在matlab中将矢量场应用于图像 [英] Applying a vector field to image in matlab

问题描述

如何将通过 quiver 获得的矢量场应用于导致像素在矢量方向上位移的图像(图像扭曲)?

How do I apply a vector field obtained via quiver, to an image which causes the pixels to displace in the direction of the vectors (image is warped)?

此外，如果我拥有的矢量场是 3 维的，我该怎么做?可以将其视为在 3 维地形上放置平坦的 2 维图像.我将如何在 matlab 中查看此内容?

Also, if the vector field I have is 3 dimensional, how would I do this? Think of it as laying down a flat 2 dimensional image over a 3 dimensional terrain. How would I go about viewing this in matlab?

感谢您的时间

我不仅要在 Z 轴上扭曲图像，还要在 X 和 Y 轴上扭曲图像.

I have to warp the image not just in the Z axis, but along the X and Y axes as well.

推荐答案

在 3 维地形上放置平面 2 维图像:

Laying down a flat 2 dimensional image over a 3 dimensional terrain:

轴的方向不是很清楚，但这是映射到峰函数上的小丑图像.surfacea> 在示例沿曲面图显示图像"中.

It's not very clear the way the axes are oriented but this is an image of a clown mapped on the peaks function. Exact steps are described in the documentation of surface in the example 'Display image along surface plot.'

load clown
C = flipud(X);
figure
surface(XD,YD,ZD,C,...
    'FaceColor','texturemap',...
    'EdgeColor','none',...
    'CDataMapping','direct')
colormap(map)
view(-35,45)

本质上，您使用 CData 作为要显示的图像创建表面，并为轴设置适当的颜色图.

Essentially, you create your surface with CData as the image you want to be displayed and set an appropriate colormap for the axes.

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