Hello, We need to develop an image dewarping function. We have a working function to evaluate the distortion. What we need is a transfer function which maps P(x,y) to P'(x',y') based on a model of typical distortions of book scans.
We have experimented with following functions (polynom based), but they
need too many parameters:
ax + by + c fx + gy + h
x' = -----------, y' = -----------
1 + dx + ey 1 + dx + ey
If we have a look to typical book form, we think something similar to
this would be better:
b -cx
x' = ax e + d, with a~1, b~0.5, c~1, d~0
Do you have another suggestions? Do you have ideas to map y -> y'?
Thanks for your help...
Bye Andreas
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Andreas Romeyke
- Abteilung Blindenschrift -
Deutsche Zentralbücherei für Blinde zu Leipzig (DZB)
Gustav-Adolf-Straße 7, 04105 Leipzig
Tel: +49 341 7113-..., Fax: +49 341 7113-125
Internet: www.dzb.de
E-Mail: [email protected]
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