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The BMP file format, or bitmap, is a raster graphics image file format used to store bitmap digital images, independently of the display device (such as a graphics adapter), especially on Microsoft Windows [2] and OS/2 [3] operating systems.
In some contexts, the term bitmap implies one bit per pixel, whereas pixmap is used for images with multiple bits per pixel. [3] [4] A bitmap is a type of memory organization or image file format used to store digital images. The term bitmap comes from the computer programming terminology, meaning just a map of bits, a spatially mapped array of ...
Data in a RAW-file is structured according to the Bayer filter's pattern in cameras that use a single image sensor. Debayering, the process of obtaining bitmap data from a RAW-image is always a lossy operation. [citation needed] In addition, some downsampling is always performed, again reducing image information.
Scanned images often have a lot of noise. The bitmap image may need a lot of work to clean it up. Erase stray marks and fill in lines and areas. Corel advice: Put the image on a light table, cover it with vellum (tracing paper), and then manually ink the desired outlines. Then scan the vellum and use an automated raster-to-vector conversion ...
When converted to a 192×128 PPM image, the file size is 73,848 bytes. Filesize reduction factor 100 or so when converting to png is typical if the image is a line drawing; if the image is a photo, it is best converted to jpeg, which yields a greater filesize reduction.
The user can also rename multiple images, remove scratches, create panorama pictures (stitch), convert RAW photos (from Canon, Nikon, Olympus, etc. cameras), send images via Skype, send photo SMS, burn digital watermarks, correct colors, run a screen show, convert and correct JPEG images in a batch process, rename fields, open pictures and ...
Raster images include digital photos. A raster image is made up of rows and columns of dots, called pixels, [1] [2] and is generally more photo-realistic. This is the standard form for digital cameras; whether it be a .raw file or .jpg file, the concept is the same. The image is represented pixel by pixel, like a microscopic jigsaw puzzle.
The image that you see on the right would be over 500 pixels wide if it were simply to be uploaded. There are several things that can be done about a very large image. If it is a scanned image, it can be rescanned at a lower resolution. If however the image is digital it must be either resized or cropped.