how to save a double m*n*3 matrix as one of image formats with no losing informataion?
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hi. I have a double m*n*3 matrix and I want to save it as one of the standard image formats. I converted it to uint16, and saved it as png:
imwrite(im2uint16(im)),'rgb.png','BitDepth',16,'map','RGB','Mode','lossless');
but when I read it again
i =imread('rgb.png');
% convert it to double again
i=im2double(i)*255;
some pixels had changed one number bigger or smaller. How can I prevent it?
0 commentaires
Réponses (1)
Image Analyst
le 10 Sep 2016
Don't use im2uint16. Just use uint16. Your floating point data had better be integers in the uint16 range though. Otherwise the number will get changes as it's rounded to the nearest integer. If you want to retain the full floating point accuracy, then use save() to save it to a .mat file, instead of using imwrite().
Voir également
Produits
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!