在OpenCV中等效于MATLAB的caxis [英] Equivalent of MATLAB’s caxis in OpenCV

问题描述

最近，我使用OpenCV库处理灰度图像，并使用MATLAB平台进行处理(效果很好)，如下所示:

Recently, I used the OpenCV library to process the gray image, and I used the MATLAB platform to process (it works well), just like this:

imagesc(I), colormap 'Jet',caxis[0 1];%want to show the Pseudocolor picture

如您所见，MATLAB有一个名为caxis的函数，该函数用于缩放伪色轴.

As you see, MATLAB has a function called caxis, which used to scale Pseudocolor axis.

我的问题是，OpenCV中是否有任何功能可以实现MATLAB的caxis功能?或者我应该如何实现该功能?

My question is, are there any functions in OpenCV that can realize the caxis function of MATLAB or how should I realize this function?

推荐答案

您拥有

You have the applyColorMap function. However it's always a mapping for values between 0 and 255, even if all your image's pixels have their value between 20 and 30 (for example).

如果要在最小值和最大值之间应用整个颜色图，则需要一个中间映射以将值规格化"为[0-255]比例.或者，您也可以创建自己的颜色映射，以最小和最大为参数，并相应地创建其完整表.

If you want to apply the whole colormap between your min and max values, you will need to have an intermediary mapping to "normalize" your values to a [0-255] scale. Or you could also create your own Color Map that would take a min and a max as arguments and create its full table accordingly.

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