Image pickup apparatus having function of suppressing fixed pattern noise
First Claim
1. An image pickup apparatus comprising:
- an image pickup unit including a light receiving pixel area including plural pixels each configured to accumulate photoelectric charge and to output signal and a comparative pixel area configured to output always one of dark signal in a state free of photoelectric charge and signal in a state of resetting photoelectric charge;
a first storing unit configured to store and hold preliminarily fixed pattern noise (FPN) component values of the light receiving pixel area of the image pickup unit;
a second storing unit configured to store and hold preliminarily FPN component value of the comparative pixel area of the image pickup unit;
a first correction unit configured to perform predetermined comparison processing between the signal from the comparative pixel area of the image pickup unit and the FPN component value stored and held in the second storing unit, and to correct the FPN component values stored and held in the first storing unit; and
a second correction unit configured to correct the signal from the light receiving pixel area of the image pickup unit by the FPN component values after correction by the first correction unit.
2 Assignments
0 Petitions
Accused Products
Abstract
An image pickup apparatus comprises an image pickup unit including a light receiving pixel area including plural pixels each configured to accumulate photoelectric charge and to output signal and a comparative pixel area configured to output always, for example, dark signal in a state free of photoelectric charge, a first storing unit configured to store FPN component values of the light receiving pixel area, a second storing unit configured to store preliminarily FPN component value of the comparative pixel area, a first correction unit configured to perform predetermined comparison processing between the signal from the comparative pixel area and the FPN component value stored in the second storing unit, and to correct the FPN component values stored in the first storing unit, and a second correction unit configured to correct the signal from the light receiving pixel area by the FPN component values after correction by the first correction unit.
-
Citations
12 Claims
-
1. An image pickup apparatus comprising:
-
an image pickup unit including a light receiving pixel area including plural pixels each configured to accumulate photoelectric charge and to output signal and a comparative pixel area configured to output always one of dark signal in a state free of photoelectric charge and signal in a state of resetting photoelectric charge;
a first storing unit configured to store and hold preliminarily fixed pattern noise (FPN) component values of the light receiving pixel area of the image pickup unit;
a second storing unit configured to store and hold preliminarily FPN component value of the comparative pixel area of the image pickup unit;
a first correction unit configured to perform predetermined comparison processing between the signal from the comparative pixel area of the image pickup unit and the FPN component value stored and held in the second storing unit, and to correct the FPN component values stored and held in the first storing unit; and
a second correction unit configured to correct the signal from the light receiving pixel area of the image pickup unit by the FPN component values after correction by the first correction unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An image pickup apparatus comprising:
-
image pickup means including a light receiving pixel area including plural pixels each for accumulating photoelectric charge and outputting signal and a comparative pixel area for outputting always one of dark signal in a state free of photoelectric charge and signal in a state of resetting photoelectric charge;
first storing means for storing and holding preliminarily fixed pattern noise (FPN) component values of the light receiving pixel area of the image pickup means;
second storing means for storing and holding preliminarily FPN component value of the comparative pixel area of the image pickup means;
first correction means for performing predetermined comparison processing between the signal from the comparative pixel area of the image pickup means and the FPN component value stored and held in the second storing means, and for correcting the FPN component values stored and held in the first storing means; and
second correction means for correcting the signal from the light receiving pixel area of the image pickup means by the FPN component values after correction by the first correction means.
-
-
12. A method of suppressing fixed pattern noise of an image pickup apparatus, comprising:
-
configuring an image pickup unit to include a light receiving pixel area including plural pixels configured to accumulate photoelectric charge and to output signal and a comparative pixel area configured to output always one of dark signal in a state free of photoelectric charge and signal in a state of resetting photoelectric charge;
storing and holding preliminarily fixed pattern noise (FPN) component values of the light receiving pixel area of the image pickup unit;
storing and holding preliminarily FPN component value of the comparative pixel area of the image pickup unit;
performing predetermined comparing processing between the signal from the comparative pixel area of the image pickup unit and the FPN component value stored and held, and correcting the FPN component values of the light receiving pixel area stored and held preliminarily; and
correcting the signal from the light receiving pixel area of the image pickup unit by the FPN component values after the correcting.
-
Specification