[Talk-GB] OS 7th Series offset

Ed Avis eda at waniasset.com
Wed Oct 7 12:56:31 BST 2009


 <mapping at ...> writes:

>I am doing most of the image processing for the 7th series scans. I  
>want to stress again that it is a work in progress :)

>1) Polynomial-based image warp from the source image into a square  
>grid. This should get rid of any rotation of the map due to the  
>scanning process and any deformation of the paper.

Wouldn't an affine transformation be sufficient?  It seems unlikely that
the high-quality paper used for printing maps would distort or stretch.
(These map sheets have never been folded, I believe?)

Just curious,

-- 
Ed Avis <eda at waniasset.com>





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