MATLAB 3D体积可视化

Question

I have a matrix M, 135*191*121 double and want to plot it in 3D volume by using those 121 slices. How can I do this? (I need a grayscale image)

Regards

Answer 1

Check out vol3d v2 , it an update to Joe Conti's vol3d function, allowing voxel colors and alpha values to be defined explicitly. In cases where voxels can be any RGB color, use:

 vol3d('CData', cdata);

where cdata is an MxNxPx3 array, with RGB color along the 4th dimension. In cases where color and alpha values are highly independent, specify an MxNxP alphamatte as follows:

vol3d('CData', cdata, 'Alpha', alpha);

Answer 2

if you have 3 arrays, storing (x,y,z) coordinates of every point that you need to plot, then you can use function plot3
From matlab help

PLOT3 Plot lines and points in 3-D space. PLOT3() is a three-dimensional analogue of PLOT().

 PLOT3(x,y,z), where x, y and z are three vectors of the same length, plots a line in 3-space through the points whose coordinates are the elements of x, y and z. PLOT3(X,Y,Z), where X, Y and Z are three matrices of the same size, plots several lines obtained from the columns of X, Y and Z. Various line types, plot symbols and colors may be obtained with PLOT3(X,Y,Z,s) where s is a 1, 2 or 3 character string made from the characters listed under the PLOT command. PLOT3(x1,y1,z1,s1,x2,y2,z2,s2,x3,y3,z3,s3,...) combines the plots defined by the (x,y,z,s) fourtuples, where the x's, y's and z's are vectors or matrices and the s's are strings. Example: A helix: t = 0:pi/50:10*pi; plot3(sin(t),cos(t),t); PLOT3 returns a column vector of handles to lineseries objects, one handle per line. The X,Y,Z triples, or X,Y,Z,S quads, can be followed by parameter/value pairs to specify additional properties of the lines. 

for 3d plots you may also want to look into surf function