Automatic optimization of photographic exposure parameters throu

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

354413, 354414, 354420, 354432, 354443, 354441, 3541491, G03B 7097, G03B 716, G03B 1503

Patent

active

050499165

ABSTRACT:
Exposure control apparatus and methods for use in a photographic camera to improve the overall quality of photographed images over that obtainable by adherence to ISO/ANSI exposure standards. The quality improvement is attained through automatic selection of photographic exposure parameters primarily based upon scene requirements (including providing sufficient depth-of-field and avoiding image blur) and film exposure characteristics, rather than through use of the ISO/ANSI exposure standards. Specifically, the present invention: (a) determines the initial exposure settings, e.g. shutter speed and lens aperture size and, where appropriate, flash parameters, necessary to provide a baseline, typically an ISO normal exposure of a scene to be photographed; (b) ascertains corresponding exposure settings (and, where appropriate, flash parameters) that actually meet the scene requirements, such as e.g. camera shake and required depth-of-field; (c) assesses, in response to differences between the initial and corresponding exposure settings, whether any extra system speed exists and, if so, the amount of extra system which is available for use in photographing the scene; and (d) finally, where possible, properly utilizes that extra system speed in a pre-defined prioritized incremental manner to vary the baseline exposure settings (and, where appropriate, flash parameters) in order to provide an exposure of the scene that produces the desired level of image quality. As such, the invention deviates from the ISO/ANSI exposure standards where necessary to improve image quality beyond that which would result from adherence to these standards. Ambient, fill and full flash lighting conditions are all advantageously accommodated.

REFERENCES:
patent: 3843255 (1974-10-01), Cole
patent: 3888580 (1975-06-01), Amano et al.
patent: 3917395 (1975-11-01), Ogawa
patent: 4092067 (1978-05-01), Grossmann
patent: 4100424 (1978-07-01), Akimoto et al.
patent: 4101216 (1978-07-01), Grossman
patent: 4103307 (1978-07-01), Shinoda et al.
patent: 4154523 (1979-05-01), Rising et al.
patent: 4168120 (1979-09-01), Freier et al.
patent: 4182560 (1980-01-01), Oguchi et al.
patent: 4279505 (1981-07-01), Ursprung et al.
patent: 4309089 (1982-01-01), Harvey
patent: 4339517 (1982-07-01), Akimoto
patent: 4345825 (1982-08-01), Matteson et al.
patent: 4429969 (1984-02-01), Saegusa
patent: 4598986 (1986-07-01), Shiratori et al.
patent: 4769666 (1988-09-01), Kumakura
patent: 4772910 (1988-09-01), Fields
patent: 4785323 (1988-11-01), Bell
patent: 4801964 (1989-01-01), Desormeaux
patent: 4812872 (1989-03-01), Desormeaux
D. M. Zwick, "The Technical Basis of Photographic Speed Determination, or What is a Normal Exposure?", SMPTE Journal, Aug. 1979, vol. 88, No. 8, pp. 533-537.
"American National Standard for General--Purpose Photographic Exposure Meters (Photoelectric Type) ANSI PH 3.49--1971", American National Standards Institure, 1971.
"American National Standard for Colour Negative Films for Still Photography--Determination of ISO Speed ANSI PH 2.27--1988", American National Standards Institute, 1988.
"American National Standard for Photography--Photographic Exposure Guide ANSI 2.7--1986", American National Standards Institute, 1986.
L. Stroebel et al., Photographic Materials and Processes (.COPYRGT.1986: Focal Press; Boston, Mass.), specifically pp. 42-56.

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

Automatic optimization of photographic exposure parameters throu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic optimization of photographic exposure parameters throu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic optimization of photographic exposure parameters throu will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1920082

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