patch extraction of an image

Question

Pravita Lekshmanan 2019-6-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468010-patch-extraction-of-an-image

评论： Pravita Lekshmanan 2019-7-4

采纳的回答： KALYAN ACHARJYA

在 MATLAB Online 中打开

i dont know iwhether my code is right for extraction of patch from the right side of an image.

Here is the code:

figure;
[rowsl, columnsl]=size(iml);
blockSizeR=10;
blockSizeC=10;
% [rowsl, columns1]=size(iml);
%  for row = 1 : blockSizeR : rowsl
%   for col = 1 : blockSizeC : columns1
%       patch(:)= iml(:,columnsl:columnsl-blockSizeC);
%       imshow(patch);
%   end 
%   end% 

2 个评论
显示无隐藏无

KALYAN ACHARJYA 2019-6-20

Please share the image, also explain the question clearly.

Pravita Lekshmanan 2019-6-20

Sir i need to crop or extract simultaneous patches continuously from top right till bottom left of an image as shown below:

a blocksize of 10x10 like shown below and i need to plot it on a figure as subplots

I dont know how to do the same

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KALYAN ACHARJYA 2019-6-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/468010-patch-extraction-of-an-image#answer_380032

编辑：KALYAN ACHARJYA 2019-6-20

在 MATLAB Online 中打开

im=imread('new.jpeg');
k=1;
[rows colm]=size(im);
for i=1:10:rows-10
  for j=1:10:colm-10
      im_sub=im(i:i+9,j:j+9);
      subplot(round(rows/10),round(colm/10),k),imshow(im_sub);
      k=k+1;
  end 
end

Please note: If you do the same without loop, which is recomended. Also look at Block Processing

You can also save the all blocks in structure and call the individual cell struture in later.

im=imread('new.jpeg');
k=1;
im_sub={ };
[rows colm]=size(im);
for i=1:10:rows-10
  for j=1:10:colm-10
      im_sub{k}=im(i:i+9,j:j+9);
      k=k+1;
  end 
end