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photographyistheart,applicationandpracticeofcreatingdurableimagesbyphotographyistheart,applicationandpracticeofcreatingdurableimagesby recordinglightorotherelectromagneticradiation,eitherelectronicallybymeans ofanimagesensor,orchemicallybymeansofalight-sensitivematerialsuchas photographicfilm.Itisemployedinmanyfieldsofscience,manufacturing(e.g., photolithography),andbusiness,aswellasitsmoredirectusesforart,filmand videoproduction,recreationalpurposes,hobby,andmasscommunication.[ Typically,alensisusedtofocusthelightreflectedoremittedfromobjectsintoa realimageonthelight-sensitivesurfaceinsideacameraduringatimed exposure.Withanelectronicimagesensor,thisproducesanelectricalchargeat eachpixel,whichiselectronicallyprocessedandstoredinadigitalimagefilefor subsequentdisplayorprocessing.