Method and system for processing image signals

Details Method and system for processing image signals Method and system for processing image signals

1982-12-08

1987-03-10

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

358 80, 101365, G06K 900

Patent

active

046495665

ABSTRACT:
In an image area measuring apparatus of the type wherein an image bearing surface of a lithographic printing plate is photographed with a television camera to produce an image signal, the image signal is converted into a digital signal to obtain a measured value and an image area of each one of a plurality of zones of the image bearing surface is determined by an arithmetic operation utilizing the measured value, the image signal is judged by the step of judging the image signal by taking the percentage of dot ratio of a predetermined constant value as a 100% dot ratio when the image bearing surface does not contain a portion corresponding to 100% dot ratio. Further the image signal is proofed by a method including the steps of obtaining a proof value corresponding to the measured value from a compensation table utilizing logarithmic functions by using a proof plate having a uniform light reflective index, determining a proof value for the measured value of the lithographic printing plate from the proof table, determining a difference between the proof value and the compensation value, and determining the image area from the difference.

REFERENCES:
patent: 3958509 (1976-05-01), Murray et al.
patent: 4149187 (1979-04-01), Palmer et al.
patent: 4402015 (1983-08-01), Yamada

Affiliated with

Also associated with

Rating

Method and system for processing image signals does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and system for processing image signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for processing image signals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1026111