Not the correct color on volshow

Hello,

I have this code

V_test=zeros(100,100,100);
V_test(10:20,10:20,10:20)=deal(1);
V_test(80:90,10:20,10:20)=deal(2);
V_test(45:55,45:55,45:55)=deal(3);
value=0:3;
color=[0,0,0;1,0,0;0,1,0;0,0,1];
queryPoints=linspace(min(value),max(value),256);
colormap = interp1(value,color,queryPoints);

figure(1)
myvol=volshow(V_test,Colormap=colormap);

I want the grey cube to be blue. It is blue on certain angle wich lead me to think it's a reflection issue but I'm not sure at all.

If anyone who's more familiar with volume rendering can help me that would be gratly appreciated :)

Answer 1

[Sufiyan]

Hi,

You can refer to the below code.

V_test=zeros(30,30,30);

% first cube
V_test(10:20,10:20,10:20)=1;
% second cube
V_test(80:90,10:20,10:20)=2;
% third cube
V_test(45:55,45:55,45:55)=3;

value=0:3;
color=[0,0,0;0.2,0.8,0;0,0,1;1,0,0]; 
queryPoints=linspace(min(value),max(value),256);
colormap = interp1(value,color,queryPoints);

figure(1)
myvol=volshow(V_test,'Colormap',colormap);

% Change the rendering method to MIP
myvol.RenderingStyle = 'VolumeRendering';

% Adjust the view angle of the MIP projection
view([30,30]);

hope this helps!

[Matteo Bonhomme]

Hello,

Sorry for coming back to you after so long.

This is helping thank you :)