人脸识别+滤镜效果（基于GPUImage实现的自定义滤镜）
最近碰到一个好玩的需求。说要客户端这边判定一下是否有人脸。在有的基础上。对相片做进一步的美化滤镜处理。
- 首先是人脸的识别判定;
//将图片对象拿到，转化对应CIImage
CIImage* ciimage = [CIImage imageWithCGImage:_imageView.image.CGImage];
//配置人脸识别时候的属性值
NSDictionary* opts = [NSDictionary dictionaryWithObject:
CIDetectorAccuracyHigh forKey:CIDetectorAccuracy];
//配置识别者
CIDetector* detector = [CIDetector detectorOfType:CIDetectorTypeFace
context:nil options:opts];
//拿到识别到的特性
NSArray* features = [detector featuresInImage:ciimage];
if (features.count == 0)
{
_HUD = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
_HUD.mode = MBProgressHUDModeAnnularDeterminate;
_HUD.label.text = @"未识别到人脸！！请返回重试。";
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{
sleep(2.0);
dispatch_async(dispatch_get_main_queue(), ^{
[MBProgressHUD hideHUDForView:self.view animated:YES];
[self.navigationController popViewControllerAnimated:YES];
});
});
}
else
{
FiltersViewController *beautyVC = [[FiltersViewController alloc] initWithImage:self.image];
[self.navigationController pushViewController:beautyVC animated:YES];
}
- 滤镜的自定义和使用。
对于GPUImage的封装使用，我这里就不一一赘述。自己看demo一一对应吧。