MATLAB: Extract blocks from image

block

i wanted to extract 175 blocks of square size, from an image…. please can someone help me… my image is not divisible by 175… how should i resize it so that i can extract 175 blocks of equal size… please do reply….

Best Answer

[n,m,p]=size(im1)  % im1 is your image
n1=mod(-n,75)
m1=mod(-m,75)
new_im1=imresize(im1,[n+n1,m+m1]);

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MATLAB: Concatenation of images in one Matrix

I'd put them into a structure. You can attach each image variable to the structure as a new field.

my3images.smallImage = smallImage128;
my3images.mediumImage = mediumImage256;
my3images.bigImage = bigImage512;

This lets you save all 3 images in a single variable with no change in their size . You could have an array of these structures if you had multiple sets of images.

You could also use a 1 by 3 cell array if you want but I think cell arrays are more complicated because there's often confusion over whether to use parentheses of braces.

MATLAB: How to split the image into blocks and then extract the features from each block

See the FAQ: https://matlab.wikia.com/wiki/FAQ#How_do_I_split_an_image_into_non-overlapping_blocks.3F

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MATLAB: Concatenation of images in one Matrix

MATLAB: How to split the image into blocks and then extract the features from each block

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