JP2001045515A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2001045515A5 JP2001045515A5 JP1999217378A JP21737899A JP2001045515A5 JP 2001045515 A5 JP2001045515 A5 JP 2001045515A5 JP 1999217378 A JP1999217378 A JP 1999217378A JP 21737899 A JP21737899 A JP 21737899A JP 2001045515 A5 JP2001045515 A5 JP 2001045515A5
- Authority
- JP
- Japan
- Prior art keywords
- value
- white balance
- color component
- adjustment
- image information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000003287 optical effect Effects 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000012935 Averaging Methods 0.000 claims description 2
- 238000013459 approach Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 claims 6
- 239000003086 colorant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
Description
【００１４】
【課題を解決するための手段】
請求項１記載の発明は、撮像対象となる光像を少なくとも３色の色フィルタを介して各色成分毎の画像情報に光電変換する撮像素子と、この撮像素子で得た画像情報における各色成分の値を求める第１の演算手段と、この第１の演算手段で求めた各色成分の値を用い、各色成分の値が等しくなるようなホワイトバランスの調整値を算出する第２の演算手段と、前記第２の演算手段により算出されたホワイトバランスの調整値に達するまでの間、各色成分に対するゲインを徐々に増減させる第１の調整手段と、所定の条件である場合は、前記第２の演算手段により算出されたホワイトバランスの調整値となるように、各色成分に対するゲインを直ちに調整する第２の調整手段とを具備したことを特徴とする。
0014.
[Means for solving problems]
The invention according to claim 1 is an image pickup device that photoelectrically converts an optical image to be imaged into image information for each color component through a color filter of at least three colors, and each color component in the image information obtained by this image pickup device . A first calculation means for obtaining a value , a second calculation means for calculating a white balance adjustment value such that the values of the color components are equal to each other using the values of each color component obtained by the first calculation means, and a second calculation means. The first adjustment means for gradually increasing or decreasing the gain for each color component until the white balance adjustment value calculated by the second calculation means is reached, and the second calculation if predetermined conditions are met. It is characterized by providing a second adjusting means for immediately adjusting the gain for each color component so that the white balance adjustment value calculated by the means is obtained.
請求項２記載の発明は、上記請求項１記載の発明において、前記第１の演算手段は、各色成分毎に前記画像情報を平均することによって前記各色成分の値を求め、前記第２の演算手段は、最も輝度信号に近い色成分の値を基準とし、他の色成分の値がこの基準となる色成分の値に等しくなるようなホワイトバランスの調整値を算出し、前記第１の調整手段および前記第２の調整手段は、前記他の色成分に対するゲインを調整することを特徴とする。 The invention according to claim 2 is the invention according to claim 1, wherein the first calculation means obtains the value of each color component by averaging the image information for each color component, and the second calculation. The means is based on the value of the color component closest to the brightness signal, calculates the white balance adjustment value so that the value of the other color component becomes equal to the value of the reference color component, and obtains the first adjustment. The means and the second adjusting means are characterized in that the gain with respect to the other color components is adjusted.
請求項３記載の発明は、上記請求項１または２記載の発明において、前記第１の調整手段は、前記ホワイトバランスの調整値に達するまでの間、各色成分に対するゲインを所定値づつ徐々に増減させることを特徴とする。 The invention according to claim 3 is the invention according to claim 1 or 2 , wherein the first adjusting means gradually increases or decreases the gain for each color component by a predetermined value until the white balance adjustment value is reached. It is characterized by letting it.
請求項４記載の発明は、上記請求項１または２記載の発明において、前記第１の調整手段は、各色成分に対するゲインが前記ホワイトバランスの調整値に近づくに従って前記増減の幅が徐々に小さくなるように制御することを特徴とする。 The invention according to claim 4 is the invention according to claim 1 or 2, wherein the first adjusting means gradually reduces the range of increase / decrease as the gain for each color component approaches the adjusting value of the white balance. It is characterized in that it is controlled in such a manner.
請求項５記載の発明は、撮像対象となる光像を少なくとも３色の色フィルタを介して各色成分毎の画像情報に光電変換する撮像素子と、この撮像素子で得た画像情報における各色成分の値を求める第１の演算手段と、この取得手段で求めた各色成分の値を用い、各色成分の値が等しくなるようなホワイトバランスの調整値を算出する第２の演算手段と、自動露出機能による絞り値が変化した場合は、前記第２の演算手段により算出されたホワイトバランスの調整値となるように、各色成分に対するゲインを調整する調整手段と、自動露出機能による絞り値が変化していない場合は、前記調整手段によるゲインの調整をロックする制御手段とを具備したことを特徴とする。 The invention according to claim 5 is an image pickup device that photoelectrically converts an optical image to be imaged into image information for each color component through a color filter of at least three colors, and each color component in the image information obtained by this image pickup device. A first calculation means for obtaining a value, a second calculation means for calculating a white balance adjustment value so that the values of each color component become equal using the value of each color component obtained by this acquisition means, and an automatic exposure function. When the aperture value is changed by, the adjustment means for adjusting the gain for each color component and the aperture value by the automatic exposure function are changed so as to be the white balance adjustment value calculated by the second calculation means. If not, the control means for locking the adjustment of the gain by the adjustment means is provided .
請求項６記載の発明は、撮像対象となる光像を少なくとも３色の色フィルタを介して各色成分毎の画像情報に光電変換する撮像素子で得た、各色成分毎の画像情報の平均値を求める第１の演算工程と、この第１の演算工程で求めた各色成分毎の画像情報の平均値を用い、最も輝度信号に近い色成分の画像情報の平均値を基準として他の各色成分毎の画像情報の平均値に対する第１の係数を求める第２の演算工程と、この第２の演算工程で求めた各第１の係数によりホワイトバランスの調整値を算出する第３の演算工程と、前記第３の演算工程で算出したホワイトバランスの調整値に対して所定値を加減して微調整する第４の演算工程と、所定の条件である場合は、前記第３の演算工程で算出したホワイトバランスの調整値となるように直ちに調整する第４の演算工程と、を有したことことを特徴とする。 According to the invention of claim 6, the average value of the image information for each color component obtained by an image sensor that photoelectrically converts an optical image to be imaged into image information for each color component through a color filter of at least three colors. Using the first calculation step to be obtained and the average value of the image information for each color component obtained in this first calculation step, for each other color component based on the average value of the image information of the color component closest to the brightness signal. A second calculation step for obtaining the first coefficient with respect to the average value of the image information of the image, and a third calculation step for calculating the white balance adjustment value from each of the first coefficients obtained in the second calculation step. Calculated in the fourth calculation step in which a predetermined value is added or subtracted with respect to the white balance adjustment value calculated in the third calculation step, and in the case of a predetermined condition, in the third calculation step. It is characterized by having a fourth calculation step of immediately adjusting the white balance adjustment value.
請求項７記載の発明は、撮像対象となる光像を少なくとも３色の色フィルタを介して各色成分毎の画像情報に光電変換する撮像素子で得た画像情報における各色成分の値を求める第１の演算工程と、この第１の演算工程で求めた各色成分の値を用い、各色成分の値が等しくなるようなホワイトバランスの調整値を算出する第２の演算工程と、自動露出機能による絞り値が変化した場合は、前記第２の演算工程により算出されたホワイトバランスの調整値となるように、各色成分に対するゲインを調整し、自動露出機能による絞り値が変化していない場合は、前記各色成分に対するゲインの調整をロックする調整工程とを有したことことを特徴とする。 The first aspect of the invention according to claim 7 is to obtain the value of each color component in the image information obtained by an image pickup device that photoelectrically converts an optical image to be imaged into image information for each color component through a color filter of at least three colors. The second calculation process for calculating the white balance adjustment value so that the values of each color component become equal using the value of each color component obtained in the first calculation process and the aperture by the automatic exposure function. When the value changes, the gain for each color component is adjusted so that the white balance adjustment value calculated by the second calculation step is obtained. If the aperture value by the automatic exposure function does not change, the above It is characterized by having an adjustment step of locking the adjustment of the gain for each color component.
【００９５】
【発明の効果】
請求項１または請求項６記載の発明によれば、所定の条件である場合は、直ちにホワイトバランスを調整し、それ以外の場合は、徐々にホワイトバランスを調整することができるので、例えば、露出値が大きく変化するなどでホワイトバランスが大きく変化した場合にはこれに迅速に追従する反面、一旦ホワイトバランスが調整された後はホワイトバランスの変化に対しても過敏に反応せず、動画撮影時などにおいて自然な画像を得ることが可能となる。
[0995]
【Effect of the invention】
According to the invention of claim 1 or 6 , the white balance can be adjusted immediately under the predetermined conditions, and the white balance can be adjusted gradually in other cases. Therefore, for example, exposure. When the white balance changes significantly due to a large change in value, etc., it quickly follows this, but once the white balance is adjusted, it does not react sensitively to changes in the white balance, and when shooting movies. It is possible to obtain a natural image in such cases.
請求項２記載の発明によれば、上記請求項１記載の発明の効果に加えて、最も輝度信号に近い色成分の画像情報の平均値に対する他の色成分の画像情報の平均値の係数からホワイトバランスの調整値を算出することで、一括してホワイトバランスを調整することができ、より短時間のうちに被写体の変化に対してホワイトバランスを追従させることができる。 According to the invention of claim 2, in addition to the effect of the invention of claim 1, from the coefficient of the average value of the image information of other color components with respect to the average value of the image information of the color component closest to the brightness signal. By calculating the white balance adjustment value, the white balance can be adjusted all at once, and the white balance can be made to follow the change of the subject in a shorter time.
請求項３または４記載の発明によれば、上記請求項１または２記載の発明の効果に加えて、ホワイトバランスの粗調整後に正確な調整値に収束するまでの画像での色合いの変化を自然なものとすることができる。 According to the invention of claim 3 or 4 , in addition to the effect of the invention of claim 1 or 2 , the change in hue in the image after the rough adjustment of the white balance until it converges to an accurate adjustment value is natural. Can be.
請求項５または７記載の発明によれば、絞り値に変化が生じた際にのみ、ホワイトバランス調整をし直すこととなるので、絞り値が変化しない状態では表示される被写体の画像の色合いが急激に変化してしまうことがなく、モニタ表示される画像が極めて自然な違和感のないものとなる。 According to the invention of claim 5 or 7 , the white balance adjustment is readjusted only when the aperture value changes, so that the hue of the image of the subject displayed when the aperture value does not change is changed. The image does not change suddenly, and the image displayed on the monitor becomes extremely natural and comfortable.
Claims (7)
この撮像素子で得た画像情報における各色成分の値を求める第１の演算手段と、
この第１の演算手段で求めた各色成分の値を用い、各色成分の値が等しくなるようなホワイトバランスの調整値を算出する第２の演算手段と、
前記第２の演算手段により算出されたホワイトバランスの調整値に達するまでの間、各色成分に対するゲインを徐々に増減させる第１の調整手段と、
所定の条件である場合は、前記第２の演算手段により算出されたホワイトバランスの調整値となるように、各色成分に対するゲインを直ちに調整する第２の調整手段と
を具備したことを特徴とする電子撮像装置。An imaging element that photoelectrically converts an optical image to be imaged into image information for each color component through at least three color filters;
First calculating means for determining values of respective color components in image information obtained by the image pickup device
Second computing means for calculating a white balance adjustment value such that the values of the respective color components become equal using the values of the respective color components determined by the first computing means;
First adjusting means for gradually increasing or decreasing the gain for each color component until the adjustment value of the white balance calculated by the second calculating means is reached;
And a second adjusting means for immediately adjusting the gain for each color component so as to obtain the adjustment value of the white balance calculated by the second calculating means when the predetermined condition is satisfied. An electronic imaging device characterized by
前記第２の演算手段は、最も輝度信号に近い色成分の値を基準とし、他の色成分の値がこの基準となる色成分の値に等しくなるようなホワイトバランスの調整値を算出し、
前記第１の調整手段および前記第２の調整手段は、前記他の色成分に対するゲインを調整する
ことを特徴とする請求項１記載の電子撮像装置。 The first computing means determines the value of each color component by averaging the image information for each color component;
The second computing means calculates a white balance adjustment value based on the value of the color component closest to the luminance signal as the reference, and the values of the other color components become equal to the value of the reference color component.
The electronic imaging device according to claim 1, wherein the first adjustment means and the second adjustment means adjust gains for the other color components .
この撮像素子で得た画像情報における各色成分の値を求める第１の演算手段と、First calculating means for determining values of respective color components in image information obtained by the image pickup device;
この第１の演算手段で求めた各色成分の値を用い、各色成分の値が等しくなるようなホワイトバランスの調整値を算出する第２の演算手段と、Second computing means for calculating a white balance adjustment value such that the values of the respective color components become equal using the values of the respective color components determined by the first computing means;
自動露出機能による絞り値が変化した場合は、前記第２の演算手段により算出されたホワイトバランスの調整値となるように、各色成分に対するゲインを調整する調整手段と、Adjusting means for adjusting gains for respective color components so as to obtain the adjustment value of the white balance calculated by the second calculating means when the aperture value by the automatic exposure function changes;
自動露出機能による絞り値が変化していない場合は、前記調整手段によるゲインの調整をロックする制御手段とAnd control means for locking the adjustment of the gain by the adjusting means when the aperture value by the automatic exposure function is not changed.
を具備したことを特徴とする電子撮像装置。An electronic imaging apparatus comprising:
この第１の演算工程で求めた各色成分毎の画像情報の平均値を用い、最も輝度信号に近い色成分の画像情報の平均値を基準として他の各色成分毎の画像情報の平均値に対する第１の係数を求める第２の演算工程と、
この第２の演算工程で求めた各第１の係数によりホワイトバランスの調整値を算出する第３の演算工程と、
前記第３の演算工程で算出したホワイトバランスの調整値に対して所定値を加減して微調整する第４の演算工程と、
所定の条件である場合は、前記第３の演算工程で算出したホワイトバランスの調整値と なるように直ちに調整する第４の演算工程と
を有したことを特徴とするホワイトバランス調整方法。A first operation step of obtaining an average value of image information for each color component obtained by an imaging device that photoelectrically converts a light image to be imaged into image information for each color component via at least three color filters;
The average value of the image information of each color component obtained in the first calculation step is used to determine the average value of the image information of each of the other color components based on the average value of the image information of the color component closest to the luminance signal. A second operation step for obtaining a coefficient of 1;
A third operation step of calculating a white balance adjustment value by each first coefficient obtained in the second operation step ;
A fourth calculation step of performing fine adjustment by adding or subtracting a predetermined value to the adjustment value of the white balance calculated in the third calculation step;
White balance adjustment characterized in that, in the case of a predetermined condition, there is a fourth operation step of immediately adjusting to the adjustment value of white balance calculated in the third operation step. Method.
この第１の演算工程で求めた各色成分の値を用い、各色成分の値が等しくなるようなホワイトバランスの調整値を算出する第２の演算工程と、
自動露出機能による絞り値が変化した場合は、前記第２の演算工程により算出されたホワイトバランスの調整値となるように、各色成分に対するゲインを調整し、自動露出機能による絞り値が変化していない場合は、前記各色成分に対するゲインの調整をロックする調整工程と
を有したことを特徴とするホワイトバランス調整方法。 A first operation step of obtaining values of respective color components in image information obtained by an image pickup element which photoelectrically converts a light image to be imaged into image information for each color component through at least three color filters;
A second operation step of calculating a white balance adjustment value such that the values of the color components become equal using the values of the respective color components determined in the first operation step;
When the aperture value by the automatic exposure function changes, the gain for each color component is adjusted so that the adjustment value of the white balance calculated by the second calculation step is obtained, and the aperture value by the automatic exposure function is changing If not, the adjustment step of locking the adjustment of the gain for each color component
The white balance adjustment method characterized by having .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11217378A JP2001045515A (en) | 1999-07-30 | 1999-07-30 | Electronic image pickup device and white balance adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11217378A JP2001045515A (en) | 1999-07-30 | 1999-07-30 | Electronic image pickup device and white balance adjustment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001045515A JP2001045515A (en) | 2001-02-16 |
| JP2001045515A5 true JP2001045515A5 (en) | 2005-04-07 |
Family
ID=16703246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11217378A Abandoned JP2001045515A (en) | 1999-07-30 | 1999-07-30 | Electronic image pickup device and white balance adjustment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001045515A (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2751297B2 (en) * | 1989-01-24 | 1998-05-18 | ソニー株式会社 | Auto white balance circuit |
| JPH03148989A (en) * | 1989-11-02 | 1991-06-25 | Minolta Camera Co Ltd | White balance adjusting device |
| JP3135381B2 (en) * | 1992-09-11 | 2001-02-13 | キヤノン株式会社 | Imaging device |
| JP3348320B2 (en) * | 1993-11-30 | 2002-11-20 | ソニー株式会社 | Video camera |
| JPH07307953A (en) * | 1994-05-16 | 1995-11-21 | Hitachi Ltd | White balance device |
| JPH0898200A (en) * | 1994-09-29 | 1996-04-12 | Sanyo Electric Co Ltd | Video camera |
| JPH1118102A (en) * | 1997-06-20 | 1999-01-22 | Sanyo Electric Co Ltd | Signal-processing circuit |
-
1999
- 1999-07-30 JP JP11217378A patent/JP2001045515A/en not_active Abandoned
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3892648B2 (en) | Image input device, white balance adjustment method, and computer-readable recording medium storing program for executing the method | |
| EP0658058B1 (en) | White balance adjustment apparatus | |
| US7483064B2 (en) | Imaging apparatus | |
| CN110536051B (en) | Image pickup apparatus, control method thereof, and storage medium | |
| KR100199322B1 (en) | White balance adjusting apparatus automatically adjusting white balance on the basis of color information signal obttained from image sensing device | |
| US20070159537A1 (en) | Imaging apparatus and method | |
| CA2030144A1 (en) | White balance adjusting apparatus for automatically adjusting white balance in response to luminance information signal and color information signal obtained from image sensing device | |
| US20050264682A1 (en) | Exposure control apparatus and exposure control method | |
| WO2002098128A1 (en) | Autofocusing method that is insensitive to scene illumination level | |
| JPH09298683A (en) | Video signal processing method and video signal processor | |
| JP2003235050A (en) | Image processing apparatus, image processing program, and image processing method | |
| JP2003520505A (en) | Method and apparatus for modifying the color saturation of an electronically acquired image | |
| KR101005769B1 (en) | Auto exposure and auto white-balance method for detecting high dynamic range conditions | |
| JP2001045515A5 (en) | ||
| JP2007208642A (en) | Image signal processing circuit and imaging system | |
| JP2008010927A (en) | Imaging apparatus | |
| JP2007267170A (en) | Electronic camera with chroma saturation regulating function and image processing program | |
| JP2002281512A (en) | Device and method for controlling white balance | |
| JP2629907B2 (en) | Contour compensation signal control device | |
| JP2006229355A (en) | Electronic camera | |
| JPH08237545A (en) | Control method for video camera, and video camera | |
| JP2024099302A (en) | Image processing apparatus, image processing method, and computer program | |
| JP2001036923A (en) | Automatic white balance adjusting device and its method | |
| JPH0828879B2 (en) | White balance adjuster | |
| JP2614542B2 (en) | White balance adjustment device |