how to find integers coordinate in a 4 coordinate block

hi

im new in the matlab world and i have a problem

i have 4 Matrices in UV axis :

uv1=[umin; vmin; ones(size(P1U))];% (umin,vmin)
uv2=[umax; vmax; ones(size(P2U))];% (umax,vmax)
uv3=[umin; vmax; ones(size(P3U))];% (umin,vmax)
uv4=[umax; vmin; ones(size(P4U))];% (umax,vmin)

Each column in each matrix contains a coordinate(integers) ..all four matrices containing in each column coordinates that build a block i need to find all the integer coordinates in Each block and arrange them in two matrices one for U and one for V, Each column in U corresponds to the column in V

i added a link for picture:

https://www.dropbox.com/s/bdvh6xzmjbyurhf/example.jpg

U=

 1 5 8
 2 6 0
 3 7 0
 4 0 0

V=

 2 5 7
 3 6 0
 4 7 0
 8 0 0

thanks