Patent ID: 7468815

Claim:
An optical processing system, comprising: a photodetector array to obtain an image of light modulated by reflection off a data track defined on optical media, wherein the image comprises at least one framing mark and at least one data region; and a post-processor configured to: analyze the image and to recognize the at least one framing mark and data within the at least one data region; derive a scaling factor by measurement of at least one framing mark and comparing the measurement to dimensions of known framing marks; locate data within the image based on a direction from a location of a recognized framing mark and a distance based on the scaling factor, wherein a relative size and location of framing marks and data regions is predetermined; focus the image, if distortion of the recognized framing marks in the image is indicated by differences from an expected appearance of the framing marks, by repositioning lenses based on a function of the scaling factor; and read the located data from the image.