Because they look fuzzy and the fuzziness impedes the processing of visual information.
ACDSee 5 from 2002 (or 2004) year does this automatically.
Sharpen the browser preview and the folder thumbnails
Moderators: helmut, XnTriq, xnview
Re: Sharpen the browser preview and the folder thumbnails
you can sharpen the thumbnail option/Thumbnails
Pierre.
Re: Sharpen the browser preview and the folder thumbnails
In XnView v1.98.1 this option does not sharpen the folder thumbnails and the browser preview even after thumbnail rebuilding.