TileZoom Plugin is an image zoom plugin which uses image tiles and provides a convenient way to zoom in and zoom out of high-resolution images.
Here you can find more info about jQuery TileZoom Plugin.
On this TileGenerator demo page you can try to upload your own image and see jQuery TileZoom Plugin in action.
Clone the repo, git clone git://github.com/ematsakov/tilezoom.git, or download the latest release.