How to re size a too big image into small by keeping original values.

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I have an gray scale image of size uint16. when i try to open this image , i get warning that it is too big. I have tried imresize( ) function to make it small<512*512 uint8> in size. When i plot the original image and re sized image, the intensity gets decreased after re sizing . I want to re size original image without changing in its pixel values. Is there any solution?

Accepted Answer

Image Analyst
Image Analyst on 22 Apr 2014
Don't worry about it. Don't resize. Just ignore it and continue with your processing. It's just saying that it's scaling the image by shrinking it down to display it on your monitor. Again, ignore it and continue to work with your full sized images.
  2 Comments
Image Analyst
Image Analyst on 22 Apr 2014
Edited: Image Analyst on 22 Apr 2014
If you want, you can run this function to turn off benign warnings in your m-file.
function TurnOffWarnings
try
% To set the warning state, you must first know the message identifier for the one warning you want to enable.
% Query the last warning to acquire the identifier. For example:
% warnStruct = warning('query', 'last')
% messageID = warnStruct.identifier
% messageID =
% MATLAB:concatenation:integerInteraction
% Turn off this warning "Warning: Image is too big to fit on screen; displaying at 33% "
warning('off', 'Images:initSize:adjustingMag');
% Get rid of warning about roipolyold being deprecated:
% "Warning: Function ROIPOLYOLD will be removed in the future. Use ROIPOLY instead"
warning('off', 'images:removing:function');
% Get rid of warning about directory already existing:
% "Warning: Directory already exists."
warning('off', 'MATLAB:MKDIR:DirectoryExists');
% Turn off note "Warning: Added specified worksheet." that appears in the command window.
warning('off', 'MATLAB:xlswrite:AddSheet');
catch ME
errorMessage = sprintf('Error in function %s() at line %d.\n\nError Message:\n%s', ...
ME.stack(1).name, ME.stack(1).line, ME.message);
fprintf(1, '%s\n', errorMessage);
WarnUser(errorMessage);
end
return; % from TurnOffWarnings
You can add or delete warnings as you wish.

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