IMAGE PICKUP APPARATUS CAPABLE OF CONTROLLING EXPOSURE DURING MOTION WITH HIGH SHUTTER SPEED, CONTROL METHOD THEREFOR, AND STORAGE MEDIUM
First Claim
1. An image pickup apparatus comprising:
- an image pickup device configured to accumulate electric charge corresponding to an amount of light incident on said image pickup device;
an amplification unit configured to amplify a signal obtained as a result of accumulating electric charge in said image pickup apparatus;
a control unit configured to control an electric charge accumulation time period in said image pickup device; and
an adjustment unit configured to adjust an amplification factor for said amplification unit,wherein in a case where said control unit changes the electric charge accumulation time period while said image pickup device is repeatedly accumulating electric charge, said adjustment unit adjusts an amplification factor for said amplification unit in accordance with the amount of change in the electric charge accumulation time period, and after the amplification factor for said amplification unit is adjusted in accordance with the amount of change in the electric charge accumulation time period, said adjustment unit brings the amplification factor for said amplification unit close to an amplification factor before adjustment in steps.
1 Assignment
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Accused Products
Abstract
An image pickup apparatus which is capable of suppressing changes in luminance during motion with high shutter speed while minimizing image degradation. An image pickup device accumulates electric charge corresponding to an amount of light incident thereon. An amplification unit amplifies a signal obtained as a result of accumulating electric charge in the image pickup apparatus. A control unit controls an electric charge accumulation time period in the image pickup device. An adjustment unit adjusts an amplification factor for the amplification unit. In a case where the control unit changes the electric charge accumulation time period while the image pickup device is repeatedly accumulating electric charge, the adjustment unit adjusts an amplification factor in accordance with the amount of change in the electric charge accumulation time period, and after adjustment, the adjustment unit brings the adjusted amplification factor close to an amplification factor before adjustment in steps.
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Citations
9 Claims
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1. An image pickup apparatus comprising:
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an image pickup device configured to accumulate electric charge corresponding to an amount of light incident on said image pickup device; an amplification unit configured to amplify a signal obtained as a result of accumulating electric charge in said image pickup apparatus; a control unit configured to control an electric charge accumulation time period in said image pickup device; and an adjustment unit configured to adjust an amplification factor for said amplification unit, wherein in a case where said control unit changes the electric charge accumulation time period while said image pickup device is repeatedly accumulating electric charge, said adjustment unit adjusts an amplification factor for said amplification unit in accordance with the amount of change in the electric charge accumulation time period, and after the amplification factor for said amplification unit is adjusted in accordance with the amount of change in the electric charge accumulation time period, said adjustment unit brings the amplification factor for said amplification unit close to an amplification factor before adjustment in steps. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control method for an image pickup apparatus having an image pickup device that accumulates electric charge corresponding to an amount of light incident on the image pickup apparatus and an amplification unit that amplifies a signal obtained as a result of accumulating electric charge in the image pickup apparatus, comprising:
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a control step of controlling an electric charge accumulation time period for accumulating the electric charge in the image pickup apparatus; and an adjustment step of adjusting an amplification factor for the amplification unit, wherein in a case where the electric charge accumulation time period is changed in said control step while said image pickup device is repeatedly accumulating electric charge, an amplification factor for said amplification unit is adjusted in said adjustment step in accordance with the amount of change in the electric charge accumulation time period, and after the amplification factor for said amplification unit in accordance with the amount of change in the electric charge accumulation time period is adjusted, the amplification factor for said amplification unit is brought close to an amplification factor before adjustment in steps in said adjustment step.
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9. A non-transitory computer-readable storage medium storing a control program for causing a computer to implement a control method for an image pickup apparatus having an image pickup device that accumulates electric charge corresponding to an amount of light incident on the image pickup apparatus and an amplification unit that amplifies a signal obtained as a result of accumulating electric charge in the image pickup apparatus, the control method comprising:
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a control step of controlling an electric charge accumulation time period for accumulating the electric charge in the image pickup apparatus; and an adjustment step of adjusting an amplification factor for the amplification unit, wherein in a case where the electric charge accumulation time period is changed in said control step while said image pickup device is repeatedly accumulating electric charge, an amplification factor for said amplification unit is adjusted in said adjustment step in accordance with the amount of change in the electric charge accumulation time period, and after the amplification factor for said amplification unit in accordance with the amount of change in the electric charge accumulation time period is adjusted, the amplification factor for said amplification unit is brought close to an amplification factor before adjustment in steps in said adjustment step.
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Specification