A Fast Algorithm for Enhancement of Photographic Images TOEFL

Author(s):

Quardt, Dennis; Reid-Green, Keith S.

Publication Year:

1992

Report Number:

RM-92-08

Source:

ETS Research Memorandum

Document Type:

Report

Page Count:

13

Subject/Key Words:

Image Processing, Photographs, Test Security, Test of English as a Foreign Language (TOEFL)

Abstract

Photographs vary widely in technical quality. Pictures provided by amateur photographers for identification purposes may be color or black-and-white, printed on glossy or matte paper, damaged by sunlight or otherwise stained, or improperly exposed. The use of such photographs in an image-processing system mandates normalization of brightness and contrast in order that the resulting copies, produced on a laser printer, can be used to recognize the subject of the photograph. In a batch environment, it is also necessary that photo processing be completed in a short period of time. This paper describes a sub-second photograph-processing algorithm.

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