Not possible as far as I’m aware, but thumbnails do annoy me. Either they are processed smaller version of the full image – a form of duplication. Or the full version is used but displayed smaller – bandwidth, page loading times and browser image resizing beauty niggles.
Progressive JPEGs load progressively with each iteration enhancing the previous. The first iteration will be poor quality but probably good enough to pass as a thumbnail. Then if the full image is wanted the browser will just download what it doesn’t already have.
Anyone know if this is possible?
