OpenCV之相机黑白处理

Xcode的配置

导入头文件

#import <opencv2/videoio/cap_ios.h>

创建属性

@interface ViewController ()<CvVideoCameraDelegate>

@property (weak, nonatomic) IBOutlet UIImageView *imgV;
@property (nonatomic) CvVideoCamera *camera;
@property (nonatomic) BOOL  isColorCamera;

@end

创建相机

_isColorCamera = YES;

//创建相机并且设置载体
_camera = [[CvVideoCamera alloc] initWithParentView:self.imgV];

//设置摄像头的方向 （后置）
_camera.defaultAVCaptureDevicePosition = AVCaptureDevicePositionBack;

//设置相机回调处理
_camera.delegate = self;

开启相机

[_camera start];

彩色or黑白相机的选择

- (IBAction)caiseCamera:(id)sender {

_isColorCamera = YES;
}

- (IBAction)fuguCamera:(id)sender {

_isColorCamera = NO;
}

在CvVideoCameraDelegate回调中进行处理

- (void)processImage:(cv::Mat&)image{

//默认是彩色相机
if (!_isColorCamera) {
//复古
//1、彩色图片 -> 灰色图片
Mat mat_image_gray ;
cvtColor(image, mat_image_gray, COLOR_BGR2GRAY);

//2、显示图片
cvtColor(mat_image_gray, image, COLOR_GRAY2BGR);
}
}

效果展示如下：