DIGITAL RESTORATION OF BLURRED PHOTOGRAPHS

Authors
  1. Boulter, J.F.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
The amount of information that a human observer can obtain from a blurred photograph can be increased by post-processing the image in a digital computer. A complete procedure for restoring (by Wiener filtering) high-resolution photographs degraded by several common types of blurs is described. The practical aspects of obtaining an acceptable restoration are considered in detail. These include the limitations of the Wiener filter, the characteristics of photographic film and methods to identify the blur by analysing the blurred image using only limited a priori knowledge. High-resolution photographs degraded by motion and focus blurs introduced directly in a camera are restored to illustrate the techniques.
Report Number
DREV-4107/78 —
Date of publication
15 Feb 1978
Number of Pages
64
DSTKIM No
78-01034
CANDIS No
81746
Format(s):
Hardcopy;Originator's fiche received by DSIS

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