JPF is a raster image category file format that is the successor to the .JPEG image format. Like some other file name extensions (.jpx, .jp2, .j2k), the .jpf extension refers to the JPEG 2000 image format. It is needed to designate the JPEG 2000 Image file type. And JPEG 2000 files are an international standard (ISO / IEC 15444) bitmap format. It was developed by the Joint Photographic Experts Group, JPEG. It serves as a good replacement for the JPEG standard, which is older, but, as before, is in demand and widespread. Compared to JPEG in JPF format, wavelet compression is used, due to the alpha channel transparency is supported, as well as a variety of color models. Also, compared to JPEG, this format provides better scalability of images, provides the ability to achieve smaller file sizes and have a higher level of quality. The format is able to combine compression with losses and without losses. Provides support for image transparency and additional metadata information. It can be viewed in QuickTime Player 7, as in recent versions of Photoshop, provided that the JPEG2000.8bi plugin is installed. Many images also have the extension .JP2 or .JPX.
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.