ios--OpenCV--图像像素颜色反转

来源：互联网发布：搜狗大数据编辑：程序博客网时间：2024/05/22 18:24
- (void)viewDidLoad{    [super viewDidLoad];        UIImage *mImage =  [UIImage imageNamed:@"防伪标签001.jpg"];    self.imageView.image = mImage;        IplImage *image = [self convertToIplImage:mImage];    CvScalar cs;    for (int i=0; i< image->height; i++) {        for (int j=0; j < image->width; j++) {            cs = cvGet2D(image, i, j);            cs.val[0] = 255 - cs.val[0];            cs.val[1] = 255 - cs.val[1];            cs.val[2] = 255 - cs.val[2];           cvSet2D(image,i, j, cs);            printf("cs.val[0]=%f,val[1]=%f,val[2]=%f/n",cs.val[0],cs.val[1],cs.val[2]);        }    }        self.imageView1.image = [self convertToUIImage:image];}/// 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;}
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