ios--OpenCV--基于模板图片的标记识别

最新推荐文章于 2022-11-24 20:34:21 发布

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最新推荐文章于 2022-11-24 20:34:21 发布

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分类专栏：图像处理OpenCV ios开发文章标签： ios opencv

本文链接：https://blog.youkuaiyun.com/wanggsx918/article/details/23773729

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博客展示了相关效果图，涉及iOS和OpenCV技术，转载需注明来源http://blog.youkuaiyun.com/wanggsx918/article/details/23773729 。

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转载请注明来源：http://blog.youkuaiyun.com/wanggsx918/article/details/23773729

效果图如下：

#import "UIImage+OpenCV.h"

#import "MyViewController.h"
#import <opencv2/highgui/ios.h>
#import <opencv2/imgproc/imgproc_c.h>
#import <opencv2/core/core_c.h>
#import <opencv2/features2d/features2d.hpp>
#import <opencv2/nonfree/features2d.hpp>

// Aperture value to use for the Canny edge detection
const int kCannyAperture = 7;

@interface MyViewController ()
- (void)processFrame;
@end

@implementation MyViewController

@synthesize imageView = _imageView;
@synthesize imageView1 = _imageView1;

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    //[self TakeColorFromImageHSV];
    UIImage *mImage =  [UIImage imageNamed:@"防伪标签007.jpg"];
    IplImage *srcIpl = [self convertToIplImage:mImage];
    IplImage *dscIpl = cvCreateImage(cvGetSize(srcIpl), srcIpl->depth, 1);
    [self SkinDetect:srcIpl withParam:dscIpl];
    IplImage *dscIplNew = cvCreateImage(cvGetSize(srcIpl),  IPL_DEPTH_8U, 3);
    cvCvtColor(dscIpl, dscIplNew, CV_GRAY2BGR);
    self.imageView.image = mImage;
    
    
    UIImage *mImage1 =  [UIImage imageNamed:@"temple005.jpg"];
    self.imageView1.image = mImage1;
    IplImage *srcIpl1 = [self convertToIplImage:mImage1];
    IplImage *dscIpl1 = cvCreateImage(cvGetSize(srcIpl1), srcIpl1 ->depth, 1);
    [self SkinDetect:srcIpl1 withParam:dscIpl1];
    IplImage *dscIplNew1 = cvCreateImage(cvGetSize(srcIpl1), IPL_DEPTH_8U, 3);
    cvCvtColor(dscIpl1, dscIplNew1, CV_GRAY2BGR);
    
    IplImage *src = srcIpl;
    IplImage *srcResult = srcIpl;  //用来显示
    IplImage *templat = srcIpl1;
    IplImage *result;
    int srcW, srcH, templatW, templatH, resultH, resultW;
    srcW = src->width;
    srcH = src->height;
    templatW = templat->width;
    templatH = templat->height;
    resultW = srcW - templatW + 1;
    resultH = srcH - templatH + 1;
    result = cvCreateImage(cvSize(resultW, resultH), 32, 1);
    cvMatchTemplate(src, templat, result, CV_TM_SQDIFF);
    double minValue, maxValue;
    CvPoint minLoc, maxLoc;
    cvMinMaxLoc(result, &minValue, &maxValue, &minLoc, &maxLoc);
    cvRectangle(srcResult, minLoc, cvPoint(minLoc.x + templatW, minLoc.y+ templatH), cvScalar(0,0,255));

   
    self.imageView1.image = [self convertToUIImage:srcResult];
    
}



/// UIImage类型转换为IPlImage类型
-(IplImage*)convertToIplImage:(UIImage*)image
{
    CGImageRef imageRef = image.CGImage;
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    IplImage *iplImage = cvCreateImage(cvSize(image.size.width, image.size.height), IPL_DEPTH_8U, 4);
    CGContextRef contextRef = CGBitmapContextCreate(iplImage->imageData, iplImage->width, iplImage->height, iplImage->depth, iplImage->widthStep, colorSpace, kCGImageAlphaPremultipliedLast|kCGBitmapByteOrderDefault);
    CGContextDrawImage(contextRef, CGRectMake(0, 0, image.size.width, image.size.height), imageRef);
    CGContextRelease(contextRef);
    CGColorSpaceRelease(colorSpace);
    IplImage *ret = cvCreateImage(cvGetSize(iplImage), IPL_DEPTH_8U, 3);
    cvCvtColor(iplImage, ret, CV_RGB2BGR);
    cvReleaseImage(&iplImage);
    return ret;
}

/// IplImage类型转换为UIImage类型
-(UIImage*)convertToUIImage:(IplImage*)image
{
    cvCvtColor(image, image, CV_BGR2RGB);
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    NSData *data = [NSData dataWithBytes:image->imageData length:image->imageSize];
    CGDataProviderRef provider = CGDataProviderCreateWithCFData((CFDataRef)data);
    CGImageRef imageRef = CGImageCreate(image->width, image->height, image->depth, image->depth * image->nChannels, image->widthStep, colorSpace, kCGImageAlphaNone | kCGBitmapByteOrderDefault, provider, NULL, false, kCGRenderingIntentDefault);
    UIImage *ret = [UIImage imageWithCGImage:imageRef];
    CGImageRelease(imageRef);
    CGDataProviderRelease(provider);
    CGColorSpaceRelease(colorSpace);
    return ret;
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    self.imageView = nil;
    self.imageView1=nil;
    
    delete _videoCapture;
    _videoCapture = nil;
}


@end