title: Digital contrast enhancement for online portal imaging.
abstract: Seven digital contrast enhancement algorithms were implemented and evaluated for application to images obtained with an online video portal imaging system. An objective quantitative comparison shows that superior contrast enhancement is obtained using histogram modification techniques. Additional tests made on an image of a humanoid phantom indicate that local (adaptive) histogram modification methods can produce a better contrast in detail than their global counterparts, if the original image is nonuniform in intensity.
authors.forename: K W
authors.initials: KW
authors.lastname: Leszczynski
authors.forename: S
authors.initials: S
authors.lastname: Shalev
mesh_terms: D000465:Algorithms; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D008961:Models, Structural; D009862:Online Systems; D011168:Portal System / Q000033:anatomy & histology*