运算符0和1在OpenCV的MorphologyEx（）函数中做了什么 [英] What does the Operator 0 and 1 do in MorphologyEx() function of OpenCV

问题描述

大家好，

我正在使用OpenCV的MorphologyEx（）函数编写代码，当我错误地将值0赋给函数的'Morphology Operator'参数时。



可以在功能规格中看到 [运营商值范围 ^ ]从2-6分别开始，关闭，渐变，顶部，底部操作。



该函数应该给运算符值0一些错误，但它工作正常，我收到的结果就像一个更强大的Closing过滤器。这个结果对我的项目有利，但我想知道它是什么过滤器。该函数还给出了一些操作符参数设置为1的结果。



如果有人知道运算符值0和1的作用，请告诉我。

Hello all,
I was writing a code with MorphologyEx() function of OpenCV, when i mistakenly gave value 0 to 'Morphology Operator' parameter of the function.

As can be seen in the function specs [^], the Operator value ranges from 2-6 for Opening, Closing, Gradient, Top, Bottom hat operations respectively.

The function should ve given some error with Operator value 0, but it worked fine, and the results i received were like a stronger Closing filter. This result is favourable for my project, but i want to know what filter it is. The function also gave some result with operator parameter set to 1.

If someone knows what the operator values 0 and 1 does, please let me know.

推荐答案

在框架提供的枚举中使用直接代码永远不是一个好主意...

如果检查源代码（OpenCV已打开） GitHub！）你会看到这个：

It is never a good idea to use direct codes where enums provided by the framework...
If you check the source code (OpenCV is on GitHub!) you will see this:

switch( op )
    {
    case MORPH_ERODE:
        // ...
        break;
    case MORPH_DILATE:
        // ...
        break;
    case MORPH_OPEN:
        break;
    case CV_MOP_CLOSE:
        // ...
        break;
    case CV_MOP_GRADIENT:
        // ...
        break;
    case CV_MOP_TOPHAT:
        // ...
        break;
    case CV_MOP_BLACKHAT:
        // ...
        break;
    default:
        CV_Error( CV_StsBadArg, "unknown morphological operation" );
}

如果你搜索后面的枚举，你会看到：

And if you search for the enum behind you will see this:

enum MorphTypes{
    MORPH_ERODE    = 0, //!< see cv::erode
    MORPH_DILATE   = 1, //!< see cv::dilate
    MORPH_OPEN     = 2, //!< an opening operation
                        //!< \f[\texttt{dst} = \mathrm{open} ( \texttt{src} , \texttt{element} )= \mathrm{dilate} ( \mathrm{erode} ( \texttt{src} , \texttt{element} ))\f]
    MORPH_CLOSE    = 3, //!< a closing operation
                        //!< \f[\texttt{dst} = \mathrm{close} ( \texttt{src} , \texttt{element} )= \mathrm{erode} ( \mathrm{dilate} ( \texttt{src} , \texttt{element} ))\f]
    MORPH_GRADIENT = 4, //!< a morphological gradient
                        //!< \f[\texttt{dst} = \mathrm{morph\_grad} ( \texttt{src} , \texttt{element} )= \mathrm{dilate} ( \texttt{src} , \texttt{element} )- \mathrm{erode} ( \texttt{src} , \texttt{element} )\f]
    MORPH_TOPHAT   = 5, //!< "top hat"
                        //!< \f[\texttt{dst} = \mathrm{tophat} ( \texttt{src} , \texttt{element} )= \texttt{src} - \mathrm{open} ( \texttt{src} , \texttt{element} )\f]
    MORPH_BLACKHAT = 6  //!< "black hat"
                        //!< \f[\texttt{dst} = \mathrm{blackhat} ( \texttt{src} , \texttt{element} )= \mathrm{close} ( \texttt{src} , \texttt{element} )- \texttt{src}\f]
};

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