Contrast enhancement for enlarged images based on edge sharpening

TitleContrast enhancement for enlarged images based on edge sharpening
Publication TypeConference Paper
Year of Publication2005
AuthorsWang, Q., R. Ward, and J. Zou
Conference NameImage Processing, 2005. ICIP 2005. IEEE International Conference on
PaginationII - 762-5
Date Publishedsep.
Keywordsadaptive contrast enhancement, blurring effect, digital image enlargement, edge sharpening, image enhancement, image restoration, sigmoidal functions

Blurring effect is among the major visual degradations resulting from digital image enlargement. We introduce a set of sigmoidal functions to sharpen edges of enlarged images. We show that these functions have properties that are especially desirable for sharpening expanded edges. We then develop an adaptive contrast enhancement scheme based on edge sharpening using these functions. It is shown that this scheme results in images of better contrast and natural-looking sharp edges.


a place of mind, The University of British Columbia

Electrical and Computer Engineering
2332 Main Mall
Vancouver, BC Canada V6T 1Z4
Tel +1.604.822.2872
Fax +1.604.822.5949

Emergency Procedures | Accessibility | Contact UBC | © Copyright 2021 The University of British Columbia