Edge detection using patterned background

Details Edge detection using patterned background Edge detection using patterned background

1990-08-01

1991-11-12

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358107, 358 93, 209900, 209586, H04N 700

Patent

active

050652370

ABSTRACT:
An apparatus for singulating mailpieces such as envelopes spread out on a moving conveyor belt includes a robot for picking up the mailpiece associated with a leading edge. The conveyor belt has alternate black-and-white longitudinal stripes. A TV camera views the belt surface, and produces video representing the stripes and any mailpieces. The video is processed to produce signals representative of the locations of transitions in the video along the centers of the black and/or white stripes. The location representative signals are processed by calculating lines corresponding to one or more leading edges of the mailpiece, which may then be used for controlling the robot in known manner.

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