Image analysis – Applications – 3-d or stereo imaging analysis
Patent
1995-06-07
1996-02-06
Boudreau, Leo
Image analysis
Applications
3-d or stereo imaging analysis
382168, 382318, G06K 900
Patent
active
054902223
ABSTRACT:
A video signal processing apparatus is obtainable which is capable of automatically and continuously adjusting variations of characteristics due to various factors after each video signal input system is adjusted. Histogram extracting circuits for extracting density histograms Ha and Hb of first and second video signals Va and Vb within a predetermined period of time on the basis of first and second quantized data Da and Db, a deviation amount computing device for computing the deviation amount of the distribution of the density histogram of the second video signal with respect to that of the first video signal, and a correcting device for correcting the second quantized data on the basis of the deviation amount are provided, so that the variations between the density of the characteristics of the first video signal and that of the second video signal due to the variation between the characteristics of the first video signal input system and those of the second video signal input system are absorbed and automatically corrected.
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patent: 4791678 (1988-12-01), Iwase et al.
patent: 4876726 (1989-10-01), Capello et al.
patent: 5060081 (1991-10-01), Shimura
patent: 5255330 (1993-10-01), Huynh et al.
Translation of Japanese Kokai No. 60-150183, published Aug. 1985.
Boudreau Leo
Johns Andrew W.
Mitsubishi Denki & Kabushiki Kaisha
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