Patent ID: 7023483
Filing Date: 2006-04-04
Classification: H04N

Abstract:
1. A method of capturing an object image of a document comprising placing the document on a flat horizontal surface, stably holding an image captive device relative to the document while the document is on the flat horizontal surface so the object image is in a field of view of an image sensor of the image capture device, projecting onto the document a plurality of structured optical patterns from the stably held image capture device while the document is on the flat horizontal surface so the patterns are aligned in register on the document, framing the object image in the field of view of the image sensor by adjusting the relative positions of the image sensor and the document on the flat horizontal surface, the position adjustment being performed by responding to the structured optical projected images and then capturing, with the sensor, the object image on the document while the object image is framed, wherein the object image capturing step includes capturing first and second object images having different first and second predetermined areas, positioning the image sensor at first and second different ranges while the first and second object images are respectively captured so the field of view of the image sensor remains fixed during capturing of the first and second object images, the image sensor being positioned at the first and second ranges by performing, at the first and second ranges, the holding, projecting and framing steps.