How do divide a image into blocks and find the maximum value of each Block?

2 次查看（过去 30 天）
S .p.aramesh S
S .p.aramesh S 2015-10-21
回答： Image Analyst 2015-10-21
Actually i am doing ODBTC encoding for a color image.I do the RGB decomposition already.now i have to do divide a image into blocks and find the maximum value of each Block.Plz help me

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2015-10-21
blockproc()
  2 个评论
S .p.aramesh S
S .p.aramesh S 2015-10-21
thank u for reply,it is correct or not
I = imread(file_name); maxfun = @(block_struct) max(block_struct.data);
block_size = [50 50]; block_max = blockproc(I,block_size,maxfun); disp(block_max); figure imshow(block_max); title('Block Processing - Simplest Syntax');
Stefan Raab
Stefan Raab 2015-10-21
The line
max(block_struct.data);
will return a vector of maximum values if the input is a matrix. If you want only the largest element, you have to use
max(block_struct.data(:));
Then the matrix is converted to a vector before the max value is extracted.

请先登录，再进行评论。

更多回答（1 个）

Image Analyst
Image Analyst 2015-10-21
Walter and Stefan are correct. There is also some more complete code in the FAQ. I've also attached my two demos on blockproc(), for what it's worth. You can just modify it to take the max, like Stefan said.

类别

在 Help Center 和 File Exchange 中查找有关 Neighborhood and Block Processing 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!

Translated by