JP2013225772A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2013225772A5 JP2013225772A5 JP2012097076A JP2012097076A JP2013225772A5 JP 2013225772 A5 JP2013225772 A5 JP 2013225772A5 JP 2012097076 A JP2012097076 A JP 2012097076A JP 2012097076 A JP2012097076 A JP 2012097076A JP 2013225772 A5 JP2013225772 A5 JP 2013225772A5
- Authority
- JP
- Japan
- Prior art keywords
- pixel
- value
- image
- read
- image sensor
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims description 16
- 230000002950 deficient Effects 0.000 claims description 10
- 230000002093 peripheral Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
Description
上記目的を達成するために、複数の異なる読み出し方法により読み出し可能な撮像素子から読み出された画像を処理する本発明の画像処理装置は、前記撮像素子から読み出された画像を構成する画素のうち、欠陥画素か否かを判定する対象である検出対象画素の画素値と、該検出対象画素の複数の周辺画素を用いて求めた値との差分絶対値を求める算出手段と、前記差分絶対値に基づいて、前記検出対象画素が欠陥画素か否かを判定する判定手段とを有し、前記判定手段は、前記検出対象画素が欠陥画素であると判定するための条件に、前記差分絶対値が、第1の閾値と、該第1の閾値よりも大きい第2の閾値により予め決められた範囲内にあることを含み、前記撮像素子から複数の画素の画素信号を加算して画素値として読み出す場合に、画素信号を加算せずに読み出す場合よりも、より小さい値を前記第2の閾値として設定する。 In order to achieve the above object, an image processing apparatus according to the present invention for processing an image read from an image sensor that can be read by a plurality of different readout methods is provided for the pixels constituting the image read from the image sensor. Among them, a calculation means for obtaining a difference absolute value between a pixel value of a detection target pixel that is a target for determining whether or not the pixel is a defective pixel and a value obtained by using a plurality of peripheral pixels of the detection target pixel, and the difference absolute Determination means for determining whether or not the detection target pixel is a defective pixel based on a value, and the determination means sets the absolute difference as a condition for determining that the detection target pixel is a defective pixel. A pixel value obtained by adding pixel signals of a plurality of pixels from the image sensor, including a value that is within a range determined in advance by a first threshold value and a second threshold value that is greater than the first threshold value. If it reads as, Than when reading without adding element signal, it sets a smaller value as the second threshold value.
Claims (10)
前記撮像素子から読み出された画像を構成する画素のうち、欠陥画素か否かを判定する対象である検出対象画素の画素値と、該検出対象画素の複数の周辺画素を用いて求めた値との差分絶対値を求める算出手段と、
前記差分絶対値に基づいて、前記検出対象画素が欠陥画素か否かを判定する判定手段とを有し、
前記判定手段は、
前記検出対象画素が欠陥画素であると判定するための条件に、前記差分絶対値が、第1の閾値と、該第1の閾値よりも大きい第2の閾値により予め決められた範囲内にあることを含み、
前記撮像素子から複数の画素の画素信号を加算して画素値として読み出す場合に、画素信号を加算せずに画素値として読み出す場合よりも、より小さい値を前記第2の閾値として設定することを特徴とする画像処理装置。 An image processing apparatus that processes an image read from an image sensor that can be read by a plurality of different reading methods,
Of the pixels constituting the image read from the image sensor, the pixel value of the detection target pixel that is a target for determining whether or not it is a defective pixel, and the value obtained using a plurality of peripheral pixels of the detection target pixel A calculating means for obtaining a difference absolute value between
Determination means for determining whether or not the detection target pixel is a defective pixel based on the absolute difference value;
The determination means includes
The condition for determining that the detection target pixel is a defective pixel is such that the absolute difference value is within a range determined in advance by a first threshold value and a second threshold value that is greater than the first threshold value. Including
If the read as a pixel value by adding the pixel signals of a plurality of pixels from the image sensor, than when reading a pixel value without adding pixel signals, to set a smaller value as the second threshold value A featured image processing apparatus.
前記判定手段は、前記撮像素子から前記動画モードで画素値を読み出す場合に、前記静止画モードで画素値を読み出す場合よりも、より小さい値を前記第1の閾値として設定することを特徴とする請求項1または2に記載の画像処理装置。 The plurality of different readout methods include a still image mode for shooting a still image and a moving image mode for shooting a moving image,
The determination unit sets a smaller value as the first threshold value when reading a pixel value from the image sensor in the moving image mode than when reading a pixel value in the still image mode. The image processing apparatus according to claim 1 .
前記撮像素子から読み出された画像を構成する画素のうち、前記検出対象画素の画素値と、該検出対象画素の複数の周辺画素の画素値の最大値との差分絶対値である第1の差分絶対値を求める第1の算出手段と、
前記撮像素子から読み出された画像を構成する画素のうち、前記検出対象画素の複数の周辺画素の画素値の最大値と最小値との差分絶対値である第2の差分絶対値を求める第2の算出手段と、を有し、
前記判定手段は、前記第1の差分絶対値が、第1の閾値と、該第1の閾値よりも大きい第2の閾値により予め決められた範囲内にあり、且つ、前記第2の差分絶対値が予め決められた第3の閾値よりも大きい場合に、前記検出対象画素が欠陥画素であると判定することを特徴とする請求項1乃至6のいずれか1項に記載の画像処理装置。 The calculating means includes
Of the pixels constituting the image read from the image sensor, the pixel value of the detection pixel, the detection of a plurality of target pixels around the pixel which is a difference absolute value between the maximum value of the pixel values first First calculating means for obtaining a difference absolute value;
A second difference absolute value that is a difference absolute value between a maximum value and a minimum value of pixel values of a plurality of peripheral pixels of the detection target pixel among pixels constituting the image read from the image sensor is obtained. 2 calculation means,
The determination means has the first difference absolute value within a range determined in advance by a first threshold and a second threshold larger than the first threshold, and the second difference absolute value The image processing apparatus according to claim 1, wherein the detection target pixel is determined to be a defective pixel when the value is larger than a predetermined third threshold value.
算出手段が、前記撮像素子から読み出された画像を構成する画素のうち、欠陥画素か否かを判定する対象である検出対象画素の画素値と、該検出対象画素を用いて求めた値との差分絶対値を求める算出工程と、
判定手段が、前記差分絶対値に基づいて、前記検出対象画素が欠陥画素か否かを判定する判定工程と、を有し、
前記判定工程では、
前記検出対象画素が欠陥画素であると判定するための条件に、前記差分絶対値が、第1の閾値と、該第1の閾値よりも大きい第2の閾値により予め決められた範囲内にあることを含み、
前記撮像素子から複数の画素の画素信号を加算して画素値として読み出す場合に、画素信号を加算せずに読み出す場合よりも、より小さい値を前記第2の閾値として設定することを特徴とする画像処理方法。 An image processing method for processing an image read from an image sensor that can be read by a plurality of different readout methods,
The pixel value of the detection target pixel that is a target for determining whether or not the pixel is a defective pixel among the pixels constituting the image read from the image sensor, and the value obtained by using the detection target pixel A calculation step for obtaining a difference absolute value of
A determination step of determining whether the detection target pixel is a defective pixel based on the absolute difference value;
In the determination step,
The condition for determining that the detection target pixel is a defective pixel is such that the absolute difference value is within a range determined in advance by a first threshold value and a second threshold value that is greater than the first threshold value. Including
In the case where pixel signals of a plurality of pixels are added from the image sensor and read out as a pixel value , a smaller value is set as the second threshold value than in the case where the pixel signals are read out without being added Image processing method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012097076A JP6041523B2 (en) | 2012-04-20 | 2012-04-20 | Image processing apparatus and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012097076A JP6041523B2 (en) | 2012-04-20 | 2012-04-20 | Image processing apparatus and method |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2013225772A JP2013225772A (en) | 2013-10-31 |
JP2013225772A5 true JP2013225772A5 (en) | 2015-05-28 |
JP6041523B2 JP6041523B2 (en) | 2016-12-07 |
Family
ID=49595561
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2012097076A Active JP6041523B2 (en) | 2012-04-20 | 2012-04-20 | Image processing apparatus and method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP6041523B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6395621B2 (en) * | 2015-01-27 | 2018-09-26 | キヤノン株式会社 | Focus adjustment device, imaging device using the same, and focus adjustment method |
JP6602109B2 (en) * | 2015-08-28 | 2019-11-06 | キヤノン株式会社 | Control device, imaging device, control method, program, and storage medium |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4479373B2 (en) * | 2004-06-28 | 2010-06-09 | ソニー株式会社 | Image sensor |
JP2010081259A (en) * | 2008-09-25 | 2010-04-08 | Panasonic Corp | Solid-state imaging device |
JP2010130238A (en) * | 2008-11-26 | 2010-06-10 | Sony Corp | Defect correcting circuit and imaging device with same |
JP2010272916A (en) * | 2009-05-19 | 2010-12-02 | Yamaha Corp | White defect correction device of solid-state imaging element |
-
2012
- 2012-04-20 JP JP2012097076A patent/JP6041523B2/en active Active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2011205586A5 (en) | ||
JP2015096812A5 (en) | ||
JP2009171318A5 (en) | ||
JP2017161586A5 (en) | ||
JP2011041255A5 (en) | ||
JP2013161405A5 (en) | Subject determination device, subject determination method, and program | |
JP2013055640A5 (en) | ||
JP2013219675A5 (en) | ||
JP2015011557A5 (en) | ||
JP2015079193A5 (en) | ||
JP2015106290A5 (en) | ||
JP2016218758A5 (en) | ||
JP2018520531A5 (en) | ||
JP2016181072A5 (en) | ||
JP2017038169A5 (en) | ||
RU2018100398A (en) | BAD PIXELS CORRECTION IN THE INFRARED IMAGE CAPTURE DEVICE | |
JP2016038554A5 (en) | Imaging apparatus, control method therefor, and storage medium | |
JP2016036115A5 (en) | ||
JP2016110261A5 (en) | ||
JP2015187832A5 (en) | ||
JP2016126673A5 (en) | Information processing apparatus and method, program, storage medium, and video camera | |
JP2017072913A5 (en) | ||
JP2016144090A5 (en) | ||
JP2013225772A5 (en) | ||
JP2013250188A5 (en) |