在Matlab中将向量场应用于图像 [英] Applying a vector field to image in matlab

问题描述

如何将通过颤动获得的矢量场应用于图像，使像素沿矢量方向移位(图像变形)?

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维地形上放置平面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?

谢谢您的时间

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:

目前尚不清楚轴的定向方式，但这是在峰值函数上映射的小丑图像.确切的步骤在 surface 的文档中进行了描述示例沿表面图显示图像"中的a>.

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)

基本上，您要使用 CData 作为要显示的图像来创建曲面，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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