JP2014165800A5 - - Google Patents
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- JP2014165800A5 JP2014165800A5 JP2013036909A JP2013036909A JP2014165800A5 JP 2014165800 A5 JP2014165800 A5 JP 2014165800A5 JP 2013036909 A JP2013036909 A JP 2013036909A JP 2013036909 A JP2013036909 A JP 2013036909A JP 2014165800 A5 JP2014165800 A5 JP 2014165800A5
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- 238000001514 detection method Methods 0.000 claims description 29
- 238000005286 illumination Methods 0.000 claims description 27
- 230000003287 optical Effects 0.000 claims description 16
- 238000009825 accumulation Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 238000005070 sampling Methods 0.000 claims 1
Description
上記の目的を達成するため、本発明によるフリッカ検出装置は、光学像が結像されて、該光学像を光電変換する撮像素子から出力される画像信号で生じるフリッカを検出するフリッカ検出装置であって、予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出手段とを有し、前記フリッカ検出手段は、前記フリッカの周波数と前記基準周波数との誤差に応じて前記基準周波数を変更して、変更後の基準周波数に応じて前記周波数解析処理を行うことを特徴とする。 In order to achieve the above object, a flicker detection apparatus according to the present invention is a flicker detection apparatus that detects flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image. Te, and a flicker detection means for detecting the illumination intensity change information indicating a change in illumination intensity in the image signal the image signal by frequency analysis processing according to the reference frequency predetermined as a flicker, the flicker detection The means is characterized in that the reference frequency is changed according to an error between the flicker frequency and the reference frequency, and the frequency analysis processing is performed according to the changed reference frequency.
本発明によるフリッカ補正装置は、光学像が結像されて、該光学像を光電変換する撮像素子から出力される画像信号で生じるフリッカを検出して補正するフリッカ補正装置であって、予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出手段と、前記照明強度変化情報および前記フリッカの周波数と前記基準周波数との誤差に基づいて前記フリッカ補正をするためのフリッカ補正値を生成するフリッカ補正値生成手段と、前記フリッカ補正値に基づいて前記画像信号に生じたフリッカの補正を行うフリッカ補正手段とを有することを特徴とする。 A flicker correction apparatus according to the present invention is a flicker correction apparatus that detects and corrects flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image, and is predetermined. Flicker detection means for detecting, as flicker, illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing on the image signal according to the reference frequency, and the illumination intensity change information and the flicker frequency Flicker correction value generation means for generating a flicker correction value for performing the flicker correction based on an error from the reference frequency, and flicker correction means for correcting flicker generated in the image signal based on the flicker correction value. It is characterized by having.
Claims (18)
予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出手段とを有し、
前記フリッカ検出手段は、前記フリッカの周波数と前記基準周波数との誤差に応じて前記基準周波数を変更して、変更後の基準周波数に応じて前記周波数解析処理を行うことを特徴とするフリッカ検出装置。 A flicker detection apparatus that detects flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image,
And a flicker detection means for detecting a flicker illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing the image signal according to a predetermined reference frequency,
The flicker detection unit changes the reference frequency according to an error between the flicker frequency and the reference frequency, and performs the frequency analysis processing according to the changed reference frequency. .
予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出手段と、
前記照明強度変化情報および前記フリッカの周波数と前記基準周波数との誤差に基づいて前記フリッカ補正をするためのフリッカ補正値を生成するフリッカ補正値生成手段と、
前記フリッカ補正値に基づいて前記画像信号に生じたフリッカの補正を行うフリッカ補正手段と、
を有することを特徴とするフリッカ補正装置。 A flicker correction apparatus that detects and corrects flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image,
Flicker detection means for detecting, as flicker, illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing on the image signal according to a predetermined reference frequency ;
Flicker correction value generation means for generating a flicker correction value for performing the flicker correction based on the illumination intensity change information and an error between the flicker frequency and the reference frequency ;
Flicker correction means for correcting flicker generated in the image signal based on the flicker correction value;
A flicker correction device comprising:
前記誤差推定手段は、前記位相情報に応じて単位時間当たりの位相の変化量によって前記誤差周波数を推定することを特徴とする請求項１３に記載のフリッカ補正装置。 The illumination intensity change information is phase information of frequency components obtained by the frequency analysis process,
The flicker correction apparatus according to claim 13 , wherein the error estimation unit estimates the error frequency based on a phase change amount per unit time according to the phase information.
予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出ステップと、
前記フリッカの周波数と前記基準周波数との誤差に応じて前記基準周波数を変更して、変更後の基準周波数に応じて前記周波数解析処理を前記フリッカ検出ステップで行わせる変更ステップと、
を有することを特徴とする制御方法。 A control method of a flicker detection apparatus for detecting flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image,
A flicker detection step of detecting, as flicker, illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing on the image signal according to a predetermined reference frequency ;
Changing the reference frequency according to an error between the flicker frequency and the reference frequency, and changing the frequency analysis processing according to the changed reference frequency in the flicker detection step;
A control method characterized by comprising:
前記フリッカ検出装置が備えるコンピュータに、
予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出ステップと、
前記フリッカの周波数と前記基準周波数との誤差に応じて前記基準周波数を変更して、変更後の基準周波数に応じて前記周波数解析処理を前記フリッカ検出ステップで行わせる変更ステップと、
を実行させることを特徴とする制御プログラム。 A control program used in a flicker detection apparatus for detecting flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image,
In the computer provided in the flicker detection device,
A flicker detection step of detecting, as flicker, illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing on the image signal according to a predetermined reference frequency ;
Changing the reference frequency according to an error between the flicker frequency and the reference frequency, and changing the frequency analysis processing according to the changed reference frequency in the flicker detection step;
A control program characterized by causing
予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出ステップと、
前記照明強度変化情報および前記フリッカの周波数と前記基準周波数との誤差に基づいて前記フリッカ補正をするためのフリッカ補正値を生成するフリッカ補正値生成ステップと、
前記フリッカ補正値に基づいて前記画像信号に生じたフリッカの補正を行うフリッカ補正ステップと、
を有することを特徴とする制御方法。 A control method of a flicker correction device that detects and corrects flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image,
A flicker detection step of detecting, as flicker, illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing on the image signal according to a predetermined reference frequency ;
A flicker correction value generating step for generating a flicker correction value for performing the flicker correction based on the illumination intensity change information and an error between the flicker frequency and the reference frequency ;
A flicker correction step for correcting flicker generated in the image signal based on the flicker correction value;
A control method characterized by comprising:
前記フリッカ補正装置が備えるコンピュータに、
予め定められた基準周波数に応じて前記画像信号を周波数解析処理して前記画像信号における照明強度の変化を示す照明強度変化情報をフリッカとして検出するフリッカ検出ステップと、
前記照明強度変化情報および前記フリッカの周波数と前記基準周波数との誤差に基づいて前記フリッカ補正をするためのフリッカ補正値を生成するフリッカ補正値生成ステップと、
前記フリッカ補正値に基づいて前記画像信号に生じたフリッカの補正を行うフリッカ補正ステップと、
を実行させることを特徴とする制御プログラム。 A control method used in a flicker correction apparatus for detecting and correcting flicker generated in an image signal output from an image sensor that photoelectrically converts an optical image formed on an optical image,
In the computer provided in the flicker correction device,
A flicker detection step of detecting, as flicker, illumination intensity change information indicating a change in illumination intensity in the image signal by performing frequency analysis processing on the image signal according to a predetermined reference frequency ;
A flicker correction value generating step for generating a flicker correction value for performing the flicker correction based on the illumination intensity change information and an error between the flicker frequency and the reference frequency ;
A flicker correction step for correcting flicker generated in the image signal based on the flicker correction value;
A control program characterized by causing
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| JP2013036909A JP6100023B2 (en) | 2013-02-27 | 2013-02-27 | Flicker detection device, flicker correction device, control method thereof, and control program |
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| JP2013036909A JP6100023B2 (en) | 2013-02-27 | 2013-02-27 | Flicker detection device, flicker correction device, control method thereof, and control program |
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| JP2014165800A JP2014165800A (en) | 2014-09-08 |
| JP2014165800A5 true JP2014165800A5 (en) | 2016-04-14 |
| JP6100023B2 JP6100023B2 (en) | 2017-03-22 |
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| JP6482370B2 (en) * | 2015-05-08 | 2019-03-13 | キヤノン株式会社 | Imaging device, light amount change detection method and program |
| JP6304605B2 (en) * | 2015-11-12 | 2018-04-04 | カシオ計算機株式会社 | Imaging apparatus, flicker detection method, and program |
| US10848684B2 (en) * | 2016-08-16 | 2020-11-24 | Sony Corporation | Imaging control device, imaging control method, and imaging system |
| CN114616444A (en) | 2019-11-07 | 2022-06-10 | 柯尼卡美能达株式会社 | Flicker measurement device and measurement method |
| CN112351216B (en) * | 2020-10-10 | 2022-04-05 | 深圳开阳电子股份有限公司 | Method for detecting and eliminating video flicker and image processing device |
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| US7502054B2 (en) * | 2004-12-20 | 2009-03-10 | Pixim, Inc. | Automatic detection of fluorescent flicker in video images |
| JP5625371B2 (en) * | 2010-01-29 | 2014-11-19 | ソニー株式会社 | Image processing apparatus, signal processing method, and program |
| JP5383886B2 (en) * | 2012-10-05 | 2014-01-08 | キヤノン株式会社 | Image processing apparatus, image processing method, program, and storage medium |
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