i am facing this error.

Attempted to access voxels(:,4); index out of bounds because size(voxels)=[753571,3].

Error in CreateVisualHull (line 12)
voxels(:, 4) = zeros(size(voxels(:, 4)));

[John D'Errico]

What about the error don't you understand?

voxels is an array of size 753571 by 3. Surely you know that by reading the first line of what you posted.

But you tried to access voxels(:,4) on the right hand side of that line, thus in:

Error in CreateVisualHull (line 12) voxels(:, 4) = zeros(size(voxels(:, 4)));

[Masood Alam]

Thank u sir

Answer 1

[Walter Roberson]

The input for https://www.mathworks.com/matlabcentral/fileexchange/45989-visual-hull-matlab is not well documented, but looking through the routines, voxels(:,1) should be x coordinates, voxels(:,2) should be y coordinates, voxels(:,3) should be z coordinates, and voxels(:,4) should be some kind of value (for example brightness) for the pixel.