JP2009038666A5 - - Google Patents

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JP2009038666A5
JP2009038666A5 JP2007202232A JP2007202232A JP2009038666A5 JP 2009038666 A5 JP2009038666 A5 JP 2009038666A5 JP 2007202232 A JP2007202232 A JP 2007202232A JP 2007202232 A JP2007202232 A JP 2007202232A JP 2009038666 A5 JP2009038666 A5 JP 2009038666A5
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flicker
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difference
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ＸＹアドレス方式の撮像素子により得られた画像信号のフリッカ成分を補正するフリッカ補正装置であって、
前記画像信号を、複数のフリッカ検出枠に分割する分割手段と、
前記複数のフリッカ検出枠の各々で、フリッカ成分を検出するフリッカ検出手段と、
前記フリッカ検出手段が検出したフリッカ成分を記憶する記憶手段と、
前記フリッカ検出手段が検出したフリッカ成分と、予め定めたフリッカ成分を表すフリッカモデルとから、前記画像信号に対するフリッカモデルを決定する決定手段と、
前記複数のフリッカ検出枠を、それぞれのフリッカ検出枠から検出されたフリッカ成分と前記フリッカモデルが表すフリッカ成分との差分に応じて分類する分類手段と、
前記記憶手段に記憶された、前記分類手段により前記差分が予め定めた値以上であると分類されたフリッカ検出枠のフリッカ成分を、前記分類手段により前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠のフリッカ成分を用いて生成した新たなフリッカ成分で置き換える制御手段と、
前記制御手段による置き換えが終了した後、前記記憶手段に記憶されたフリッカ成分から生成した補正値を用いて、前記画像信号のフリッカ成分を補正する補正手段とを有し、
前記分類手段は前記差分が前記予め定めた値以上であると分類されたフリッカ検出枠のフリッカ成分に対する判定処理を行い、
前記制御手段は前記判定処理の結果に応じて、複数の補間方法から１つを選択し、選択した補間方法にて前記新たなフリッカ成分を生成することを特徴とするフリッカ補正装置。 A flicker correction apparatus that corrects a flicker component of an image signal obtained by an XY address type image pickup device,
The image signal, dividing means for dividing into a plurality of flicker detection frames,
Flicker detection means for detecting a flicker component in each of the plurality of flicker detection frames;
Storage means for storing a flicker component detected by the flicker detection means;
Determining means for determining a flicker model for the image signal from a flicker component detected by the flicker detecting means and a flicker model representing a predetermined flicker component;
Classification means for classifying the plurality of flicker detection frames according to a difference between a flicker component detected from each flicker detection frame and a flicker component represented by the flicker model ;
The flicker component of the flicker detection frame that is stored in the storage unit and that is classified by the classification unit as having a difference that is greater than or equal to a predetermined value, and that the difference is smaller than the predetermined value by the classification unit. Control means for replacing with a new flicker component generated using the flicker component of the classified flicker detection frame;
After the replacement by the control unit is finished, by using the correction value generated from the stored flicker component in the storage means, it has a correction means for correcting the flicker component of the image signal,
The classification means performs a determination process on a flicker component of a flicker detection frame in which the difference is classified as the predetermined value or more,
The control means selects one of a plurality of interpolation methods according to the result of the determination process, and generates the new flicker component by the selected interpolation method . 前記補正手段は、前記分類手段により前記差分が前記予め定めた値以上であると分類されたフリッカ検出枠の割合が予め定められた閾値を超える画像信号については、フリッカ成分の補正を行わないことを特徴とする請求項１記載のフリッカ補正装置。 Said correcting means For the image signal that the difference exceeds the threshold value ratio is predetermined in the flicker detection frame which is classified as a predetermined value or more by the classifying means, to perform the correction of the flicker component It does go and flicker correction apparatus according to claim 1, wherein. 前記分類手段は、前記差分が前記予め定めた値以上であると分類されたフリッカ検出枠のうち連続するフリッカ検出枠からなる１つの領域を低信頼性領域として設定し、前記低信頼性領域の全周囲に前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠があるかを判定することを特徴とする請求項１又は請求項２記載のフリッカ補正装置。 Before SL classifying means sets one region of contiguous flicker detection frames of said flicker detection frame classified as difference the is predetermined value or more as a low reliability region, the low reliability areas 3. The flicker correction apparatus according to claim 1, wherein the flicker correction apparatus determines whether or not there is a flicker detection frame classified as having the difference smaller than the predetermined value around the entire circumference . 前記制御手段が、前記分類手段により全周囲に前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠があると判定された前記低信頼性領域に含まれるフリッカ検出枠のフリッカ成分を、当該低信頼性領域の周囲に存在する、前記分類手段により前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠のフリッカ成分を補間することによって生成することを特徴とする請求項３記載のフリッカ補正装置。 The flicker component of the flicker detection frame included in the low-reliability region in which the control unit has determined that there is a flicker detection frame that is classified as having the difference smaller than the predetermined value by the classification unit. Is generated by interpolating a flicker component of a flicker detection frame that exists around the low reliability region and is classified by the classification unit as having the difference smaller than the predetermined value. The flicker correction apparatus according to claim 3. 前記制御手段が、前記分類手段により全周囲に前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠があると判定されなかった前記低信頼性領域に含まれるフリッカ検出枠のフリッカ成分を、前記分類手段により前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠のフリッカ成分を外挿補間することによって生成することを特徴とする請求項３又は４に記載のフリッカ補正装置。 The control means does not determine that there is a flicker detection frame classified as having the difference smaller than the predetermined value around the entire circumference by the classification means. the components, by the classification means according to claim 3 or 4, characterized in that the difference is generated by extrapolating the flicker component of smaller and classified flicker detection frame than said predetermined value Flicker correction device. 前記分類手段は、前記差分が前記予め定めた値以上であると分類されたフリッカ検出枠のうち連続するフリッカ検出枠からなる１つの領域を低信頼性領域として設定し、前記画像信号における前記低信頼性領域のうち最大面積となる領域の大きさが予め定めた所定値よりも小さいか否かを判定することを特徴とする請求項１乃至５のいずれか１項に記載のフリッカ補正装置。The classifying unit sets one area composed of continuous flicker detection frames among the flicker detection frames classified as having the difference equal to or greater than the predetermined value as a low reliability region, and the low-frequency signal in the image signal. 6. The flicker correction apparatus according to claim 1, wherein it is determined whether or not the size of the maximum area of the reliability area is smaller than a predetermined value. 前記分類手段により前記画像信号における前記低信頼性領域のうち最大面積となる領域の大きさが前記予め定めた所定値よりも小さいと判定されなかった場合に、前記制御手段が、前記低信頼性領域に含まれるフリッカ検出枠のフリッカ成分を、前記分類手段により前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠が所定の個数以上連続している列及び行に含まれるフリッカ検出枠のフリッカ成分を補間することによって生成することを特徴とする請求項６記載のフリッカ補正装置。 When the classifying unit does not determine that the size of the maximum reliable region of the low-reliability region in the image signal is smaller than the predetermined value, the control unit includes the low-reliability The flicker components included in the flicker detection frames included in the region are included in columns and rows in which a predetermined number or more of flicker detection frames classified by the classifying unit as having the difference smaller than the predetermined value are continuous. The flicker correction apparatus according to claim 6 , wherein the flicker correction apparatus is generated by interpolating a flicker component of a detection frame. ＸＹアドレス方式の撮像素子により得られた画像信号のフリッカ成分を補正するフリッカ補正方法であって、
分割手段が前記画像信号を、複数のフリッカ検出枠に分割する工程と、
フリッカ検出手段が前記複数のフリッカ検出枠の各々で、フリッカ成分を検出する工程と、
記憶手段が前記フリッカ検出手段が検出したフリッカ成分を記憶手段に記憶する工程と、
決定手段が前記フリッカ検出手段が検出したフリッカ成分と、予め定めたフリッカ成分を表すフリッカモデルとから、前記画像信号に対するフリッカモデルを決定する工程と、
分類手段がそれぞれのフリッカ検出枠から検出されたフリッカ成分と前記フリッカモデルとの差分を求め、前記複数のフリッカ検出枠を前記差分が予め定めた値以上であるフリッカ検出枠と、前記差分が前記予め定めた値よりも小さいフリッカ検出枠に分類するとともに、前記差分が前記予め定めた値以上であると分類されたフリッカ検出枠のフリッカ成分に対する判定処理を行う工程と、
制御手段が前記判定処理の結果に応じて複数の補間方法から１つを選択し、前記記憶手段に記憶された前記差分が前記予め定めた値以上であると分類されたフリッカ検出枠のフリッカ成分を、前記差分が前記予め定めた値よりも小さいと分類されたフリッカ検出枠のフリッカ成分を用いて、選択された補間方法により生成した新たなフリッカ成分で置き換える工程と、
前記制御手段による置き換えが終了した後、補正手段が、前記記憶手段に記憶されたフリッカ成分から生成した補正値を用いて、前記画像信号のフリッカ成分を補正する工程とを有することを特徴とするフリッカ補正方法。 A flicker correction method for correcting a flicker component of an image signal obtained by an image pickup device of an XY address method ,
The dividing means is No. the image signal, and as engineering you divided into a plurality of flicker detection frames,
In each flicker detection means of the plurality of flicker detection frames, and as engineering you detect flicker components,
And as factories you stored in the storage unit flicker component storage means is detected by said flicker detection means,
A step of determining a flicker model for the image signal from a flicker component detected by the flicker detection unit and a flicker model representing a predetermined flicker component;
The classifying unit obtains a difference between the flicker component detected from each flicker detection frame and the flicker model, and the flicker detection frame in which the difference is equal to or greater than a predetermined value among the plurality of flicker detection frames ; Classifying the flicker detection frame smaller than a predetermined value and performing a determination process on the flicker component of the flicker detection frame classified as the difference being equal to or greater than the predetermined value ;
The control means selects one of a plurality of interpolation methods according to the result of the determination process, and the flicker component of the flicker detection frame classified as the difference stored in the storage means being equal to or greater than the predetermined value and, said difference with a flicker component of the flicker detection frame that is classified as less than the predetermined value, as the engineering of Ru replaced with new flicker component generated by the selected interpolation method,
After replacement by pre SL control means is completed, the correction means using the correction value generated from the stored flicker component in the storage means, to have a degree Engineering you correct the flicker component of the image signal A characteristic flicker correction method. コンピュータを、請求項１乃至請求項７のいずれか１項に記載のフリッカ補正装置の各手段として機能させるためのプログラム。 A program for causing a computer to function as each unit of the flicker correction apparatus according to any one of claims 1 to 7 .
JP2007202232A 2007-08-02 2007-08-02 Flicker correction apparatus and flicker correction method Expired - Fee Related JP4875564B2 (en)

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