OpenCV安装在xcode中 [英] OpenCV install in xcode

问题描述

我在我的项目中使用bellow链接安装opencv但我们如何在终端生成命令我不知道有人可以帮助我吗？
http://aptogo.co.uk/2011/ 09 / opencv-framework-for-ios /

I use bellow link for install opencv in my project but how we generate command in terminal I don`t know can anybody help me?? http://aptogo.co.uk/2011/09/opencv-framework-for-ios/

推荐答案

如果你想在iOS上使用OpenCV你应该去使用OpenCV提供的官方框架（从版本2.4.2开始）。

If you want to use OpenCV on iOS you should go with the official framework provided by OpenCV (as of version 2.4.2).

在此获取最新版本： OpenCV for iOS ，将其放入项目并将其包含在项目前缀中：

Get the lastest version here: OpenCV for iOS, drop it into your project and include this into your project prefixes:

ExampleApp-Prefix.pch：

#ifdef __cplusplus
    #import <opencv2/opencv.hpp>
#endif

你还必须将UIImage转换为cv： ：使用它与OpenCV一起使用。

You'll also have to "convert" an UIImage to a cv::Mat to use it with OpenCV.

UIImageCVMatConverter.h：

//
//  UIImageCVMatConverter.h
//

#import <Foundation/Foundation.h>

@interface UIImageCVMatConverter : NSObject {

}

+ (UIImage *)UIImageFromCVMat:(cv::Mat)cvMat;
+ (UIImage *)UIImageFromCVMat:(cv::Mat)cvMat withUIImage:(UIImage*)image;
+ (cv::Mat)cvMatFromUIImage:(UIImage *)image;
+ (cv::Mat)cvMatGrayFromUIImage:(UIImage *)image;
+ (UIImage *)scaleAndRotateImageFrontCamera:(UIImage *)image;
+ (UIImage *)scaleAndRotateImageBackCamera:(UIImage *)image;

@end

UIImageCVMatConverter.mm：

//
//  UIImageCVMatConverter.mm
//

#import "UIImageCVMatConverter.h"

@implementation UIImageCVMatConverter

+ (UIImage *)UIImageFromCVMat:(cv::Mat)cvMat withUIImage:(UIImage*)image;
{
  CGColorSpaceRef colorSpace = CGImageGetColorSpace( image.CGImage );
    CGFloat cols = image.size.width;
    CGFloat rows = image.size.height;
    CGFloat widthStep = image.size.width;
    CGContextRef contextRef = CGBitmapContextCreate( NULL, cols, rows, 8, widthStep*4, colorSpace, kCGImageAlphaNoneSkipLast | kCGBitmapByteOrderDefault );
    CGContextDrawImage( contextRef, CGRectMake(0, 0, cols, rows), image.CGImage );
    CGContextSetRGBStrokeColor( contextRef, 1, 0, 0, 1 );
    CGImageRef cgImage = CGBitmapContextCreateImage( contextRef );
    UIImage* result = [UIImage imageWithCGImage:cgImage];
    CGImageRelease( cgImage );
    CGContextRelease( contextRef );
    CGColorSpaceRelease( colorSpace );
    return result;
}

+(UIImage *)UIImageFromCVMat:(cv::Mat)cvMat
{
    NSData *data = [NSData dataWithBytes:cvMat.data length:cvMat.elemSize()*cvMat.total()];
    CGColorSpaceRef colorSpace;
    if ( cvMat.elemSize() == 1 ) {
        colorSpace = CGColorSpaceCreateDeviceGray();
    }
    else {
        colorSpace = CGColorSpaceCreateDeviceRGB();
    }
    CGDataProviderRef provider = CGDataProviderCreateWithCFData( (__bridge CFDataRef)data );
    CGImageRef imageRef = CGImageCreate( cvMat.cols, cvMat.rows, 8, 8 * cvMat.elemSize(), cvMat.step[0], colorSpace, kCGImageAlphaNone|kCGBitmapByteOrderDefault, provider, NULL, false, kCGRenderingIntentDefault );
    UIImage *finalImage = [UIImage imageWithCGImage:imageRef];
    CGImageRelease( imageRef );
    CGDataProviderRelease( provider );
    CGColorSpaceRelease( colorSpace );
    return finalImage;
}

+ (cv::Mat)cvMatFromUIImage:(UIImage *)image
{
    CGColorSpaceRef colorSpace = CGImageGetColorSpace( image.CGImage );
    CGFloat cols = image.size.width;
    CGFloat rows = image.size.height;
    cv::Mat cvMat( rows, cols, CV_8UC4 );
    CGContextRef contextRef = CGBitmapContextCreate( cvMat.data, cols, rows, 8, cvMat.step[0], colorSpace, kCGImageAlphaNoneSkipLast | kCGBitmapByteOrderDefault );
    CGContextDrawImage( contextRef, CGRectMake(0, 0, cols, rows), image.CGImage );
    CGContextRelease( contextRef );
    CGColorSpaceRelease( colorSpace );
    return cvMat;
}

+ (cv::Mat)cvMatGrayFromUIImage:(UIImage *)image
{
  cv::Mat cvMat = [UIImageCVMatConverter cvMatFromUIImage:image];
  cv::Mat grayMat;
    if ( cvMat.channels() == 1 ) {
        grayMat = cvMat;
  }
    else {
        grayMat = cv :: Mat( cvMat.rows,cvMat.cols, CV_8UC1 );
        cv::cvtColor( cvMat, grayMat, CV_BGR2GRAY );
    }
  return grayMat;
}

+ (UIImage *)scaleAndRotateImageBackCamera:(UIImage *)image
{
  static int kMaxResolution = 640;
  CGImageRef imgRef = image.CGImage;
  CGFloat width = CGImageGetWidth( imgRef );
  CGFloat height = CGImageGetHeight( imgRef );
  CGAffineTransform transform = CGAffineTransformIdentity;
  CGRect bounds = CGRectMake( 0, 0, width, height );
  if ( width > kMaxResolution || height > kMaxResolution ) {
    CGFloat ratio = width/height;
    if ( ratio > 1 ) {
      bounds.size.width = kMaxResolution;
      bounds.size.height = bounds.size.width / ratio;
    }
        else {
      bounds.size.height = kMaxResolution;
      bounds.size.width = bounds.size.height * ratio;
    }
  }
  CGFloat scaleRatio = bounds.size.width / width;
  CGSize imageSize = CGSizeMake( CGImageGetWidth(imgRef), CGImageGetHeight(imgRef) );
  CGFloat boundHeight;
  UIImageOrientation orient = image.imageOrientation;
  switch( orient ) {
    case UIImageOrientationUp:
      transform = CGAffineTransformIdentity;
      break;
    case UIImageOrientationUpMirrored:
      transform = CGAffineTransformMakeTranslation(imageSize.width, 0.0);
      transform = CGAffineTransformScale(transform, -1.0, 1.0);
      break;
    case UIImageOrientationDown:
      transform = CGAffineTransformMakeTranslation(imageSize.width, imageSize.height);
      transform = CGAffineTransformRotate(transform, M_PI);
      break;
    case UIImageOrientationDownMirrored:
      transform = CGAffineTransformMakeTranslation(0.0, imageSize.height);
      transform = CGAffineTransformScale(transform, 1.0, -1.0);
      break;
    case UIImageOrientationLeftMirrored:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeTranslation(imageSize.height, imageSize.width);
      transform = CGAffineTransformScale(transform, -1.0, 1.0);
      transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
      break;
    case UIImageOrientationLeft:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeTranslation(0.0, imageSize.width);
      transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
      break;
    case UIImageOrientationRightMirrored:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeScale(-1.0, 1.0);
      transform = CGAffineTransformRotate(transform, M_PI / 2.0);
      break;
    case UIImageOrientationRight:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeTranslation(imageSize.height, 0.0);
      transform = CGAffineTransformRotate(transform, M_PI / 2.0);
      break;
    default:
      [NSException raise:NSInternalInconsistencyException format:@"Invalid image orientation"];
  }
  UIGraphicsBeginImageContext( bounds.size );
  CGContextRef context = UIGraphicsGetCurrentContext();
  if ( orient == UIImageOrientationRight || orient == UIImageOrientationLeft ) {
    CGContextScaleCTM( context, -scaleRatio, scaleRatio );
    CGContextTranslateCTM( context, -height, 0 );
  }
    else {
    CGContextScaleCTM( context, scaleRatio, -scaleRatio );
    CGContextTranslateCTM( context, 0, -height );
  }
  CGContextConcatCTM( context, transform );
  CGContextDrawImage( UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imgRef );
  UIImage *returnImage = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return returnImage;
}

+ (UIImage *)scaleAndRotateImageFrontCamera:(UIImage *)image
{
  static int kMaxResolution = 640;
  CGImageRef imgRef = image.CGImage;
  CGFloat width = CGImageGetWidth(imgRef);
  CGFloat height = CGImageGetHeight(imgRef);
  CGAffineTransform transform = CGAffineTransformIdentity;
  CGRect bounds = CGRectMake( 0, 0, width, height);
  if (width > kMaxResolution || height > kMaxResolution) {
    CGFloat ratio = width/height;
    if (ratio > 1) {
      bounds.size.width = kMaxResolution;
      bounds.size.height = bounds.size.width / ratio;
    } else {
      bounds.size.height = kMaxResolution;
      bounds.size.width = bounds.size.height * ratio;
    }
  }

  CGFloat scaleRatio = bounds.size.width / width;
  CGSize imageSize = CGSizeMake(CGImageGetWidth(imgRef), CGImageGetHeight(imgRef));
  CGFloat boundHeight;
  UIImageOrientation orient = image.imageOrientation;
  switch(orient) {
    case UIImageOrientationUp:
      transform = CGAffineTransformIdentity;
      break;
    case UIImageOrientationUpMirrored:
      transform = CGAffineTransformMakeTranslation(imageSize.width, 0.0);
      transform = CGAffineTransformScale(transform, -1.0, 1.0);
      break;
    case UIImageOrientationDown:
      transform = CGAffineTransformMakeTranslation(imageSize.width, imageSize.height);
      transform = CGAffineTransformRotate(transform, M_PI);
      break;
    case UIImageOrientationDownMirrored:
      transform = CGAffineTransformMakeTranslation(0.0, imageSize.height);
      transform = CGAffineTransformScale(transform, 1.0, -1.0);
      break;
    case UIImageOrientationLeftMirrored:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeTranslation(imageSize.height, imageSize.width);
      transform = CGAffineTransformScale(transform, -1.0, 1.0);
      transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
      break;
    case UIImageOrientationLeft:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeTranslation(0.0, imageSize.width);
      transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
      break;
        case UIImageOrientationRight:
    case UIImageOrientationRightMirrored:
      boundHeight = bounds.size.height;
      bounds.size.height = bounds.size.width;
      bounds.size.width = boundHeight;
      transform = CGAffineTransformMakeScale(-1.0, 1.0);
      transform = CGAffineTransformRotate(transform, M_PI / 2.0);
      break;
        default:
      [NSException raise:NSInternalInconsistencyException format:@"Invalid image orientation"];
  }
  UIGraphicsBeginImageContext( bounds.size );
  CGContextRef context = UIGraphicsGetCurrentContext();
  if ( orient == UIImageOrientationRight || orient == UIImageOrientationLeft ) {
    CGContextScaleCTM(context, -scaleRatio, scaleRatio);
    CGContextTranslateCTM(context, -height, 0);
  }
    else {
    CGContextScaleCTM(context, scaleRatio, -scaleRatio);
    CGContextTranslateCTM(context, 0, -height);
  }
  CGContextConcatCTM( context, transform );
  CGContextDrawImage( UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imgRef );
  UIImage *returnImage = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return returnImage;
}

@end

重命名视图控制器实现文件到* .mm

Rename your view controller implementation file to *.mm

MyViewController.m -> MyViewController.mm

并在视图控制器中导入 UIImageCVMatConverter ：

And import the UIImageCVMatConverter in your view controller:

#import "UIImageCVMatConverter.h"

现在，您可以在视图控制器中混合使用Objective-C和C ++ OpenCV代码：

Now you can mix Objective-C and C++ OpenCV code inside your view controller:

cv::Mat img = [UIImageCVMatConverter cvMatFromUIImage:[UIImage imageNamed:@"my_image.png"]];
...

玩得开心！

这篇关于OpenCV安装在xcode中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！