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Resources and References

Skew Removal

Grayscale De-skew Implementations

Binary De-skew Implementations

This is a (likely incomplete) list of binary de-skew developers. Other companies may incorporate their products on a licensing basis.

Mechanical De-Skew Implementations

Many of the leading scanner manufacturers quietly incorporate mechanical de-skew functions into their feeders and transports. Those specifically discussed in this white paper are listed here.

Skew Measurement from Image Data

As we note above, this technique is often computationally expensive and unnecessary, since working with the document's black border works so well. But it is interesting technically, so we include some references.

Three good surveys of image-based skew measurement papers exist.

A list of some of the relevant papers follows.

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