TU-satellite image analysis and quality estimation

number: 
2250
English
Degree: 
Author: 
EsraaHussainAli
Supervisor: 
Dr.AliAbidDawoodAl-Zuky
year: 
2009

 TheimagequalityanalysistechniquesofTV-Satelliteimagescome fromthesignificantprocessingofhighimportanceofimageinformation inthemultimediaworld.Inthisresearch,thequalityofTV-Satellite
imagesonthethreesatellites(Arabsat,HotbirdandNilesat)wasstudied toestimatethebestqualityimage.Anumberofimagequalitymetrics havebeenintroduced.Theintroducedimagequalitymetricsconsistof
twomethods.Thefirstmethodiscalledthecontrastofimageedgesand the secondmethodiscalledthecrosscorrelation.Inthecontrastofimageedgesmethod,theedgeshavebeen
extractedfromtheimagebyapplyingSobeledgedetectorontheR,G,B andLcomponentsusingdifferentthresholdvalues.Theamount,the SNR,themeanandthestandarddeviationofimageedgeswere
calculatedforallR,G,BandLcomponents.Thecontrastofimageedges metric had been determined for different threshold values using Michelsonformula.TheMichelsoncontrastequationwasmodifiedin
differentwaystopresentnumberofcontrastapproachesthatappliedon theedgesoftheimage.