% determine possible combinations of tile sizes
clear all, close all, Nx=2880; Ny=2176; px=[]; py=[];
for i=2:(Nx/15)
  if mod(Nx,i)==0, px=[px i]; end
end
for i=2:(Ny/15)
  if mod(Ny,i)==0, py=[py i]; end
end
n=0;
for i=1:length(px)
  for j=1:length(py)
    n=n+1;
    pnx(n)=px(i);
    snx(n)=Nx/pnx(n);
    pny(n)=py(j);
    sny(n)=Ny/pny(n);
    pnxpny(n)=pnx(n)*pny(n);
  end
end
[pnxpny i]=sort(pnxpny);
pnx=pnx(i); pny=pny(i);
snx=snx(i); sny=sny(i);
[pnxpny' pnx' pny' snx' sny']


     npx*npy         npx         npy         snx         sny
         384          48           8          60         272
         384          96           4          30         544
         384         192           2          15        1088
         408           3         136         960          16
         408           6          68         480          32
         408          12          34         240          64
         408          24          17         120         128
         480          30          16          96         136
         510          30          17          96         128
         512          32          16          90         136
         544          32          17          90         128
         576          36          16          80         136
         612          36          17          80         128
         640          40          16          72         136
         680          40          17          72         128
         720          45          16          64         136
         765          45          17          64         128
         768          24          32         120          68
         816          24          34         120          64
         960          30          32          96          68
        1020          30          34          96          64
        1024          32          32          90          68
        1088          32          34          90          64
        1152          36          32          80          68
        1224          36          34          80          64
        1280          40          32          72          68
        1360          40          34          72          64
        1440          45          32          64          68
        1530          45          34          64          64
        1536          48          32          60          68
        1632          48          34          60          64
        1920          60          32          48          68
        2040          60          34          48          64

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% determine possible combinations of tile sizes
clear all, close all, Nx=5760; Ny=4352; px=[]; py=[];
for i=2:(Nx/30)
  if mod(Nx,i)==0, px=[px i]; end
end
for i=2:(Ny/30)
  if mod(Ny,i)==0, py=[py i]; end
end
n=0;
for i=1:length(px)
  for j=1:length(py)
    n=n+1;
    pnx(n)=px(i);
    snx(n)=Nx/pnx(n);
    pny(n)=py(j);
    sny(n)=Ny/pny(n);
    pnxpny(n)=pnx(n)*pny(n);
  end
end
[pnxpny i]=sort(pnxpny);
pnx=pnx(i); pny=pny(i);
snx=snx(i); sny=sny(i);
[pnxpny' pnx' pny' snx' sny']

     npx*npy         npx         npy         snx         sny
         480          30          16         192         272
         510          30          17         192         256
         512          32          16         180         272
         544          32          17         180         256
         576          36          16         160         272
         612          36          17         160         256
         640          40          16         144         272
         680          40          17         144         256
         720          45          16         128         272
         765          45          17         128         256
         768          24          32         240         136
         816          24          34         240         128
         960          30          32         192         136
        1020          30          34         192         128
        1024          32          32         180         136
        1088          32          34         180         128
        1152          36          32         160         136
        1224          36          34         160         128
        1280          40          32         144         136
        1360          40          34         144         128
        1440          45          32         128         136
        1530          45          34         128         128
        1536          48          32         120         136
        1632          48          34         120         128
        1920          60          32          96         136
        2040          60          34          96         128
        2048          64          32          90         136
        2176          64          34          90         128
        2304          72          32          80         136
        2448          72          34          80         128
        2560          80          32          72         136
        2720          80          34          72         128
        2880          90          32          64         136
        3060          90          34          64         128
        3072          48          64         120          68
        3264          48          68         120          64
        3840          60          64          96          68
        4080          60          68          96          64
        4096          64          64          90          68