- 在OpenCV官网上下载OpenCV开发包，OpenCV for iOS
- 创建新项目并在Building phase中添加opencv2.framework
- 将.m文件后缀改为.mm，以支持C++代码
test：
#import "ViewController.h"
#import <opencv2/opencv.hpp>
#import <opencv2/imgproc/types_c.h>
#import <opencv2/highgui/ios.h>
@interface ViewController ()
{
cv::Mat cvImage;
}
@property (weak, nonatomic) IBOutlet UIImageView *imgView;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
CGRect rect = [UIScreen mainScreen].bounds;
self.imgView.frame = rect;
UIImage *image = [UIImage imageNamed:@"test.jpg"];
UIImageToMat(image, cvImage);
if(!cvImage.empty()){
cv::Mat gray;
// 将图像转换为灰度显示
cv::cvtColor(cvImage,gray,CV_RGB2GRAY);
// 应用高斯滤波器去除小的边缘
cv::GaussianBlur(gray, gray, cv::Size(5,5), 1.2,1.2);
// 计算与画布边缘
cv::Mat edges;
cv::Canny(gray, edges, 0, 50);
// 使用白色填充
cvImage.setTo(cv::Scalar::all(225));
// 修改边缘颜色
cvImage.setTo(cv::Scalar(0,128,255,255),edges);
// 将Mat转换为Xcode的UIImageView显示
self.imgView.image = MatToUIImage(cvImage);
}
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
run:
test.jpg
res_test.png
