SVS-VISTEK
Feature description
47
Figure 17: Illustration of a defect pixel
6.2.18
Shading Correction
The interactions between objects, illumination, and the camera lens might
lead to a non-uniform flatfield in brightness. Shading describes the non-
uniformity of brightness from one edge to the other or center towards
edge(s).
This shading can be caused by non-uniform illumination, non-uniform
camera sensitivity, vignetting of the lens, or even dirt and dust on glass
surfaces (lens).
Shading correction is a procedure to create a flatfield image out of a
non-uniform image regardless of the reasons of the non-uniformity.
Before doing shading correction, make sure your lens is clean and in
perfect condition. If the lens is not clean or the lighting not uniform, the
algorithm tries to compensate these as well – resulting in a wrong shading
table and visible artifacts, loss of details or local noise in the final image.
Figure 18: Original and shading corrected image
Summary of Contents for HR Series
Page 1: ...2 06 2019 Manual HR Camera Link hr25 hr29 hr43 hr120 ...
Page 5: ...SVS VISTEK Safety Messages Contents of Camera Set 5 ...
Page 14: ...SVS VISTEK Connectors 14 ...
Page 64: ...SVS VISTEK Feature description 64 will reflect as following ...
Page 85: ...SVS VISTEK Dimensions 85 8 1 hr25 CL ...
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Page 91: ...SVS VISTEK Dimensions 91 8 3 hr43 CL ...
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