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Flicker reduction method, flicker reduction circuit and image pickup apparatus

一种计算装置、成像元件的技术，应用在图像拾取装置,闪烁减少电路领域，能够解决图像质量下降等问题，达到防止图像质量下降、减少错误校正的效果

Inactive Publication Date: 2007-03-14
SONY CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In other words, causing serious degradation in image quality

Method used

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  • Flicker reduction method, flicker reduction circuit and image pickup apparatus
  • Flicker reduction method, flicker reduction circuit and image pickup apparatus
  • Flicker reduction method, flicker reduction circuit and image pickup apparatus

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Embodiment Construction

[0035] Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is by no means limited to the embodiments described below, and these embodiments can be modified and changed in various ways without departing from the spirit and principle of the present invention.

[0036] For example, the present invention is applicable to an image pickup device having the structure shown in FIG. 1 .

[0037] Referring to FIG. 1 , an image pickup device 10 is a video camera realized by using an XY address scanning type imaging element, which is a CMOS imaging element 12 . The image pickup device 10 includes an imaging optical system 11 , a CMOS imaging element 12 , an analog signal processing section 13 , a system controller 14 , a lens driving driver 15 , a timing generator 16 and a digital signal processing section 17 .

[0038] In this image pickup device 10 , light from a subj...

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Abstract

It is now possible to correct flicker without the risk of correcting flicker by error if a moving subject exists in the scene by using values detected in the past in order to prevent degradation of image quality from taking place. The integral value obtained by integrating an input video signal that includes a flicker component over not less than a horizontal period and the difference value between integral values of adjacent fields or frames is normalized. Then, the amplitude component and the phase component of the flicker component are estimated. A flicker coefficient for canceling the amplitude component and the phase component of the flicker component estimated is generated on the basis of the probability of being under the lighting of a fluorescent lamp. The flicker coefficient and the input video signal are computationally determined to obtain a video signal with a reduced flicker component.

Description

[0001] Cross References to Related Applications [0002] The present invention contains subject matter related to Japanese Patent Application No. 2005-261095 filed in the Japan Patent Office on Sep. 8, 2005, the entire content of which is hereby incorporated by reference. technical field [0003] The present invention relates to a flicker reducing method and a flicker reducing circuit applied to an image pickup device such as a video camera or a digital camera under fluorescent lighting, the image pickup device comprising a CMOS (Complementary Metal Oxide Semiconductor ) XY address scanning type imaging element (imager, imaging sensor) of the imaging element, and the present invention also relates to an image pickup device suitable for using the method and circuit. Background technique [0004] When taking an image of a subject with a camera under the direct light of a fluorescent lamp powered by a commercial AC power supply, due to the difference between the brightness chan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/243
CPCH04N5/2357H04N5/235H04N23/745H04N23/70H04N25/60H04N25/76
Inventor 野村博文伊东真博
Owner SONY CORP