Overlap a surf() over an image() with different colormap

Hi!

I have to different objects, one is an image, the other is a surface wit x,y,z,and c components.

When I do surf() by itself i get a nice colormap from red to blue (the jet one), but when i do

% Image data

im1 = imagesc(pic); hold on

% Strain data

x1 = pic_data{1}{1};

y1 = pic_data{1}{2};

z1 = zeros(size(x1,1),size(x1,2));

c1 = strain_data{1}{variable};

s1 = surf(x1,y1,z1,c1,'FaceAlpha',0.5);

I can't observe the changes in the s1 surface colormap.

Any ideas?

Answer 1

[Image Analyst]

Are you thinking of something like this: http://www.mathworks.com/matlabcentral/fileexchange/29485-meshcanopy

[Image Analyst]

Or maybe http://www.mathworks.com/matlabcentral/fileexchange/28106-texture-patch

Answer 2

[Walter Roberson]

convert your imagesc to truecolor (RGB) so that you can image() it without caring about the color map. That frees the colormap for the surf() purposes.

See the File Exchange contribution freezeColors()

[Ricardo Ferreira]

That's what i'm doing, and it's not working...

[Image Analyst]

Can you attach pic, pic_data, and strain_data so we can try your code?

[Ricardo Ferreira]

I would like to make imagesc or imshow of an image, and then put a surf like the one in the bottom over it, but maintaining the colormap. Attention, because the surface ranges from -1 to 1!

When i do imagesc(a),hold on, surf(s), view(2)

The colormap of the 2nd image is lost and I get only the blue color

[Image Analyst]

But your bottom array is only 50 by 45 while the image above is much larger than that. Where exactly did you want to put this smaller image in the larger image? In the middle, upper left, or do you want to scale it to the same size as the larger image?

Answer 3

[Walter Roberson]

Download and install http://www.mathworks.com/matlabcentral/fileexchange/35354-multiple-colormaps. Then,

%choose a colormap for the first plot. If you want to use the default
%then comment out this next line:
colormap pink;

%record the colormap in use
cmaps{1} = colormap();

%plot first object
h(1) = imagesc(a);

hold on

%choose a colormap for the second plot. If you want to use the default
%or the same as the previous, then comment out this next line:
colormap flag;

%record the colormap in use
cmaps{2} = colormap();

%plot the second object
h(2) = surf(s);

%Now manipulate the colormap and settings so the two plots are independent:

multicmap(h, cmaps);

Answer 4

[Ricardo Ferreira]

Thank you all, but i could solve the problem using set(handle,'CLim') in the surface object!