oldFaceImg.size.height)];
[_originleImagView setImage:oldFaceImg];
_originleImagView.center = CGPointMake(SCREENWIDTH/2, oldFaceImg.size
.height/2+30);
[self.view addSubview:_originleImagView];
UIButton * featureButton = [UIButton buttonWithType:UIButtonTypeCustom];
featureButton.frame = CGRectMake(0, 0, 120, 50);
featureButton.center = CGPointMake(SCREENWIDTH/2, oldFaceImg.size.height + 30 + 30);
[featureButton setTitle:[NSString stringWithFormat:@"识别人脸%ld次",(long)_featureCount] forState:UIControlStateNormal];
[featureButton setTitle:@"识别的图像为" forState:UIControlStateSelected];
featureButton.backgroundColor = [UIColor grayColor];
[featureButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[featureButton setTitleColor:[UIColor whiteColor] forState:UIControlStateSelected];
[featureButton addTarget:self action:@selector(faceFetureButtonAction:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:featureButton];
newfaceImageView = [[UIImageView alloc] initWithFrame:CGRectMake(SCREENWIDTH/2, oldFaceImg.size.height + 30+ 60 , 50, 50)];
[self.view addSubview:newfaceImageView];
}
-(void)faceFetureButtonAction:(UIButton *)button
{
//核心代码进行人脸识别
CIContext * context = [CIContext contextWithOptions:nil];
UIImage * imageInput = [_originleImagView image];
CIImage * imageChange = [CIImage imageWithCGImage:imageInput.CGImage];
// 设置识别的参数
NSDictionary * param = [NSDictionary dictionaryWithObject:CIDetectorAccuracyHigh forKey:CIDetectorAccuracy];
//声明CIDetector
CIDetector * faceDetector = [CIDetector detectorOfType:CIDetectorTypeFace context:context options:param];
//取得识别结果
NSArray * detectResult = [faceDetector featuresInImage:imageChange];
UIView * resultView = [[UIView alloc] initWithFrame:_originleImagView.frame];
[self.view addSubview:resultView];
for (CIFaceFeature * faceFeature in detectResult) {
//脸部
UIView * faceView = [[UIView alloc] initWithFrame:faceFeature.bounds];
faceView.layer.borderWidth = 1;
faceView.layer.borderColor = [UIColor orangeColor].CGColor;
[resultView addSubview:faceView];
//左眼
if (faceFeature.hasLeftEyePosition) {
UIView * leftEyeView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 5)];
[leftEyeView setCenter:faceFeature.leftEyePosition];
leftEyeView.layer.borderWidth = 1;
leftEyeView.layer.borderColor = [UIColor orangeColor].CGColor;
[resultView addSubview:leftEyeView];
}
//右眼
if (faceFeature.hasRightEyePosition) {
UIView * rightEyeView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 5)];
[rightEyeView setCenter:faceFeature.rightEyePosition];
rightEyeView.layer.borderColor = [UIColor orangeColor].CGColor;
rightEyeView.layer.borderWidth = 1;
[resultView addSubview:rightEyeView];
}
//嘴巴
if (faceFeature.hasMouthPosition) {
UIView * mouthView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, 5)];
[mouthView setCenter:faceFeature.rightEyePosition];
mouthView.layer.borderColor = [UIColor orangeColor].CGColor;
mouthView.layer.borderWidth = 1;
[resultView addSubview:mouthView];
}
[resultView setTransform:CGAffineTransformMakeScale(1, -1)];
if ([detectResult count] > 0) {
{
CIImage * faceImage = [imageChange imageByCroppingToRect:[[detectResult objectAtIndex:0] bounds]];
UIImage * face = [UIImage imageWithCGImage:[context createCGImage:faceImage fromRect:faceImage.extent]];
newfaceImageView.image = face;
newfaceImageView.frame = CGRectMake(SCREENWIDTH/2-40, 300+ 30+ 60 ,80 , 80);
_featureCount +=1;
[button setTitle:[NSString stringWithFormat:@"识别次数%ld次",(long)_featureCount] forState:UIControlStateNormal];
}
}
}
}
运行效果如下：
原文地址：http://blog.csdn.net/u010670117/article/details/44056005
