PGFext

PGF for extra large images

Tile structures are particularly suitable for extremely large images, such as those found in medicine, cartography, and aerial or satellite imagery. In a tile structure, each tile is an independently encoded image, with all tiles stored together in a single file or database.

PGFext uses a regular tiling structure. The individual tiles are saved in either PGF or PNG format using libPPP. The more efficient codec is automatically selected depending on the image content. Any region of interest (ROIs) can be selected via a preview image of the whole image and used for data extraction or storage.

PGFext is a tiling structure for natural and artificially generated images. The individual tiles are encoded using libPPP and are thus stored very efficiently in terms of memory, regardless of the image content. Across all tiles, PGFext maintains a preview image that can be visualized immediately.