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Checkerboard reference

A printed checkerboard with squares of 25 mm. Because the spacing of its corners is known, software can work out how a camera renders the world.

In the file

In PatternScan Pro it is needed once, for the calibration profile of a device, photographed from about twenty positions. It plays no part in digitizing itself, where the four reference tiles sit around the pattern piece instead.

Made-to-measure paper pattern on an atelier table with a dress form

Digitize sewing patterns without tracing.

Test PatternScan Pro free for 14 days with the full feature set. You need your smartphone, a printer and one pattern you always wanted digital.