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.
DCM is a special format for bitmap graphics that are used in medical equipment. This is also the format of communication lines. The development of this format was carried out by NEMA - the National Association of Electrical Equipment Manufacturers. This data reporting standard is owned by the International Electrical Manufacturers Association. The purpose of the DCM format, that is, DICOM Image File, is to receive and store in graphical form the results of the patient’s diagnostics - ultrasound studies, computed tomography, magnetic resonance imaging. The DICOM Image File file contains not only raster objects and expressions proper, but also information about a particular patient. This means that the DCM file is capable of containing personal information. Due to it, you can identify the patient and compare the image with a specific subject. Now the format is used as a standard for medical images. In order to open, that is, edit a file of this format, such programs are usually used: DicomWorks, ACD Systems Canvas, Adobe Photoshop, ezDICOM, IrfanView, XnView.