| |
 |
|
Class Information
Number: 250/201.7
Name: Radiant energy > Photocells; circuits and apparatus > Photocell controls its own optical systems > Automatic focus control > Based on contrast
Description: Subject matter in which the photo-cell generates signals used to create an image and adjustment of the focus is based on the degree of contrast in all or part of the image, i.e., on the ratio of the darkest and lightest portions of all or part of the image.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7454133 |
Solid-state image sensor and automatic-focus camera using the same |
Nov. 18, 2008 |
| 7433807 |
Facial image processing |
Oct. 7, 2008 |
| 7412159 |
Image pickup apparatus and defocus amount correction value calculation method |
Aug. 12, 2008 |
| 7405762 |
Camera having AF function |
Jul. 29, 2008 |
| 7403705 |
Camera device having automatic focusing function |
Jul. 22, 2008 |
| 7342608 |
Focus detecting method, focus detecting mechanism and image measuring device having focus detecting mechanism |
Mar. 11, 2008 |
| 7164108 |
Detection system for optical beam pointing and shaping |
Jan. 16, 2007 |
| 7132634 |
Distance measuring apparatus using passive AF sensor |
Nov. 7, 2006 |
| 7095904 |
Method and apparatus for determining best focus using dark-field imaging |
Aug. 22, 2006 |
| 6973264 |
Focal point detection apparatus, focusing system, camera, and focal point detection method |
Dec. 6, 2005 |
| 6927376 |
Autofocusing method for telescopes pertaining to surveying equipment |
Aug. 9, 2005 |
| 6677568 |
Surveying instrument having a phase-difference detection type focus detecting device |
Jan. 13, 2004 |
| 6580062 |
Contrast focus figure-of-merit method that is insensitive to scene illumination level |
Jun. 17, 2003 |
| 6487517 |
Target for photogrammetric analytical measurement system |
Nov. 26, 2002 |
| 6396873 |
Optical device |
May. 28, 2002 |
| 6376818 |
Microscopy imaging apparatus and method |
Apr. 23, 2002 |
| 6185053 |
Resolution adjusting device |
Feb. 6, 2001 |
| 6130417 |
Auto-focusing apparatus with hill-climbing and full-scanning auto-focusing performances |
Oct. 10, 2000 |
| 6128071 |
Range data recordation |
Oct. 3, 2000 |
| 6094537 |
Auto focus camera |
Jul. 25, 2000 |
| 6023056 |
Scene-based autofocus method |
Feb. 8, 2000 |
| 5939705 |
Image information detection system and optical equipment using the system |
Aug. 17, 1999 |
| 5900927 |
Variable target autofocusing and range finder for measuring distance to a subject |
May. 4, 1999 |
| 5886340 |
Multiple step automatic focusing apparatus for a surveying instrument |
Mar. 23, 1999 |
| 5870178 |
Distance measuring apparatus |
Feb. 9, 1999 |
| 5844231 |
Automatic focusing apparatus with plural light receiving devices for a surveying instrument |
Dec. 1, 1998 |
| 5825560 |
Optical apparatus |
Oct. 20, 1998 |
| 5808291 |
Image information detection system and optical equipment using the system |
Sep. 15, 1998 |
| 5773810 |
Method for generating real time degree of focus signal for handheld imaging device |
Jun. 30, 1998 |
| 5764290 |
Flange-back adjusting method and apparatus for a video camera using an inner focus lens assembly |
Jun. 9, 1998 |
| 5705803 |
Covariance focus sensor |
Jan. 6, 1998 |
| 5703677 |
Single lens range imaging method and apparatus |
Dec. 30, 1997 |
| 5648652 |
Optical focus evaluation and focus adjustment methods, focus evaluation and focus adjustment apparatus, and screen apparatus |
Jul. 15, 1997 |
| 5638122 |
Video camera apparatus and automatic focusing circuit |
Jun. 10, 1997 |
| 5604351 |
Process and apparatus for automatic analysis of elements in weak concentration on a support |
Feb. 18, 1997 |
| 5604344 |
Autofocussing microscope having a pattern imaging system |
Feb. 18, 1997 |
| 5597999 |
Auto focus detecting device comprising both phase-difference detecting and contrast detecting methods |
Jan. 28, 1997 |
| 5572011 |
Focus detecting method and distance measuring method with a plurality of light fluxes and a contrast operation |
Nov. 5, 1996 |
| 5561289 |
Device for detecting line of sight |
Oct. 1, 1996 |
| 5552594 |
Focus detecting system using a beam splitter to form an image at nominal best focus, slightly in front of best focus and slightly behind best focus |
Sep. 3, 1996 |
| 5471046 |
Camera auto-focusing system with designator using a volume holographic element |
Nov. 28, 1995 |
| 5448360 |
Three-dimensional image measuring device |
Sep. 5, 1995 |
| 5432331 |
Method and apparatus for detecting focus of moving images with tilted plane detector and time delay means |
Jul. 11, 1995 |
| 5432332 |
Method of auto-focussing and system therefor |
Jul. 11, 1995 |
| 5430288 |
Method and apparatus for setting the sharpness of an optical imaging system |
Jul. 4, 1995 |
| 5416609 |
Image pickup apparatus for focusing an object image based on mirror reflected height of the object |
May. 16, 1995 |
| 5406069 |
Optical apparatus with plural lenses and focus adjustment |
Apr. 11, 1995 |
| 5396058 |
Robust method for determining an imaging system focus error |
Mar. 7, 1995 |
| 5387789 |
Converging light beam focus detector using two equally and oppositely offset light beam spot size detectors |
Feb. 7, 1995 |
| 5381236 |
Optical sensor for imaging an object |
Jan. 10, 1995 |
|
|
|
