OpenCV C ++代码到Obj-C ++

Question

我被建议用于为OCR准备图像的算法，给我的代码很棒！但是它似乎与OpenCV的iOS版本不兼容，有一些不同的命名约定，我很难将代码转换为Obj-C ++。 有人可以为Obj-C ++重写它吗？

以下是原始代码：

#include <iostream>
#include <vector>
#include <stdio.h>
#include <stdarg.h>
#include "opencv2/opencv.hpp"
#include "fstream"
#include "iostream"
using namespace std;
using namespace cv;

//-----------------------------------------------------------------------------------------------------
// 
//-----------------------------------------------------------------------------------------------------
void CalcBlockMeanVariance(Mat& Img,Mat& Res,float blockSide=21) // blockSide - the parameter (set greater for larger font on image)
{
    Mat I;
    Img.convertTo(I,CV_32FC1);
    Res=Mat::zeros(Img.rows/blockSide,Img.cols/blockSide,CV_32FC1);
    Mat inpaintmask;
    Mat patch;
    Mat smallImg;
    Scalar m,s;

    for(int i=0;i<Img.rows-blockSide;i+=blockSide)
    {       
        for (int j=0;j<Img.cols-blockSide;j+=blockSide)
        {
            patch=I(Range(i,i+blockSide+1),Range(j,j+blockSide+1));
            cv::meanStdDev(patch,m,s);
            if(s[0]>0.01) // Thresholding parameter (set smaller for lower contrast image)
            {
                Res.at<float>(i/blockSide,j/blockSide)=m[0];
            }else
            {
                Res.at<float>(i/blockSide,j/blockSide)=0;
            }           
        }
    }

    cv::resize(I,smallImg,Res.size());

    cv::threshold(Res,inpaintmask,0.02,1.0,cv::THRESH_BINARY);

    Mat inpainted;
    smallImg.convertTo(smallImg,CV_8UC1,255);

    inpaintmask.convertTo(inpaintmask,CV_8UC1);
    inpaint(smallImg, inpaintmask, inpainted, 5, INPAINT_TELEA);

    cv::resize(inpainted,Res,Img.size());
    Res.convertTo(Res,CV_32FC1,1.0/255.0);

}
//-----------------------------------------------------------------------------------------------------
// 
//-----------------------------------------------------------------------------------------------------
int main( int argc, char** argv )
{
    namedWindow("Img");
    namedWindow("Edges");
    //Mat Img=imread("D:\\ImagesForTest\\BookPage.JPG",0);
    Mat Img=imread("Test2.JPG",0);
    Mat res;
    Img.convertTo(Img,CV_32FC1,1.0/255.0);
    CalcBlockMeanVariance(Img,res); 
    res=1.0-res;
    res=Img+res;
    imshow("Img",Img);
    cv::threshold(res,res,0.85,1,cv::THRESH_BINARY);
    cv::resize(res,res,cv::Size(res.cols/2,res.rows/2));
    imwrite("result.jpg",res*255);
    imshow("Edges",res);
    waitKey(0);

    return 0;
}

我的尝试:(给出带有黑点的蓝色图像）

void CalcBlockMeanVariance(cv::Mat& Img,cv::Mat& Res,float blockSide=21) // blockSide - the parameter (set greater for larger font on image)
{
    cv::Mat I;
    Img.convertTo(I,CV_32FC1);
    Res=cv::Mat::zeros(Img.rows/blockSide,Img.cols/blockSide,CV_32FC1);
    cv::Mat inpaintmask;
    cv::Mat patch;
    cv::Mat smallImg;
    cv::Scalar m,s;

    for(int i=0;i<Img.rows-blockSide;i+=blockSide)
    {
        for (int j=0;j<Img.cols-blockSide;j+=blockSide)
        {
             patch=I(cv::Rect(j,i,blockSide,blockSide));
            cv::meanStdDev(patch,m,s);
            if(s[0]>0.01) // Thresholding parameter (set smaller for lower contrast image)
            {
                Res.at<float>(i/blockSide,j/blockSide)=m[0];
            }else
            {
                Res.at<float>(i/blockSide,j/blockSide)=0;
            }
        }
    }

    cv::resize(I,smallImg,Res.size());

    cv::threshold(Res,inpaintmask,0.02,1.0,CV_THRESH_BINARY);

    cv::Mat inpainted;
    smallImg.convertTo(smallImg,CV_8UC1,255);

    inpaintmask.convertTo(inpaintmask,CV_8UC1);
    inpaint(smallImg, inpaintmask, inpainted, 5, CV_INPAINT_TELEA);

    cv::resize(inpainted,Res,Img.size());
    Res.convertTo(Res,CV_32FC1,1.0/255.0);

}

调用方法。

_img = [self cvMatFromUIImage:_endImage];
cv::cvtColor(_img, _img, CV_RGB2GRAY);
_img.convertTo(_img, CV_32FC1, 1.0/255.0);
CalcBlockMeanVariance(_img, _res);
_res = 1.0 - _res;
_res = _img + _res;
cv::threshold(_res,_res,0.85,1,cv::THRESH_BINARY);
cv::resize(_res,_res,cv::Size(_res.cols/2,_res.rows/2));

_endImage = [self UIImageFromMat:_res];

Answer 1

您可以在另一个NSObject class中简单地分隔您的c ++代码，并从 OpenCVUtilities.m 将文件名重命名为 OpenCVUtilities.mm 。 mm 建议Objective -C应该为类使用C ++编译器，并且您不需要将代码转换为Objective-C，它将按原样运行。

执行此操作后，您需要更改项目中的一些设置 - ＆gt;构建设置，如下图所示

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干杯。