Is it possible to subsample an image by deleting data then interpolating to create a blurred image, while keeping the resulting image the same size as the original image?

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Tevin
Tevin 2023-12-18
编辑： Walter Roberson 2023-12-19
Is it possible to subsample an image by deleting data then interpolating to create a blurred image, while keeping the resulting image the same size as the original image?
The code I am using below does the subsampling and interpolation but changes the image size. It looks smaller. See a part of my code below.
originalImage = imread(imagePath);
zeroPaddedImage = zeros(size(originalImage), 'like', originalImage);
zeroPaddedImage(:, 1:subsamplingFactor:end) = originalImage(:, 1:subsamplingFactor:end);
blurredImage = imresize(zeroPaddedImage, 1/subsamplingFactor, 'bicubic');

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Matt J
Matt J 2023-12-18
编辑：Matt J 2023-12-19
siz=size(originalImage);
tempImage=originalImage( 1:subsamplingFactor:end, 1:subsamplingFactor:end, :);
blurredImage = imresize(tempImage, siz(1:2), 'bicubic');
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Tevin
Tevin 2023-12-19
%Please see a part of my code
% Create a zero-filled image of the same size as the original
siz = size(originalImage);
zeroPaddedImage = zeros(size(originalImage), 'like', originalImage);
zeroPaddedImage(:, 1:factor:end, :) = originalImage(:, 1:factor:end, :);
blurredImage = imresize(zeroPaddedImage, siz(1:2), 'bicubic');
I have attached a file with the original image, the subsampled and the interpolated image. The interpolated image looks like the subsampled one. I want to fill the gaps by interpolating so it seemed like a blurry or noisy image, rather than a having gaps. Can you look at where my code is going wrong?
Matt J
Matt J 2023-12-19
Ran in:
originalImage=load('Images').originalImage;
subsamplingFactor=20;
siz=size(originalImage);
tempImage=originalImage( 1:subsamplingFactor:end, 1:subsamplingFactor:end, :);
blurredImage = imresize(tempImage, siz(1:2), 'bicubic');
montage({originalImage,blurredImage})

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