Visual C ++ 6.0中的cvblob编译错误 [英] cvblob compile error in Visual C++ 6.0

问题描述

我使用Microsoft Visual C ++ 6.0和Microsoft Visual Studio 2008来开发学术计算机视觉项目。

在这个项目中，我需要使用OpenCV 1.1（http://opencv.willowgarage.com/）和CvBlob（http://code.google.com/p / cvblob /）。

我试图用Microsoft Visual Studio 2008编译这个项目，它编译没有错误。

使用Visual C ++ 6.0我有很多错误。

OpenCV不对此行为负责，因为只有OpenCV（没有CvBlob）的简单项目运行良好。

为了更好地理解错误，我做了一个只有CvBlob包含的空项目。

我在此粘贴错误的简要摘要：

  cvcontour .cpp（253）：error C2371：'i'：redefinition;不同的基本类型（和其他类似的，我解决与变量redefinition，每次）
 
 cvcontour.cpp（318）：错误C2664：'thiscall std :: vector< struct CvPoint，class std： ：allocator< struct CvPoint> > :: std :: vector< struct CvPoint，class std :: allocator< struct CvPoint> >（unsigned int，const struct CvPoint&，const class std :: allocator< struct CvPoint>&）'：不能将参数1从'class std :: deque< struct CvPoint，class std :: allocator< struct CvPoint& ; > :: iterator'to'unsigned int'没有可以执行此转换的用户定义转换运算符，或者无法调用运算符
 
 cvtrack.cpp（278）：error C2440：初始化'：不能从'struct cvb :: CvTrack * const'转换为'struct cvb :: CvBlob *'指向的类型是不相关的;转换需要reinterpret_cast，C风格的转换或函数式转换
  

这些问题？

感谢您提供帮助！

-------- UPDATE - -------

我试图编辑和更正代码，以消除我的问题中的三个错误。

错误C2664似乎更难于cirmumvent ...

  return new CvContourPolygon（dq.begin（），dq.end（））; 
  

其中CvContourPolygon是 typedef std :: vector< CvPoint> CvContourPolygon;

与

  deque ; int> :: iterator dq_it; dq_it = dq.begin（）; 
 CvContourPolygon v_tmp; 
 v_tmp.push_back（* dq_it）; 
 while（dq_it！= dq.end（））{
 v_tmp.push_back（* dq_it ++）; 
} 
  

首先，我写的是正确的？

错误（

假设第一行是318：

  cvcontour.cpp（319）：error C2679：binary'='：它接受类型为'std :: deque< struct CvPoint，class std :: allocator< struct CvPoint>> :: iterator'（或
，没有可接受的转换）的右手操作数
 cvcontour.cpp（321）：error C2664：'push_back'：无法将参数1从'int'转换为'const struct CvPoint&'
原因：无法从'int'转换为'const struct CvPoint'
没有构造函数可以接受源类型，或者构造函数重载解析不明确
 cvcontour.cpp（322）：error C2679：binary'！='：无操作符定义，它接受类型为'class'的右手操作数std :: deque< struct CvPoint，class std :: allocator< struct CvPoint>> :: iterator'（或没有可接受的转换）
 cvcontour.cpp（322）：fatal error C1903：以前的错误;停止编译
  

执行cl.exe时出错。

-------- UPDATE2 --------

此代码似乎工作正常！ p>

  deque< CvPoint> :: iterator dq_it; 
 dq_it = dq.begin（）; 
 CvContourPolygon v_tmp; 
 for（dq_it = dq.begin（）; dq_it！= dq.end（）; ++ dq_it）{
 v_tmp.push_back（* dq_it）; 
} 
 // return new CvContourPolygon（dq.begin（），dq.end（））; 
 return& v_tmp; C2371  -  VC6是局部变量的范围，它是一个很大的变量。C2371  -  VC6。应该能够通过使代码明确使用变量名来解决这个问题。
 
 
 
 C2664  - 看起来像使用deque迭代器初始化向量失败 -  vector :: vector上的错误重载（）被调用？ 
 
 
 
 C2440  - 检查对象是否兼容（VS2008似乎认为这样），并添加适当的演员。
 
 
 
编辑：
您的代码不应该是这样吗？
  deque< CVPoint> :: iterator dq_it; dq_it = dq.begin（）; 
 CvContourPolygon v_tmp; 
 for（dq_it = dq.begin（）; dq_it！= dq.end（）; ++ dq_it）
 {
 v_tmp.push_back（* dq_it）; 
} 
  
 
I'm using Microsoft Visual C++ 6.0 and Microsoft Visual Studio 2008 to develop an academic computer vision project. 

In this project i need to use OpenCV 1.1 (http://opencv.willowgarage.com/) and CvBlob (http://code.google.com/p/cvblob/). 

I tried to compile this project with Microsoft Visual Studio 2008 and it compiles without errors. 

With Visual C++ 6.0 i got a lot of errors. 

OpenCV are not responsible of this behavior, because a trivial project with only OpenCV (without CvBlob) works well.  

To understand the errors better I made an empty project with only the CvBlob inclusion. 

I paste here a brief summary of the errors:
cvcontour.cpp(253) : error C2371: 'i' : redefinition; different basic types (and others similar to this. i solved with variable redefinition, every time)

cvcontour.cpp(318) : error C2664: 'thiscall std::vector<struct CvPoint,class std::allocator<struct CvPoint> >::std::vector<struct CvPoint,class std::allocator<struct CvPoint> >(unsigned int,const struct CvPoint &,const class std::allocator<struct CvPoint> &)' : cannot convert parameter 1 from 'class std::deque<struct CvPoint,class std::allocator<struct CvPoint> >::iterator' to 'unsigned int' No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called

cvtrack.cpp(278) : error C2440: 'initializing' : cannot convert from 'struct cvb::CvTrack *const ' to 'struct cvb::CvBlob *' Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Have you ideas on how can i solve these problems? 

Thanks in advance for the help!

-------- UPDATE --------

I tried to edit and correct the code in order to elminate the three errors in my question. 

The error C2664 seems to be the more difficult to cirmumvent... 

I have replaced the indicted line 
return new CvContourPolygon(dq.begin(), dq.end());
where CvContourPolygon is a typedef std::vector<CvPoint> CvContourPolygon;

with 
deque<int>::iterator dq_it;dq_it = dq.begin();
CvContourPolygon v_tmp;
v_tmp.push_back(*dq_it);
while (dq_it != dq.end()){
  v_tmp.push_back(*dq_it++);
}
First, what that i wrote is correct? Than, how can i solve the errors that occured from this?

Thank you in advance!

Errors (suppose that the first line is 318: 
cvcontour.cpp(319) : error C2679: binary '=' : no operator defined which takes a right-hand operand of type 'class std::deque<struct CvPoint,class std::allocator<struct CvPoint> >::iterator' (or 
there is no acceptable conversion)
cvcontour.cpp(321) : error C2664: 'push_back' : cannot convert parameter 1 from 'int' to 'const struct CvPoint &'
    Reason: cannot convert from 'int' to 'const struct CvPoint'
    No constructor could take the source type, or constructor overload resolution was ambiguous
cvcontour.cpp(322) : error C2679: binary '!=' : no operator defined which takes a right-hand operand of type 'class std::deque<struct CvPoint,class std::allocator<struct CvPoint> >::iterator' (or there is no acceptable conversion)
cvcontour.cpp(322) : fatal error C1903: unable to recover from previous error(s); stopping compilation
Error executing cl.exe.

-------- UPDATE2 --------

This code seems to work correctly!
deque<CvPoint>::iterator dq_it;
dq_it = dq.begin();
CvContourPolygon v_tmp;
for (dq_it = dq.begin(); dq_it != dq.end(); ++dq_it){
  v_tmp.push_back(*dq_it);
}
//return new CvContourPolygon(dq.begin(), dq.end());
return &v_tmp;

解决方案
C2371 - VC6 was sloppy with scope of local variables. Should be able to fix this by making the code use variable names unambiguously.

C2664 - looks like failure to initialize a vector using deque iterators - wrong overload on vector::vector() being called?  Probably have to work around this by manually copying the deque elements to the new vector somehow.

C2440 - check the objects are compatible (VS2008 seems to think so) and add the appropriate cast.

EDIT:
Shouldn't your code look like this?
deque<CVPoint>::iterator dq_it;dq_it = dq.begin();
CvContourPolygon v_tmp;
for (dq_it = dq.begin(); dq_it != dq.end(); ++dq_it)
{
  v_tmp.push_back(*dq_it);
}


                        
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