MEF is Mamiya's own RAW format. A high-quality Japanese brand is well known to those who take professional photographs. His story began in the 1940s. It was then that camera designer Seiichi Mamiya and investor Tsunejiro Sugawara created Mamiya. Mamiya ZD cameras are the first mid-format digital cameras. The expanded name of the MEF format is Mamiya RAW Image. He gained fame as a format of "digital negatives". Mamiya has developed this format in order to use it in cameras of its own production. At the same time, the main goal was to store the photos in an uncompressed form, so that later they would be processed without losing quality. The format is built on the principle of a RAW file. It contains a complete set of information that is received from the camera lens. RAW images are uncompressed files. They can be customized using image editing software. They are often preferred by professional photographers, because they are tasked with having high-quality images with many details. An MEF file is capable of storing an image as if it had been made into a CCD camera device. In most cases, it is stored on a memory card, and then transferred to a computer in order to edit and publish.
PBM is a raster image category file format. It is a compact single-bit black and white image. In other words, this is a simple format that allows you to store black and white pictures. It can be easily formatted into text. In this raster image format, if the pixel is a byte of one, it represents black pixels. When it is a byte from zero, it represents white pixels. The format is referred to as the Portable Bitmap Image file type. How can I open this format? To do this, use programs such as Adobe Photoshop CS, some versions of ACD Systems, as well as Newera Graphics Converter Pro, Corel PaintShop Pro X6. The file has 1 bit per pixel. PBM is a type of PPM format. PBM, that is, Portable Bitmap, is part of the Netpbm graphics package along with a couple of other formats: PGM, that is, Portable Graymap; PPM, i.e. Portable Pixelmap. Occasionally, these three formats are combined under the general name PNM (Portable Anymap). These are intermediate files used in conversion processes supported by Portable Bitmap Utilities (these are applications that have open source code). The PBM format is linked in black and white bitmap images. In PGM, grayscale bitmaps. PPM stores color bitmaps.