i am trying to apply SURF algorithm, http://www.mathworks.com/matlabcentral/fileexchange/28300 which is the algo to find the key points and matches corresponding two images, but the problem is that in my case , i want to apply that algo with two images, but they are of different dimension and so it fails to work, could you please tell what shall i do so that both images become equal dimensions.
MATLAB: Making two images of equal dimensions in MATLAB
image processingMATLAB
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One idea can be appying a transform that reduce the bigger image into an image of the same size of the smaller one. Then apply any similarity index that works with same sized images.
Try this:
clc; % Clear the command window.
close all; % Close all figures (except those of imtool.)
clear; % Erase all existing variables. Or clearvars if you want.
workspace; % Make sure the workspace panel is showing.
format long g;format compact;fontSize = 18;fprintf('Beginning to run %s.m ...\n', mfilename);A = dicomread ('HYP-P-040.MR.ALL_PHYSICS_JAMESO.0004.0002.2019.12.11.14.31.46.328125.178068929.IMA'); %T2Axial image
subplot(2, 2, 1);imshow(A, [], 'Colormap', gray(256))B = dicomread('metab1_dyn=0001_slice=0001.IMA'); %metabolite 1
subplot(2, 2, 2);imshow(B, [], 'Colormap', gray(256))[rowsa, colsa, numberOfColorChannelsa] = size(A)[rowsb, colsb, numberOfColorChannelsb] = size(B)if rowsa ~= rowsb || colsa ~= colb B = imresize(B, [rowsa, colsa], 'nearest');endsubplot(2, 2, 3);% Get RGB image
cmap = jet(256);rgbImage = ind2rgb(uint8(255 * mat2gray(B)), cmap);imshow(rgbImage, []);% Put both images into subplot
subplot(2, 2, 4);ha = imshow(A, [], 'Colormap', gray(256))hold on;hb = imshow(rgbImage)% Set opacity/transparency to something less than 1 (alpha).
% 1 is the default and it means the last image is opaque and the image below can't be seen.
hb.AlphaData = 0.4;
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