JP2 is a bitmap image format. The JP2 format, i.e. JPEG 2000 image, was developed by the Joint Photographic Experts Group. The JP2 file can be in the form of a photograph, drawing, digital fax, etc. File type: JPEG 2000 Core Image File. JPEG 2000 is the patent-pending bitmap image format. It has been licensed free of charge, and now it is an international standard (ISO / IEC 15444-1: 2004). Compared to the previous JPEG-1 standard, JPEG 2000 uses a completely different method to compress data (wavelet transform, wavelet transform). This method generally ensures higher image quality. It also gives a more compact file size. The JP2 format has a lot in common with the JPEG format, which is now especially popular. However, it differs in that it uses wavelet transform technology for compression, and discrete cosine transform has found application in JPEG. Using the first technology, you can get a better image, even when the file size is relatively smaller. There are also JP2 files with the extensions .J2K, JPF, MJ2, JPX and JPM. In order to open a file of this format, that is, to edit, use programs such as Mozilla Firefox, Adobe Photoshop, ACD Systems ACDSee, Google Chrome.
PFM is a font metric data file. It is also one of the formats of the font file category. This applies to fonts in the Adobe Type 1 (= postscript) category used by the Microsoft Windows operating system. The format contains font character sizes. He asks for the font associated file extension .PFB. It does not have the glyphs of the font itself, but with its help, the correct display of the PFB file is obtained. PFM files, that is, the Printer Font Metrics File, contain metric information about the fonts that applications use to lay out lines of text in a document. PostScipt Type 1 fonts have multiple files. The package usually comes with a couple of files with the extensions PFB and PFM. However, there may be 3 files with the extensions AFM, PFB and INF, or all 4 files - PFM, PFB, INF, AFM. Windows 7 and Windows Vista must have PFM. Modern versions of Windows have built-in tools for installing fonts of all formats. The installation procedure is the same for all font formats, but it differs for different versions of Windows. After installation, you may need to restart the application. Only then will the new fonts appear in the font list. You can open the PFM file using programs such as Adobe Photoshop, Adobe Creative Suite, Microsoft Windows Font Viewer, Microsoft Windows.