Suppose I have a 3D array of image samples I(i,j,k), i=1...M, j=1...N, k=1...P.
In world coordinates, pixel spacing in millimeters along the i,j, and k sampling directions are di, dj,and dk respectively. Now, I wish to create an imref3d object relating these samples to my world coordinates.
Question: According to the conventions of imref3d, are the world X, Y, and Z axes considered to be aligned respectively with increasing i,j, and k? Or is it j,i, and k like with meshgrid? Or something else entirely?
I am trying to determine whether, when using the construction syntax
R = imref3d(imageSize,pixelExtentInWorldX,pixelExtentInWorldY,pixelExtentInWorldZ)
the proper substitions of my parameters are as follows,
R = imref3d([M,N,P] , di, dj, dk)
or something else? And what about imref2d? Any fundamental differences between the 3d and 2d conventions?