how to divide image into 16 by16 nonoverlapping blocks of 768 by 512 of original image and randomly scramble the blocks and reverse back to the original image from the scrambled image?

1 次查看（过去 30 天）
Aarach Sap
Aarach Sap 2017-7-20
回答： Etsuo Maeda 2018-6-20
how to divide image into 16 by 16 of unequal sized original image and randomly scramble the blocks. and again how to obtain the original image from the scrambled image?

请先登录，再回答此问题。

回答（1 个）

Etsuo Maeda
Etsuo Maeda 2018-6-20
When we have one unique point (x, y), the squared image can be divided into 4 blocks. Two points for 4-9 blocks, Three points for 4-16 blocks, and Four points for more. To generate unique random number, you can use randperm function. For the purpose of reconstruction image, use the difference between original image and generated block. Optimization toolbox will help you to search the minimum point of the difference.
HTH

类别

在 Help Center 和 File Exchange 中查找有关 近傍処理とブロック処理 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!