Electronic parallel raster dual image registration device

Details Electronic parallel raster dual image registration device Electronic parallel raster dual image registration device

1991-12-11

1993-10-26

Razavi, Michael T.

Image analysis

Histogram processing

For setting a threshold

382 45, 382 46, 395138, G06K 932

Patent

active

052573257

ABSTRACT:
An apparatus and method electronically registers or aligns ideal raster data to real raster data for subsequent processes such as inspection systems and image processing systems. The electronic image registration system receives ideal and real images in scrolling buffers wide enough to hold the width of the image and high enough to hold the difference in a skewed image. In other words, the real and ideal upper corners must be contained within the buffers for any possible kind of misalignment or distortion. Each buffer has a selector to randomly access frames of image in the vertical direction. Each buffer image frame is moved horizontally out of its lower swath and into its new position in the next upper swath. Horizontal movement of each buffer is independent, such that adjustable sequential access in the horizontal direction is available. The real image stream buffer selector addressing and clocking are held fixed during the registration phase, while the ideal image stream buffer selector address and clocking are in constant adjustment.

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