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Image capture apparatus and zooming method

一种摄像设备、驱动方法的技术，应用在图像通信、电视、彩色电视的零部件等方向，能够解决经常变化、不能进行闪烁检测等问题

Active Publication Date: 2011-08-17
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Flicker detection may not be possible if the composition changes drastically
In particular, when zooming in by reading out a specific (sub)region, the composition often changes due to the influence of camera shake, and accurate flicker detection may not be possible

Method used

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  • Image capture apparatus and zooming method
  • Image capture apparatus and zooming method
  • Image capture apparatus and zooming method

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0014] figure 1 is a block diagram showing the configuration of an imaging apparatus according to an embodiment of the present invention. will refer to figure 1 The imaging apparatus 100 according to the embodiment of the present invention will be described.

[0015] refer to figure 1 , the light beam that has entered the imaging lens 111 forms an optical image on the image sensor 113 via the aperture 112 . The aperture 112 is driven based on a signal output from the aperture driving unit 142 . Under the control of the device control unit 133 in the system control unit 131 , the aperture driving unit 142 outputs the aperture driving amount to the aperture 112 .

[0016] The image sensor 113 is, for example, an X-Y address scanning type CMOS sensor that is driven based on a timing signal output from the timing generator 143 to photoelectrically convert an object image into an analog electrical signal. The timing generator 143 outputs a timing signal for controlling the ele...

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PUM

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Abstract

An image capture apparatus comprises an X-Y address scan type image sensor; a flicker detector configured to detect a flicker of a light source; a switch configured to switch the image sensor between a first state in which the image sensor is driven by a first driving method which comprises reading out a pixel signal within a range of a first angle of view and a second state in which the image sensor is driven by a second driving method which comprises reading out a pixel signal within a range of a second angle of view narrower than the first driving method; and a controller configured to control the switch so as to drive the image sensor by the first driving method while the flicker detector is detecting the flicker and to drive image sensor by the second driving method when the flicker detector has completed flicker detection.

Description

technical field [0001] The present invention relates to an imaging apparatus, and more particularly, to an imaging apparatus for capturing moving images. Background technique [0002] As conventionally known, when an image pickup device using a CCD or CMOS sensor shoots a moving image under a fluorescent lamp connected to a commercial power supply, since the fluorescent lamp flickers at the frequency of the commercial power supply, the brightness may vary for each frame, or Light / dark horizontal stripes may be produced in the frame. This light / dark change is called flicker. Flicker can be reduced by controlling the electronic shutter to a shutter speed of n / 100 seconds (n is a natural number) for 50 Hz flicker and n / 120 seconds for 60 Hz flicker. In order to obtain a shutter speed capable of reducing flicker and thereby reduce flicker, it is necessary to obtain the frequency of flicker. For example, Japanese Patent Laid-Open No. 2007-60585 discloses a method of integratin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/232H04N25/00H04N23/75
CPCH04N5/23296H04N5/2353H04N5/235H04N5/2357H04N23/70H04N23/69H04N23/745H04N23/73
Inventor 杉江和彦
Owner CANON KK
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