.WMP File Extension

Windows Media Photo, or "WMPhoto," image format developed by Microsoft; stores a raster image in a format similar to a .JPG; supports black and white, RGB, CMYK, or multi-channel graphic formats; also supports lossy and lossless compression optimized for digital photos.

WMP files also use the .WDP extension.

NOTE: Windows Media Photo is now known as HD Photo, which uses the .HDP extension.