part_of feature detection 
Video is an ___MASK53___ ___MASK33___ for the recording , copying , playback , broadcasting , and display of moving visual media . In imaging ___MASK81___ , ___MASK43___ is processing of images using mathematical operations by using any form of signal processing for which the input is an image , a series of images , or a video , such as a photograph or video frame ; the output of ___MASK43___ ___MASK23___ be either an image or a set of characteristics or parameters related to the image . Most image - processing techniques involve treating the image as a two - dimensional signal and applying standard signal - processing techniques to it . Images are also processed as three - dimensional signals with the third - dimension being time or the z - axis . ___MASK31___ vision is an interdisciplinary field that deals with how computers can be made to gain high - level understanding from digital images or videos . From the perspective of engineering , it seeks to automate tasks that the human visual system can do . In ___MASK31___ vision and image processing the concept of feature detection refers to methods that aim at computing abstractions of image information and making local decisions at every image point whether there is an image feature of a given type at that point or not . The resulting features will be subsets of the image domain , often in the form of isolated points , continuous curves or connected regions . ___MASK66___ is the application of mathematics and scientific , economic , social , and practical knowledge in order to invent , innovate , design , build , maintain , research , and improve structures , machines , tools , systems , components , materials , processes , solutions , and organizations . Imaging ___MASK81___ is a multidisciplinary field concerned with the generation , collection , duplication , analysis , modification , and visualization of images , including imaging things that the ___MASK8___ ___MASK76___ cannot detect . As an evolving field it includes research and researchers from physics , mathematics , electrical engineering , ___MASK31___ vision , ___MASK7___ , and perceptual psychology . A photograph or photo is an image created by light falling on a light - sensitive surface , usually photographic ___MASK50___ or an electronic ___MASK33___ such as a CCD or a CMOS chip . Most photographs are created using a camera , which uses a lens to focus the scene ' s visible wavelengths of light into a reproduction of what the human ___MASK76___ would see . The process and practice of creating photographs is called photography . The word " photograph " was coined in 1839 by Sir John Herschel and is based on the Greek  (" phos "), meaning " light ", and  (" graphê "), meaning " drawing , writing ", together meaning " drawing with light ". Signal processing is an enabling ___MASK78___ that encompasses the fundamental theory , applications , algorithms , and implementations of processing or transferring information contained in many different physical , symbolic , or abstract formats broadly designated as " signals ". It uses mathematical , statistical , computational , heuristic , and linguistic representations , formalisms , and techniques for representation , modelling , analysis , synthesis , discovery , recovery , sensing , acquisition , extraction , ___MASK91___ , security , or forensics . A digital image is a numeric representation of ( normally binary ) a two - dimensional image . Depending on whether the image resolution is fixed , it ___MASK23___ be of vector or raster type . By itself , the term " digital image " usually refers to raster images or bitmapped images . A parameter ( from the Ancient Greek  , " para ": " beside ", " subsidiary "; and  , " metron ": " measure "), generally , is any characteristic that can help in defining or classifying a particular ___MASK92___ ( meaning an event , project , object , situation , etc .). That is , a parameter is an element of a ___MASK92___ that is useful , or critical , when identifying the ___MASK92___ , or when evaluating its performance , status , condition , etc .