450 Paint Shop Pro Image 6.0 Image (Raster) The Paint Shop Pro (PSP) file format is an extremely rich graphics file format that is capable of describing a multi-layered image document in minute detail. The format facilitates the retention of a great deal of information, including layer bitmaps, layer masks, layer vector data, layer adjustment data, layer grouping information, multiple sample thumbnails, multiple sample composite images, image dimension, image resolution, creator name, copyright owner, image description, EXIF information, masks, selections, alpha channels, etc. The PSP format supports storing image bitmaps in an uncompressed format or, to reduce the size of the file, in either Run Length Encoding (RLE) or LZ77 compressed format. As each of these is a lossless storage method, the PSP format always maintains the original quality of stored image documents. Finally, the PSP format supports storing image bitmaps at a variety of bit depths, including 24-bit colour (16.7 million colours), 8-bit colour (256 colour), 8-bit greyscale (256 greys), 4-bit colour (16 colours), and 1-bit colour (2 colours). Text 180 The National Archives and Records Administration / The National Archives and Records Administration 02 Aug 2005 http://www.telegraphics.com.au/svn/pspformat/trunk/psp8spec.pdf 11 Jun 2012 x-fmt/297 PUID psp File extension pspimage File extension 511 Paint Shop Pro Image 6 Header 32 byte PSP signature (ASCII: Paint Shop Pro Image File); followed by 2 byte little-endian major version 1 Absolute from BOF 0 5061696E742053686F702050726F20496D6167652046696C650A1A00000000000600 Is previous version of 451 Paint Shop Pro Image Is subsequent version of 326 Paint Shop Pro Image