Matlab：用imcontour填充等高线图 [英] Matlab: Filled contour plot with imcontour

问题描述

我正在尝试从MATLAB中的图像创建一个填充的等高线图。但是，命令 imcontour 似乎没有填充轮廓的选项。如果我使用 contourf ，它会绘制所有黑色轮廓线。由于图像具有很多轮廓水平，因此几乎完全以黑色显示。

是否有人知道如何填充 imcontour 或如何在图像上有意义地应用 contourf ？

解决方案

imcontour 没有填充版本，因为从理论上讲，图像本身是填充版本。

  data = load（'clown'）; 
 img = ind2rgb（data.X，data.map）; 
 
 imshow（img）; 
持有
 imcontour（img（：，：，1），3）; 
  

你可以使用 contourf ，然后

I am trying to create a filled contour plot from an image in MATLAB. However, the command imcontour does not seem to have an option for filled contours. If I use contourf, it draws all the contour lines in black. Since the image has a lot of contour levels, it is shown almost completely in black.

Does anybody know how to make a filled imcontour or how to meaningfully apply contourf on an image?

解决方案

There is no filled version of imcontour because in theory, the image itself is the filled version.

data = load('clown');
img = ind2rgb(data.X, data.map);

imshow(img);
hold on
imcontour(img(:,:,1), 3);

You could use contourf though, and specify the line color. By specifying a value of 'none' no lines will be shown.

c = contourf(data, 2, 'LineColor', 'none')

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