Divide 256256 image into 22 blocks

Question

niranjan v 2019-1-25

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/441411-divide-256-256-image-into-2-2-blocks

回答： Walter Roberson 2019-1-25

I am working on a project of image processing (watermarking) & needs to divide 256*256 image into 2*2 blocks (overlaping) to get 4096 matrices.If anyone knows about it plz help me.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2019-1-25

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/441411-divide-256-256-image-into-2-2-blocks#answer_357967

在 MATLAB Online 中打开

if ndims(YourArray) == 2
  blocks2x2 = mat2cell(YourArray, 2 * ones(1,128), 2 * ones(1,128) );
else
  blocks2x2 = mat2cell(YourArray, 2 * ones(1,128), 2*ones(1,128), size(YourArray,3) );
end

(Really this can be done with just the second of those assignments without an 'if', but splitting the case permits you to avoid a warning.