CRW is a highly specialized graphic file format developed by the manufacturer of the famous Canon cameras. It is designed to record “raw” images captured by different models of a digital camera Canon. In its characteristics, it is very similar to another proprietary format of this developer - CR2. The main advantage of the CWR format is the preservation of the quality of the digital image as it comes from the camera matrix. The format also contains metadata, namely: conditions for photographing and fixing the image, default image processing settings, camera model.
DDS is a graphic format, bitmap image. DDS stands for Abbreviation for the DirectDraw Surface. This format, developed by Microsoft, is usually used to store textures for 3D environments (for example, in computer games or 3D models, including new-generation game consoles). The format is designed specifically for use in the Microsoft DirectX environment, however, in OpenGL, the use of DDS files is also possible. Even when compressed, the texture quality is preserved in the DDS files. Compression of files of this format is possible using DirectX Texture Compression technology.