how to put the image that is sky background in the 3D axes in plot

please help me with 'how to put the image of sky to background of 3D axis, in the graph what i have plotted'.

[Walter Roberson]

How should the image move when you change the viewpoint?

Is it necessary that the image be part of the same 3D axis, or could it be a different axis that is visually "behind" the 3D axis?

[Image Analyst]

Or, do you just want a sky blue background to the plot instead of the default white?

Answer 1

[Thorsten]

You can show an image in 3D using surf

I = imread('cameraman.tif');
[X Y] = meshgrid(1:size(I,1), fliplr(1:size(I,2)));
surf(X, ones(size(I)), Y, I,'EdgeColor','none')

or

surf(X, Y, ones(size(I)), I,'EdgeColor','none')

or

surf(ones(size(I)), X, Y, I,'EdgeColor','none')

[Mike Garrity]

Yes, you can use surf like this. It's a bit more efficient to do something like this though:

I = imread('cameraman.tif');
z_off = -10;

X = [1 size(I,2)];
Y = [size(I,1) 1];
Z = z_off + zeros(2);
surf(X,Y,Z,I,'FaceColor','texture','EdgeColor','none')

That results in a surface which only has 4 vertices, rather than one with 1 vertex for each pixel, which is what you get if you make X,Y, & Z the same size as I.

Also, starting in R2014b, you can use image in 3D. The tricky bit is that the image object doesn't have Z coordinates. But you can use hgtransform to move it to the location you'd like.

g = hgtransform;
image(I,'Parent',g)
axis ij
g.Matrix = makehgtform('translate',[0 0 z_off]);