JP2008107565A5

JP2008107565A5 -

Info

Publication number: JP2008107565A5
Application number: JP2006290263A
Authority: JP
Filing date: 2006-10-25
Publication date: 2009-11-19
Anticipated expiration: 2026-10-25

Claims

First detection means for detecting the luminance of the first region corresponding to the imaging range;
The search of a proper brightness from a first detected by the detecting means luminance, as the proper luminance is obtained, and automatic exposure control means for controlling the exposure value,
Second detection means for detecting a luminance of a second region that includes the first region and is wider than the first region;
From the luminance of the second detected by the detecting means that said second region, the change in luminance per unit time in at least a partial area of the shooting near range surrounding the first region in the second region a peripheral luminance variation detection means for detecting a surrounding luminance variation is the amount,
When the surrounding luminance variation is equal to or greater than the peripheral threshold, the so automatic exposure control means for a predetermined time fixed the previous SL exposure value, an exposure fixing control means for performing exposure fixed control,
An imaging apparatus comprising:

Inner luminance for detecting an inner luminance change amount which is a luminance change amount per unit time in at least a part of the first region from the luminance of the first region detected by the first detection unit. Change detection means;
If the inner luminance variation is equal to or greater than the inner threshold, or if the exposed fixed control means determines that the predetermined time has elapsed from the start of fixing the exposure value, said automatic exposure control means the Exposure fixation releasing means for releasing the exposure fixation control so as to control the exposure value again ;
The imaging apparatus according to claim 1, further comprising:

Zoom amount detecting means for detecting a zoom amount in the imaging device;
Based on the zoom amount detected by the zoom amount detecting means, and determining means for determining the predetermined time,
Further comprising a,
The imaging apparatus according to claim 1 or 2, wherein the determination unit determines that the fixed time is shorter as the zoom amount detected by the zoom amount detection unit is larger. .

The imaging apparatus according to claim 3, wherein the zoom amount detection means detects either a zoom amount in the light condensing means or an electronic zoom amount in the digital signal processing means.

It said second detection means detects the respective brightness of the plurality of divided areas which the second region is divided,
The surrounding luminance change amount detecting means detects the amount of change in luminance in each of the plurality of divided areas corresponding to the photographing peripheral range from the luminance of the plurality of divided areas detected by the second detecting means ,
The exposed fixed control means, if it is determined that the change amount of the luminance in the at least one split area, out of the photographing around the range into a plurality of divided areas corresponding value is equal to or larger than the peripheral threshold, performing the exposure fixed control The imaging device according to any one of claims 1 to 4, wherein:

A first detection step in which the first detection means detects the luminance of the first region corresponding to the imaging range;
An automatic exposure control means for obtaining an appropriate brightness from the brightness detected in the first detection step and controlling an exposure value so as to obtain the appropriate brightness ; and
A second detection step in which a second detection means detects the luminance of a second region that includes the first region and is wider than the first region;
At least a part of the photographing peripheral range surrounding the first region in the second region from the luminance of the second region detected by the second detection step by the peripheral luminance change amount detection means a peripheral luminance variation detection step of detecting the peripheral brightness variation is a change amount of the luminance per unit time in,
A determination step of determining whether or not the exposure fixing control means has a peripheral luminance change amount equal to or greater than a peripheral threshold;
Exposure fixed control means, wherein if the peripheral luminance variation is determined in the determination step to be equal to or larger than the peripheral threshold, the exposure value to secure a certain time by the automatic exposure control step, performing exposure fixed control Exposure fixing control step;
An exposure control method for an imaging apparatus, comprising:

A zoom amount detecting step in which the zoom amount detecting means detects the zoom amount in the light collecting means;
Determining means, from the zoom amount detected by the zoom amount detection step, by predicting a time the object passes through the first region, and determining step of determining the predetermined time,
The exposure control method for an imaging apparatus according to claim 6, further comprising: