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.
EMF is a vector graphics file for Windows operating system applications. Most image editing applications recognize it. The format was developed in 2007 by Microsoft. This is an integral part of Windows and a version of the original Windows Metafile Format (WMF), extended and expanded. It only supports 16-bit data. Image color data is stored in RGB format. There is no support for CMYK data. EMF (i.e. Enhanced Windows Metafile) can be used as a graphical language for printer drivers. It is used, in particular, to store collections of graphic images of Microsoft Clip Gallery. WMF also found application when it is necessary to transfer information through the clipboard (clipboard). From the Windows operating system, writing and reading to a file of this format can be carried out quickly and without problems. An EMF file is opened using a variety of utilities. For this, for example, IrfanView, CorelDRAW, Inkscape and GIMP are suitable. EMF files, like WMF, have a list of entries. Each of them is a specific team for drawing. Arguments that were 16-bit in WMF became 32-bit in EMF. EMF has features that introduce new arguments.