Is there a substitute for blockproc in Matlab?

by

Here is an example using MAT2CELL. It dividing the image into N-by-M tiles, and handles the case when the image size is not evenly divisible by the number of tiles.

%# 2D grayscale image
I = imread('coins.png');

%# desird number of horizontal/vertical tiles to divide the image into
numBlkH = 4;
numBlkW = 4;

%# compute size of each tile in pixels
[imgH,imgW,~] = size(I);
szBlkH = [repmat(fix(imgH/numBlkH),1,numBlkH-1) imgH-fix(imgH/numBlkH)*(numBlkH-1)];
szBlkW = [repmat(fix(imgW/numBlkW),1,numBlkW-1) imgW-fix(imgW/numBlkW)*(numBlkW-1)];

%# divide into tiles, and linearize using a row-major order
C = mat2cell(I, szBlkH, szBlkW)';
C = C(:);

%# display tiles i subplots
figure, imshow(I)
figure
for i=1:numBlkH*numBlkW
    subplot(numBlkH,numBlkW,i), imshow( C{i} )
end

The input image and the resulting tiles:

input_image
tiles

More Related Contents:

  1. how to get a single feature vector from SIFT descriptor [closed]
  2. How can I convert an RGB image to grayscale but keep one color?
  3. How do I visualize a matrix with colors and values displayed?
  4. Use a vector as an index to a matrix
  5. How can I change the values of multiple points in a matrix?
  6. Construct adjacency matrix in MATLAB
  7. Image rotation by Matlab without using imrotate
  8. Nearest-neighbor interpolation algorithm in MATLAB
  9. Replace specific columns in a matrix with a constant column vector
  10. How can I apply a function to every row/column of a matrix in MATLAB?
  11. character reconstruction and filling for OCR
  12. Align already captured rgb and depth images
  13. Matrix “Zigzag” Reordering
  14. How do I compare all elements of two arrays?
  15. Building a matrix by merging the same row vector multiple times
  16. Matlab: repeat every column sequentially n times [duplicate]
  17. Explanation of the Histogram Equalization function in MATLAB [closed]
  18. Index of max and min value in an array
  19. How can I sort a 2-D array in MATLAB with respect to one column?
  20. Does Matlab eig always returns sorted values?
  21. How do I edit the axes of an image in MATLAB to reverse the direction?
  22. imresize – trying to understand the bicubic interpolation
  23. Loading multiple images in MATLAB
  24. How to change an image from Cartesian to Polar coordinates in Matlab?
  25. How to find out if a matrix is singular? [duplicate]
  26. the easiest way to convert matrix to one row vector [duplicate]
  27. Extract arbitrarily rotated plane of data from 3D array as 2D array
  28. Select largest object in an image
  29. Efficiently compute a 3D matrix of outer products – MATLAB
  30. Display matrix with row and column labels

Leave a Comment