TIFF is a format that allows you to store raster graphics with tags. It was developed by Aldus Corporation in conjunction with Microsoft so that it can be used with PostScript. Aldus Corporation owns specifications. Subsequently, this company merged with Adobe Systems. It is she who now owns the copyright to these specifications. Typically, TIFF files (Tagged Image File Format) are with the extension .tiff or .tif. Aldus was specifically engaged in the development of the format in order to achieve the preservation of scanned images. The popularity of TIFF can be explained by the fact that it is preferred in order to store images that have a large color depth. The format is used to send faxes, scan, recognize texts. It is widely supported in the printing industry. TIFF was chosen as the main graphic format of the NeXTSTEP operating system. Then from this system TIFF support migrated to Mac OS X. At first, the format supported lossless compression. Then it was supplemented in order to support lossy compression in JPEG format. We emphasize that the maximum weight of a document, if stored in this form, is no more than 4 GB. To open a TIFF file larger than 2 GB, you must run Photoshop CS.
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.