Document identifier for special ticket e.g. for image processor and copier

摘要

The document identifier recognises a special ticket which comprises a printed part where a given expression is made by printing, and a background part contg. no printed expression. The shape of the peripheral part of the image or the background, especially of peripheral part of the background is recognised, and the document is judged to be a special ticket.The document image also has an outer frame part having a given shape at its periphery, and the judgement is made based on the result of the measurement of the width of the outer frame. The width of the outer frame part is related to the direction orthogonal to the outline of the document image