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Image Processing: a DSP applic

消耗积分:5 | 格式:rar | 大小:1024 | 2010-07-06

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Introduction
An image isatwo-dimensionalsignalwhoseintensityatanypointisafunctionoftwospatial
variables[4].Wenote x and y thespatialcoordinatesand f (x,y) theimageintensityvalues.
Examples: photographs,stillvideoimages,radarimages,etc.
An imagesequence (e.g.television)isthree-dimensionalsignalsincetheimageintensityat
anypointisafunctionofthetwospatialonesandthetime.
Eachpictureelementor pixel representsacertainphysicalquantity.Forinstance,aphotograph
representstheluminancesofvariousobjectsasseenbythecamera.Butaninfraredimage
collectsthetemperatureprofilevaluesofascene.
Imageenhancement techniquesemphasizespecificimagefeaturestoimprovethevisualper-
ceptionofanimage.

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