如何使用opencv设置某个像素的色调值 [英] how to set hue value of some pixel with opencv

问题描述

我需要更改图像某些像素的色调，但我不知道如何设置它们！

I need to change the hue of some pixels of my image, but i don't know how to set them!

我用 CV_BGR2HSV 转换了 HSV 中的图像，现在我用 for by rows 和 cols 循环......

I converted the image in HSV with CV_BGR2HSV and now i'm cycling with a for by rows and cols...

如何访问每个像素的色调?

how can I access each pixel's hue?

用于设置 RGB 我正在使用此代码...

for setting RGB i'm using this code...

CvScalar s;
s=cvGet2D(imgRGB,i,j); // get the (i,j) pixel value
printf("B=%f, G=%f, R=%f\n",s.val[0],s.val[1],s.val[2]);
s.val[0]=240;
s.val[1]=100;
s.val[2]=100;
cvSet2D(imgRGB,i,j,s); // set the (i,j) pixel value

推荐答案

您已经将图像转换为 HSV，因此图像的 3 层现在对应于色相、饱和度和值:

You already converted your image to HSV, so the 3 layers of the image now correspond to Hue, Saturation and Value:

• s.val[0] 是色调.
• s.val[1] 是饱和度.
• s.val[2] 是值.

• s.val[0] is the hue.
• s.val[1] is the saturation.
• s.val[2] is the value.

所以继续使用与 RGB 图像完全相同的方法来获取和设置像素值.

So go ahead and use exactly the same method as for your RGB images to get and set the pixel values.

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