OUT OF MEMORY PROBLEM
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I have 3 data sets such as , SourceCords(16777216*3), DetectorCords(16777216*3),Voxel(16777216*3). Apart from the Voxel data rest of the 2 datasets were generated during excuting the other line of the codes. Now I want to build a function called attenuation lengths .
[len_ijk, ind_ijk] = ( attenuationLengts(Nx, Ny, Nz, d, dz, bx, by, bz, sourceCords, detectorCords));
Nx, Ny, Nz, d, dz, bx, by, bz= Constant Value.
As you can see that my data size is large it is giving me the error : "Out of memory". At this point I tried clear the unnecessary variables to save some memory but I also got the error : "Out of memory attempting to serialize data for transmission".
I tried another way, I put :::::: tall ( attenuationLengts(Nx, Ny, Nz, d, dz, bx, by, bz, sourceCords, detectorCords));
But still not working as I found later that to use the "Tall Array" youd need to store the data first, but for my case I am not getting my data from the function so I can not store it anyway.
Could anyone can give me some probable solution???????????
Matt J on 13 Jul 2021
I have the vague impression that you are trying to compute a projection matrix for the purpose of tomographic forward and back projection. It is unrealistic to do that for realistic system sizes. You should consider existing forward/back projection algorithm libraries, e.g.,