i want to divide into subblocks in 1:2:1 proportion(As in the attached fiures) how do i do that

please let me know if there is any possiblity of using mat2cell for this

[Rik]

clone of earlier question: https://www.mathworks.com/matlabcentral/answers/379972-how-do-i-divide-image-into-subblocks-in-1-2-1-proportion-like-shown-in-the-figure