OpenCV:将标量转换为不同的色彩空间 [英] OpenCV: convert Scalar to different color space

问题描述

我正在使用Scalar定义使用OpenCV绘制的矩形的颜色:

I am using a Scalar to define the color of a rectangle I am drawing with OpenCV:

rectangle(imgOriginal, Point(0, 0), Point(25, 50), Scalar(H, S, V), CV_FILLED);

但是，颜色是在HSV颜色空间中定义的，而不是RGB(imgOriginal是RGB).

However, the color is defined in HSV color space rather than RGB (imgOriginal is RGB).

如何将Scalar(或其输入，整数变量H，S和V)转换为RGB?

How do I convert Scalar (or its input, the integer variables H, S, and V) to RGB?

(到目前为止，我只找到了答案，告诉我如何使用cvtColor转换整个图像，这不是我想要的.)

(So far I only found answers telling me how to convert a whole image with cvtColor which is not what I want.)

推荐答案

虽然不是最佳方法，但您可以使用以下方法:

Although not optimal, You can use the following:

Scalar ScalarHSV2BGR(uchar H, uchar S, uchar V) {
    Mat rgb;
    Mat hsv(1,1, CV_8UC3, Scalar(H,S,V));
    cvtColor(hsv, rgb, CV_HSV2BGR);
    return Scalar(rgb.data[0], rgb.data[1], rgb.data[2]);
}

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