OpenCV中的SVM：Visual Studio 2008报告错误错误（或者是对吗？） [英] SVM in OpenCV: Visual Studio 2008 reported error wrongly (or is it right?)

问题描述

我使用MS Visual Studio 2008，OpenCV，C ++和SVM进行OCR相关项目。至少我可以运行代码，直到昨天，当我打开项目继续工作，VS报告此错误：

I'm using MS Visual Studio 2008, OpenCV, C++ and SVM for a OCR-related project. At least I can run the code until yesterday, when I open the project to continue working, VS reported this error:

error C2664: 'bool CvSVM::train(const CvMat *,const CvMat *,const CvMat *,const CvMat *,CvSVMParams)' : cannot convert parameter 1 from 'cv::Mat' to 'const CvMat *'

之前没有发生，我没有改变任何与它相关的代码（我只是改变了内核的参数）。

It didn't happen before and I haven't changed any code relating to it (I only changed the parameters for the kernel).

代码错误是：

Mat curTrainData, curTrainLabel;
CvSVM svm;
.
.
.
svm.train(curTrainData, curTrainLabel, Mat(), Mat(), params);

如果我在代码上悬停，我还是得到这个提示： image 。

If I hover on the code, I still got this tip: image.

这意味着我的语法是没有错。那么为什么VS会报告这样的错误？

Which means my syntax isn't wrong. So why do VS bother to report such an error?

推荐答案

问题是你使用Opencv c ++引用比c引用。我的意思是CvMat是Opencv的C部分，而cv :: Mat属于cv命名空间是c ++部分。所以我的建议是将其转换为必需的格式。这里有一个到opencv cheat表的链接，只是查看前几行代码。它会告诉你如何做到。
从Mat转换为CvMat

The problem is you're using Opencv c++ reference than c reference. I mean CvMat is of C part of Opencv, Whereas cv:: Mat which belongs to "cv" namespace is of c++ part. So my suggestion is convert it into required format. Here is a link to the opencv cheat sheet, just check out the first few lines of code. it will tell you how to do it. Convert from Mat to CvMat

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