获得OpenCV的图像类型的枚举的名称（如CV_32FC1）？(Getting enum names

在C ++接口OpenCV的，它似乎很容易检查的图像的类型。 如果你有一个形象cv::Mat img = cv::imread("someImage.xyz")你只是做int theType = img.type()

然而，正如你所期望的，调用img.type()只是给出了一个整数，一个不枚举名称（例如CV_32FC1 ）。

有一种简单的方法来打印出枚举名称（例如CV_32FC1 ）如果我知道OpenCV的枚举的整数值？

Answer 1:

据我所知，这样的功能并不在OpenCV中存在。

我想你会离开编写自己的函数来得到那些更好。 很多开关的情况下，但我想它的工作。 枚举可以发现在这里 。

编辑：

这是你可以用它来提取类型。 我猜有可能是一个更有效的方法，但我不能左右它现在换我的头。

std::string getImageType(int number)
{
    // find type
    int imgTypeInt = number%8;
    std::string imgTypeString;

    switch (imgTypeInt)
    {
        case 0:
            imgTypeString = "8U";
            break;
        case 1:
            imgTypeString = "8S";
            break;
        case 2:
            imgTypeString = "16U";
            break;
        case 3:
            imgTypeString = "16S";
            break;
        case 4:
            imgTypeString = "32S";
            break;
        case 5:
            imgTypeString = "32F";
            break;
        case 6:
            imgTypeString = "64F";
            break;
        default:
            break;
    }

    // find channel
    int channel = (number/8) + 1;

    std::stringstream type;
    type<<"CV_"<<imgTypeString<<"C"<<channel;

    return type.str();
}

Answer 2:

继@鲍勃的建议，我写我自己的函数来解决这个问题。 这里是：

// take number image type number (from cv::Mat.type()), get OpenCV's enum string.
string getImgType(int imgTypeInt)
{
    int numImgTypes = 35; // 7 base types, with five channel options each (none or C1, ..., C4)

    int enum_ints[] =       {CV_8U,  CV_8UC1,  CV_8UC2,  CV_8UC3,  CV_8UC4,
                             CV_8S,  CV_8SC1,  CV_8SC2,  CV_8SC3,  CV_8SC4,
                             CV_16U, CV_16UC1, CV_16UC2, CV_16UC3, CV_16UC4,
                             CV_16S, CV_16SC1, CV_16SC2, CV_16SC3, CV_16SC4,
                             CV_32S, CV_32SC1, CV_32SC2, CV_32SC3, CV_32SC4,
                             CV_32F, CV_32FC1, CV_32FC2, CV_32FC3, CV_32FC4,
                             CV_64F, CV_64FC1, CV_64FC2, CV_64FC3, CV_64FC4};

    string enum_strings[] = {"CV_8U",  "CV_8UC1",  "CV_8UC2",  "CV_8UC3",  "CV_8UC4",
                             "CV_8S",  "CV_8SC1",  "CV_8SC2",  "CV_8SC3",  "CV_8SC4",
                             "CV_16U", "CV_16UC1", "CV_16UC2", "CV_16UC3", "CV_16UC4",
                             "CV_16S", "CV_16SC1", "CV_16SC2", "CV_16SC3", "CV_16SC4",
                             "CV_32S", "CV_32SC1", "CV_32SC2", "CV_32SC3", "CV_32SC4",
                             "CV_32F", "CV_32FC1", "CV_32FC2", "CV_32FC3", "CV_32FC4",
                             "CV_64F", "CV_64FC1", "CV_64FC2", "CV_64FC3", "CV_64FC4"};

    for(int i=0; i<numImgTypes; i++)
    {
        if(imgTypeInt == enum_ints[i]) return enum_strings[i];
    }
    return "unknown image type";
}

难道我忘了，包括在我的查找表的任何OpenCV的图像类型？

文章来源: Getting enum names (e.g. CV_32FC1) of OpenCV image types?