How to re size a too big image into small by keeping original values.
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?
Neeta Dsouza answered .
2025-11-20
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.