Apparatus for taking measurements for the evaluation of video ca

Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

250571, 235 92MP, 358101, 364830, H04N 718

Patent

active

043674879

ABSTRACT:
Apparatus for evaluating optoelectronically generated picture rasters wherein, for the purpose of regulating the tape movement of a tape-shaped material (tape), the tape position is detected with the aid of a video camera by continuously reproducing an edge of the tape or a marking line on the tape as a sudden change in contrast, each picture raster or frame is scanned line-by-line for the purpose of evaluation and the picture elements in each line occurring up to the selected sudden change in contrast are counted by means of a picture element counter, and the count is used to provide an analog output signal, by means of a digital/analog converter, which is used to form a setting instruction to mechanically adjust the tape position to the desired position. The input signal to the digital/analog converter is provided by the output of a second counter which serves as a memory having a counting content of picture elements corresponding to the previously detected tape position. The input of this second counter is connected, via a precounter, to a digital comparator whose two inputs are connected with the outputs of the first and second counters. The digital comparator and the precounter are designed such that the precounter is advanced or set back by one counting pulse whenever the number of picture elements counted in one line of the picture raster until the occurrence of a sudden change in contrast is greater or smaller, respectively, than the number of picture elements stored in the second counter, and the precounter emits a signal which changes the counting content of the second counter by plus or minus one, and the precounter is returned to the starting state, if its counting content reaches a given value by algebraic addition of its input signals. An analog version and a modified digital version are also disclosed.

REFERENCES:
patent: 3219894 (1965-11-01), Rosch
patent: 3261967 (1966-07-01), Rosin
patent: 4188544 (1980-02-01), Chasson
Sensor Review, vol. 1, No. 2, (Apr. 1981), P. Loose, "Finding the Edge on Steel with Stereoscopic Vision", pp. 60-65.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus for taking measurements for the evaluation of video ca does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for taking measurements for the evaluation of video ca, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for taking measurements for the evaluation of video ca will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1584278

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.