dds The .dds extension file is a DirectDraw Surface format file developed by Microsoft and is used by the multimedia application Microsoft DirectX to store graphics and data in the compressed and uncompressed form.
hdr A .hdr extension file is a High Dynamic Range image format that is also known as HDRI or a Radiance HDR format. A raster image or a digital photo with dark shadows or washed out areas can be rectified using HDRsoft to enhance the color and improve the brightness level. The Multiple pictures having different exposures can also be combined to create one image with an even distribution of color with the HDR software. As compared to standard digital imaging or photographic techniques, HDR imaging uses a high technology to improve the picture quality of an image by increasing its clarity, brightness and luminosity.