效果图
前言:
工作需要接入虹软人脸识别,刚开始接入时候真的有点头大,官网下载的demo都跑不通,文档写的也不是特别完善,遇到的问题也没有地方可以借鉴.
因为是OC语言的SDK,所以选择先用OC接入.功能实现之后再迁移成Swift语言.做个记录以作各位参考.也可以让我回头复习.
实现功能:
开启前置摄像头获取稳定人脸信息后截图并跳转至另一控制器
实现步骤:
1.在官方注册账号,注册App,并下载SDK拖入项目.
2.在.info文件中添加权限提示字段,
3.加入必需框架
4.将一个文件的后缀名改为.mm
5.激活引擎
6.使用AVFondation框架,实现CameraController,开启前置摄像头,并创建数据回调delegate
7.新建VideoCheckViewController,实现页面.
8.添加陀螺仪判断,以保证照片清晰度
9.在delegate回调中实现主要功能.
1.在官方注册账号,注册App,并下载SDK拖入项目.
注册App很重要,因为注册app需要账号的企业认证,所以官方的和我的demo里都不自带appID和SDKKey,需要填入自己公司申请的appID.
2.在.info文件中添加权限提示字段
!!!谨记,如果没添加权限提示,激活引擎时会返回错误: 94217未知错误
<key>NSCameraUsageDescription</key>
<string>App需要您的相机权限</string>
3.加入必需框架
添加框架
ArcSoftFaceEngine框架是虹软主体SDK,
libstdc++.6.0.9.tdb是它必需框架.
CoreMotion是开启陀螺仪传感器,不需要可以不加
4.将一个文件的后缀名改为.mm
由于虹软SDK采用了Objective-C++实现，需要保证工程中至少有一个.mm 后缀的源文件(可以将任意一个.m后缀的文件改名为.mm)
5.激活引擎
填入appid和sdkkey
-(void)engineActive:(UIButton*)sender {
/// 虹软官网注册的appid
NSString *appid = @"";
NSString *sdkkey = @"";
ArcSoftFaceEngine *engine = [[ArcSoftFaceEngine alloc] init];
MRESULT mr = [engine activeWithAppId:appid SDKKey:sdkkey];
if (mr == ASF_MOK) {
UIAlertController* alertController = [UIAlertController alertControllerWithTitle:@"SDK激活成功" message:@"" preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alertController animated:YES completion:nil];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
}]];
} else if(mr == MERR_ASF_ALREADY_ACTIVATED){
UIAlertController* alertController = [UIAlertController alertControllerWithTitle:@"SDK已激活" message:@"" preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alertController animated:YES completion:nil];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
}]];
} else {
NSString *result = [NSString stringWithFormat:@"SDK激活失败：%ld", mr];
UIAlertController* alertController = [UIAlertController alertControllerWithTitle:result message:@"" preferredStyle:UIAlertControllerStyleAlert];
[self presentViewController:alertController animated:YES completion:nil];
[alertController addAction:[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
}]];
}
}
6.使用AVFondation框架,实现CameraController,开启前置摄像头,并创建数据回调delegate
#import "ASFCameraController.h"
#import <AVFoundation/AVFoundation.h>
@interface ASFCameraController ()<AVCaptureVideoDataOutputSampleBufferDelegate>
{
/// AVCaptureSession是AVFoundation的核心类,用于捕捉视频和音频,协调视频和音频的输入和输出流.
AVCaptureSession *captureSession;
/// 捕捉连接——AVCaptureConnection,捕捉连接负责将捕捉会话接收的媒体类型和输出连接起来
AVCaptureConnection *videoConnection;
}
@end
@implementation ASFCameraController
#pragma mark capture
/// 输出流回调,开启相机后实时调用
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection
{
if (connection == videoConnection) {
/// 使用protocol将其回调到VideoCheckViewController
if (self.delegate && [self.delegate respondsToSelector:@selector(captureOutput:didOutputSampleBuffer:fromConnection:)]) {
[self.delegate captureOutput:captureOutput didOutputSampleBuffer:sampleBuffer fromConnection:connection];
}
}
}
#pragma mark - Setup Video Session
/// 设置数据源摄像头
- (AVCaptureDevice *)videoDeviceWithPosition:(AVCaptureDevicePosition)position
{
NSArray *devices = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice *device in devices)
if ([device position] == position)
return device;
return nil;
}
- (BOOL) setupCaptureSession:(AVCaptureVideoOrientation)videoOrientation
{
captureSession = [[AVCaptureSession alloc] init];
/// beginConfiguration和commitConfiguration方法中的修改将在commit时同时提交
[captureSession beginConfiguration];
/// 设置摄像头为前置摄像头
AVCaptureDevice *videoDevice = [self videoDeviceWithPosition:AVCaptureDevicePositionFront];
AVCaptureDeviceInput *videoIn = [[AVCaptureDeviceInput alloc] initWithDevice:videoDevice error:nil];
if ([captureSession canAddInput:videoIn])
[captureSession addInput:videoIn];
/// 设置输出流
AVCaptureVideoDataOutput *videoOut = [[AVCaptureVideoDataOutput alloc] init];
[videoOut setAlwaysDiscardsLateVideoFrames:YES];
_previewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:captureSession];
_previewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
/// 指定像素格式
NSDictionary *dic = [NSDictionary dictionaryWithObject:[NSNumber numberWithInt:kCVPixelFormatType_420YpCbCr8BiPlanarFullRange] forKey:(id)kCVPixelBufferPixelFormatTypeKey];
[videoOut setVideoSettings:dic];
/// 开新线程进行输出流代理方法调用
dispatch_queue_t videoCaptureQueue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH,0);
[videoOut setSampleBufferDelegate:self queue:videoCaptureQueue];
/// 将输出流加入session
if ([captureSession canAddOutput:videoOut])
[captureSession addOutput:videoOut];
videoConnection = [videoOut connectionWithMediaType:AVMediaTypeVideo];
/// 设置镜像展示,不设置或赋值为false则获取图片是延垂直线相反
if (videoConnection.supportsVideoMirroring) {
[videoConnection setVideoMirrored:true];
}
/// 设置摄像头位置
if ([videoConnection isVideoOrientationSupported]) {
[videoConnection setVideoOrientation:videoOrientation];
}
/// 输出像素
if ([captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720]) {
[captureSession setSessionPreset:AVCaptureSessionPreset1280x720];
}
[captureSession commitConfiguration];
return YES;
}
- (void) startCaptureSession
{
if ( !captureSession )
return;
if (!captureSession.isRunning )
[captureSession startRunning];
}
- (void) stopCaptureSession
{
[captureSession stopRunning];
}
@end
7.新建VideoCheckViewController,实现页面.
/// 人脸识别页面控制器
@interface VideoCheckViewController ()<ASFCameraControllerDelegate,ASFVideoProcessorDelegate>{
/// 根据takePhoto状态来决定拍照
BOOL takePhoto;
/// 拍照后结果展示圆形ImageView
UIImageView *showImageView;
/// 拍照后背景半透明View
UIView *imageBackView;
/// 扫描框ImageView
UIImageView *scanningImageView;
}
/// 获取前摄像头影像
@property (nonatomic, strong) ASFCameraController* cameraController;
/// 虹软进行人脸识别分析的工具
@property (nonatomic, strong) ASFVideoProcessor* videoProcessor;
/// 装载所有人脸信息框的Array
@property (nonatomic, strong) NSMutableArray* arrayAllFaceRectView;
@end
@implementation VideoCheckViewController
- (void)viewDidLoad {
[super viewDidLoad];
[self getManager];
takePhoto = true;
/// 将设备方向赋给cameraController
UIInterfaceOrientation uiOrientation = [[UIApplication sharedApplication] statusBarOrientation];
AVCaptureVideoOrientation videoOrientation = (AVCaptureVideoOrientation)uiOrientation;
/// 预存Array内存
self.arrayAllFaceRectView = [NSMutableArray arrayWithCapacity:0];
/// 虹软的人脸识别控制器
self.videoProcessor = [[ASFVideoProcessor alloc] init];
self.videoProcessor.delegate = self;
[self.videoProcessor initProcessor];
/// 开启前置摄像
self.cameraController = [[ASFCameraController alloc]init];
self.cameraController.delegate = self;
[self.cameraController setupCaptureSession:videoOrientation];
/// 将摄影机layer置于控制器前
[self.view.layer addSublayer:self.cameraController.previewLayer];
self.cameraController.previewLayer.frame = self.view.layer.frame;
/// 扫描框ImageView
scanningImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"scanning"]];
scanningImageView.frame = CGRectMake((UIScreen.mainScreen.bounds.size.width - 230)/2, 231, 230, 230);
[self.view addSubview:scanningImageView];
/// 拍照后背景半透明颜色
imageBackView = [[UIView alloc] initWithFrame:UIScreen.mainScreen.bounds];
imageBackView.backgroundColor = [UIColor.blackColor colorWithAlphaComponent:0.7];
imageBackView.hidden = true;
[self.view addSubview:imageBackView];
/// 拍照后预览图
showImageView = [[UIImageView alloc] initWithFrame: CGRectMake((UIScreen.mainScreen.bounds.size.width - 230)/2, 231, 230, 230)];
showImageView.layer.cornerRadius = 115;
showImageView.layer.masksToBounds = YES;
showImageView.contentMode = UIViewContentModeCenter;
[imageBackView addSubview:showImageView];
/// 预览相片旁边的波纹动画
RippleAnimationView *viewA = [[RippleAnimationView alloc] initWithFrame:CGRectMake(0, 0, showImageView.frame.size.width, showImageView.frame.size.height) animationType:AnimationTypeWithBackground];
viewA.center = showImageView.center;
[imageBackView addSubview:viewA];
[imageBackView bringSubviewToFront:showImageView];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
/// 开始前摄像头画面捕捉
[self.cameraController startCaptureSession];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
/// 停止前摄像头画面捕捉
[self.cameraController stopCaptureSession];
}
@end
8.添加陀螺仪判断,以保证照片清晰度
/**
开启陀螺仪,判断陀螺仪状态保证手机不在太过晃动情况下拍照,保证照片质量
*/
- (void) getManager {
//初始化全局管理对象
CMMotionManager *manager = [[CMMotionManager alloc] init];
self.motionManager = manager;
if (manager.gyroAvailable) {
[manager startGyroUpdates];
}
}
9.在delegate回调中实现主要功能.
- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
/// 在获取相片状态下
if (takePhoto == true){
/// 获取数据传入虹软人面识别控制器
CVImageBufferRef cameraFrame = CMSampleBufferGetImageBuffer(sampleBuffer);
ASF_CAMERA_DATA* cameraData = [Utility getCameraDataFromSampleBuffer:sampleBuffer];
/// 获取画面中人脸信息
NSArray *arrayFaceInfo = [self.videoProcessor process:cameraData];
__weak __typeof__(self) weakself = self;
/// 主线程进行页面操作
dispatch_sync(dispatch_get_main_queue(), ^{
/// 获取人脸view数组是为了判断rect
if(weakself.arrayAllFaceRectView.count >= arrayFaceInfo.count)
{
/// 如果画面中人脸数量高于储存人脸View数量,则从数组中获取.
for (NSUInteger face=arrayFaceInfo.count; face<weakself.arrayAllFaceRectView.count; face++) {
UIView *faceRectView = [weakself.arrayAllFaceRectView objectAtIndex:face];
faceRectView.hidden = YES;
}
}
else
{
/// 否则新建view加入数组
for (NSUInteger face=weakself.arrayAllFaceRectView.count; face<arrayFaceInfo.count; face++) {
UIView *view = [[UIView alloc] init];
[weakself.view addSubview:view];
[weakself.arrayAllFaceRectView addObject:view];
}
}
for (NSUInteger face = 0; face < arrayFaceInfo.count; face++) {
UIView *faceRectView = [weakself.arrayAllFaceRectView objectAtIndex:face];
ASFVideoFaceInfo *faceInfo = [arrayFaceInfo objectAtIndex:face];
faceRectView.hidden = NO;
faceRectView.frame = [weakself dataFaceRect2ViewFaceRect:faceInfo.faceRect];
//// 判断face3DAngle,保证人脸正对摄像头
if(faceInfo.face3DAngle.status == 0) {
if (faceInfo.face3DAngle.rollAngle <= 10 && faceInfo.face3DAngle.rollAngle >= -10 && faceInfo.face3DAngle.yawAngle <= 10 && faceInfo.face3DAngle.yawAngle >= -10 && faceInfo.face3DAngle.pitchAngle <= 10 && faceInfo.face3DAngle.pitchAngle >= -10){
/// 判断人脸View.frame,保证人脸在扫描框中
if (CGRectContainsRect(CGRectMake(30, 150, (UIScreen.mainScreen.bounds.size.width - 60), (UIScreen.mainScreen.bounds.size.height - 300)), faceRectView.frame)){
/// 判断陀螺仪实时片钻加速度,保证手机在尽量平稳的状态
CMGyroData *newestAccel = self.motionManager.gyroData;
if (newestAccel.rotationRate.x < 0.000005 && newestAccel.rotationRate.y < 0.000005 && newestAccel.rotationRate.z < 0.000005 ){
/// 全部条件满足,则拍照.
self->takePhoto = false;
/// 将数据转换成UIImage
CIImage *ciImage = [[CIImage alloc] initWithCVPixelBuffer: cameraFrame];
CIContext *context = [[CIContext alloc] init];
CGRect imageRect= CGRectMake(0, 0, CVPixelBufferGetWidth(cameraFrame), CVPixelBufferGetHeight(cameraFrame));
struct CGImage *image = [context createCGImage:ciImage fromRect:imageRect];
UIImage *resultImage = [[UIImage alloc] initWithCGImage:image scale:UIScreen.mainScreen.scale orientation:UIImageOrientationUp];
/// 将预览View展示,把结果image加入预览ImageView
self->imageBackView.hidden = NO;
self->showImageView.image = resultImage;
/// 添加一个缩小动画,并在动画结束后跳转到新页面
[UIView animateWithDuration:1.3 animations:^{
self->showImageView.transform =CGAffineTransformMakeScale(0.7, 0.7);
} completion:^(BOOL finished) {
ImageShowViewController *vc = [[ImageShowViewController alloc] init];
vc.image = resultImage;
double delayInSeconds = 2.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
[weakself presentViewController:vc animated:false completion:nil];
});
}];
}
}
}
}
}
});
/// 释放内存!!! 重要!!!
[Utility freeCameraData:cameraData];
}
}
其他问题.
1.官方demo跑不通.
官方的demo有两个问题,首先是没有在target中ArcSoftFaceEngine,libstdc++.6.0.9.tdb框架,
其次是在激活引擎方法里没有填入appid和sdkkey,需要我们自己手动加入.
2.激活引擎错误94217未知错误.
这个是因为没有在info.plist文件中添加相机权限提示.
3.激活后调用相机app内存无限升高,直到崩溃
注意观察- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer fromConnection:(AVCaptureConnection *)connection {
}
方法中是不是有调用
[Utility freeCameraData:cameraData];
demo地址: EWArcSoftDemo
调用成功记得查看下内存使用情况,一定要将data及时释放,保证不产生内存泄漏.
接入的主要核心内容就是AVFoundation框架实现的摄像机,以及虹软自己框架对摄像机传回数据的处理.包括之前我自定制相机时也是用了AVFoundation框架,所以它真的很重要.需要深入学习.
有问题欢迎探讨.
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