?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Computational+Approaches+to+Shape+Constancy&rft.creator=Edelman%2C+Shimon&rft.creator=Weinshall%2C+Daphna&rft.subject=Cognitive+Psychology&rft.description=The+appearance+of+a+three-dimensional+object+(that+is%2C+the+pattern+formed+by+its+projection+onto+the+retina+of+an+eye+or+onto+the+imaging+plane+of+a+camera)+depends+on+the+point+of+view+of+the+observer.+The+collective+human+awareness+of+this+dependence+is+attested+to+by+the+widespread+use+of+expressions+that+involve+the+metaphor+of+point+of+view%2C+in+languages+as+different+as+English%2C+Russian%2C+and+Hebrew.+Nevertheless%2C+as+far+as+recognition+is+concerned%2C+the+matters+of+viewpoint+seem+to+be+of+secondary+importance%3A+the+human+visual+system+exhibits+an+impressive+ability+to+recognize+a+familiar+object+viewed+from+an+unfamiliar+perspective.+This+phenomenon+has+been+termed+shape+constancy%2C+by+analogy+with+other+perceptual+constancies.++Computational+understanding+of+shape+constancy+can+be+gained+both+by+attempting+to+build+artificial+vision+systems+for+object+recognition%2C+and+by+modeling+human+performance+in+this+task.+Maintaining+a+constant+interpretation+of+the+three-dimensional+world+in+the+face+of+changing+viewing+conditions+has+long+been+a+major+goal+of+computer+vision.+The+first+part+of+this+chapter+classifies+and+reviews+several+approaches+to+3D+object+recognition+developed+within+this+field.+In+the+second+part+of+the+chapter%2C+we+list+the+central+characteristics+of+shape+constancy+in+human+vision%2C+and+compare+the+virtues+and+the+shortcomings+of+the+computational+approaches%2C+this+time+considered+as+models+of+human+performance.+We+conclude+with+a+general+discussion+of+the+phenomenon+of+shape+constancy+within+the+framework+of+the+computational+study+of+perception.&rft.publisher=Cambridge+University+Press%2C+eds.%2C+V+Walsh+and+J+Kulikowski&rft.date=1994&rft.type=Book+Chapter&rft.type=PeerReviewed&rft.format=application%2Fpostscript&rft.identifier=http%3A%2F%2Fcogprints.org%2F580%2F2%2F199711014.ps&rft.identifier=++Edelman%2C+Shimon+and+Weinshall%2C+Daphna++(1994)+Computational+Approaches+to+Shape+Constancy.++%5BBook+Chapter%5D+++++&rft.relation=http%3A%2F%2Fcogprints.org%2F580%2F