Convert wdp to art

What is the difference between .wdp and .art?

Description: Compressed raster image format developed by Microsoft; similar to the .JPG format, but uses a higher degree of compression and supports both lossy and lossless compression; used primarily for high-resolution digital photographs; can be used with several Microsoft products including Windows Photo Viewer, Windows Live Movie Maker (WLMM), and Microsoft Word.; PFS Art Publisher Image (ART) is a raster graphics file format used for storing digital images. It was developed by Progressive Networks for use in their Progressive FreeStyle Art Publisher software. ART files are compressed using the run-length encoding (RLE) algorithm, which allows them to store large images in a relatively small file size. The ART format supports up to 24-bit color and is often used for storing digital photos and other images.