试图了解Lineiterator的用法 [英] Trying to understand the usage of Lineiterator

问题描述

这篇文章后，我想了解如何使用lineiterator。我写了以下代码：

  #include< opencv2 / core / core.hpp> 
 #include< opencv2 / highgui / highgui.hpp> 
 #include< iostream> 
 
 using namespace cv; 
 using namespace std; 
 
 
 int main（）
 {
 
 Mat img = imread（C：\\Users\\Acme\\\ \\ Desktop\\image-processing\\2.bmp）; 
 
 
 LineIterator it（img，1，200，8）; 
 LineIterator it2 = it; 
 
 vector< Vec3b> buf（it.count）; 
 
 for（int i = 0; i  {
 buf [i] = *（const Vec3b）* it; 
 printf（％d\\\
，buf [i]）; 
 
} 
 
 return 0; 
 
} 
  

但它提供错误：

 错误1错误C2664：'cv :: LineIterator :: LineIterator（const cv :: Mat&，cv :: Point，cv :: Point，int ，bool）'：不能将参数2从'int'转换为'cv :: Point'c：\users\acme\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 15 
 
 
错误2错误C2100：illegal indirection c：\users\acme\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 22 
 
 
 3 IntelliSense：没有构造函数cv :: LineIterator :: LineIterator的实例匹配参数列表c：\users\acme\documents\visual studio 2010\\ \\projects\iterator\opencv1\helloworld.cpp 15 
 
 
 
 4智能感知：没有运算符*匹配这些操作数c：\users\acme\\ \\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 22 
  

我期望buf会打印我存储的值跨线。有人可以帮我理解如何纠正这个？

$

  LineIterator it（img，Point（1,1），Point（20， 20），8）; 
 
 vector< Vec3b> f 
 
 for（int i = 0; i  {
 buf.push_back（Vec3b（* it））; 
 it ++; 
} 
 
 cerr<< Mat（buf）< endl; 
  

Following this article I am trying to understand how to work with lineiterator. I wrote the following code:

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <iostream>

using namespace cv;
using namespace std;


int main( )
{

     Mat img = imread("C:\\Users\\Acme\\Desktop\\image-processing\\2.bmp");


LineIterator it(img, 1, 200, 8);
LineIterator it2 = it;

vector<Vec3b> buf(it.count);

for(int i = 0; i < it.count; i++, ++it)
{
    buf[i] = *(const Vec3b)*it;
printf("%d\n", buf[i]);

}

      return 0;

}

But It gives errors:

Error   1   error C2664: 'cv::LineIterator::LineIterator(const cv::Mat &,cv::Point,cv::Point,int,bool)' : cannot convert parameter 2 from 'int' to 'cv::Point'  c:\users\acme\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 15


Error   2   error C2100: illegal indirection    c:\users\acme\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 22


3   IntelliSense: no instance of constructor "cv::LineIterator::LineIterator" matches the argument list c:\users\acme\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 15



4   IntelliSense: no operator "*" matches these operands    c:\users\acme\documents\visual studio 2010\projects\iterator\opencv1\helloworld.cpp 22

I am expecting that buf would print me the values stored across the line. Can someone help me understand how to rectify this?

解决方案

LineIterator it(img, Point(1,1), Point(20,20), 8);

vector<Vec3b> buf;   

for(int i=0; i<it.count; i++)
{
    buf.push_back( Vec3b(*it) );
    it++;
}

cerr << Mat(buf) << endl;

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