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Vocabulary Term Definition Pixel the smallest discrete component of an image or picture on a CRT screen (usually a colored dot); "the greater the number of pixels per inch the greater the resolution" wordnetweb.princeton.edu/perl/webwn Megapixel A megapixel is equal to one million pixels (picture elements). Digital images are made up of thousands of these tiny, tile-like picture elements. www.digicamhelp.com/glossary/digital-photography-glossary/ Ppi Pixels per inch is part of how you would define the resolution of an object that is screen-based. Some use DPI and PPI interchangeably, though this is technically incorrect. creativecurio.com/graphic-design-glossary/ Dpi Dots Per Inch is a term that also refers to printing and the amount of ink that actually is placed upon the print medium. Dots Per Inch is a property of a print graphic and determines how it prints - its size and quality. ... www.d.umn.edu/itss/support/Training/Online/webdesign/glossary/d.html
Vocabulary Term Definition Aperture In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture of an optical system is the opening that determines the cone angle of a bundle of rays that come to a focus in the image plane. ... en.wikipedia.org/wiki/Aperture F-stop In optics, the f-number (sometimes called focal ratio, f-ratio, or relative aperture) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; in simpler terms, the f-number is the focal length divided by the "effective" aperture diameter. ... en.wikipedia.org/wiki/F-Stop Great Website http://www.uscoles.com/fstop.htm Shutter speed The length of time during which the camera shutter remains open. These speeds are expressed in seconds or fractions of a second. ie: 2, 1, 1/2, 1/4, 1/8, 1/15, 1/30, 1/60, 1/125, 1/250, 1/500, 1/1000, 1/2000, 1/4000, 1/8000. Each speed increment halves the amount of light. medianetcom.com/divermag/archives/dec96/glossary.html
Term Definition ISO Film speed or how sensitive the sensor/film is to light - http://en.wikipedia.org/wiki/ISO_speed White balance In photography and image processing, color balance is the global adjustment of the intensities of the colors (typically red, green, and blue primary colors). ... en.wikipedia.org/wiki/White_balance Adjusts the brightest part of a scene so it appears white. How a digital camera records color is affected by the source of light www.digicamhelp.com/glossary/digital-photography-glossary/ Jpg In computing, JPEG (, ) (named after the Joint Photographic Experts Group who created the standard) is a commonly used method of lossy compression for photographic images. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality. ... en.wikipedia.org/wiki/.JPG Gif The Graphics Interchange Format (GIF) is a bitmap image format that was introduced by CompuServe in 1987 and has since come into widespread usage on the World Wide Web due to its wide support and portability. en.wikipedia.org/wiki/.gif Tif (tiff) Bmp Png Filesize
Term Definition Tif (tiff) Tagged Image File Format (abbreviated TIFF) is a file format for storing images, including photographs and line art. As of 2009, it is under the control of Adobe Systems. ... en.wikipedia.org/wiki/TIF Bmp The BMP file format, sometimes called bitmap or DIB file format (for device-independent bitmap), is an image file format used to store bitmap digital images, especially on Microsoft Windows and OS/2 operating systems. en.wikipedia.org/wiki/.bmp Png Portable Network Graphics (PNG) is a bitmapped image format that employs lossless data compression. PNG was created to improve upon and replace GIF (Graphics Interchange Format) as an image-file format not requiring a patent license. It is or spelled out as P-N-G. ... en.wikipedia.org/wiki/.png Filesize Size of the image in bytes. To convert to kilobytes, divide by 1000. To convert to megabytes, divide by 1000000. www.dcresource.com/reviews/exif_key.html