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US 9,794,491 B2Granted
Imaging apparatus having anti-flicker timing offset, control method, and storage medium therefor
AssigneeCanon Kabushiki Kaisha
InventorNaoyuki Nakagawara
Life of this patent
Estimating the term…
Abstract
An imaging apparatus has a first mode in which a determination unit determines an exposure timing of an imaging unit based on a timing calculated by a calculation unit after a light metering unit performs light metering a first number of times, and a second mode in which the determination unit determines the exposure timing of the imaging unit based on the timing calculated by the calculation unit after the light metering unit performs the light metering a second number of times.
Claims12
An imaging apparatus comprising:
- an image sensor that makes continuous shootings in response to a request for continuous shooting from a user;
- a light meter that obtains a light amount of periodically changing light before an initial shooting of the continuous shootings, and obtains a light amount of the periodically changing light between the initial shooting and a subsequent shooting of the continuous shootings;
- and
- at least one processor that calculates, based on the light amount obtained before the initial shooting of the continuous shootings, information regarding a cycle interval of the periodically changing light and a first timing at which a light amount of the periodically changing light satisfies a predetermined brightness level, and
- calculates, based on the calculated information regarding the cycle interval and the first timing, an exposure start timing of the initial shooting;
- wherein the processor calculates, based on the light amount obtained between the initial shooting and the subsequent shooting, a second timing at which a light amount of the periodically changing light satisfies the predetermined brightness level, and
- calculates, based on the calculated information regarding the cycle interval and the second timing, an exposure start timing of the subsequent shooting,
- wherein the processor calculates the exposure start timing of the initial shooting, by adding the first timing to the information regarding the cycle interval, and
- wherein the processor calculates the exposure start timing of the subsequent shooting, by adding the second timing to the information regarding the cycle interval.
6 more elements
An imaging apparatus comprising:
- an image sensor that makes continuous shootings in response to a continuous shooting request from a user;
- a light meter that obtains a first number of light amounts by metering periodically changing light the first number of times before an initial shooting of the continuous shootings, and obtains a second number of light amounts by metering the periodically changing light the second number of times between the initial shooting and a subsequent shooting of the continuous shootings;
- at least one processor that calculates, based on the first number of light amounts obtained by the light meter before the initial shooting of the continuous shootings, a first timing at which a light amount of the periodically changing light satisfies a predetermined brightness level, and
- calculates, based on the first timing, an exposure start timing of the initial shooting;
- wherein the processor calculates, based on the second number of light amounts obtained by the light meter between the initial shooting and the subsequent shooting, a second timing at which a light amount of the periodically changing light satisfies the predetermined brightness level, and
- calculates, based on the second timing, an exposure start timing of the subsequent shooting,
- wherein the first number is larger than the second number,
- wherein the processor calculates the exposure start timing of the initial shooting, by adding the first timing to information regarding a cycle interval of the periodically changing light, and
- wherein the processor calculates the exposure start timing of the subsequent shooting, by adding the second timing to the information regarding the cycle interval of the periodically changing light.
6 more elements
A method for controlling an imaging apparatus including an image sensor, the method comprising:
- making continuous shootings using the image sensor in response to a request for continuous shooting from a user;
- performing light metering using a light meter that obtains a light amount of periodically changing light before an initial shooting of the continuous shootings, and obtains a light amount of the periodically changing light between the initial shooting and a subsequent shooting of the continuous shootings;
- calculating, using at least one processor, based on the light amount obtained before the initial shooting of the continuous shootings, information regarding a cycle interval of the periodically changing light and a first timing at which a light amount of the periodically changing light satisfies a predetermined brightness level;
- calculating, using the at least one processor, based on the calculated information regarding the cycle interval and the first timing, an exposure start timing of the initial shooting;
- and
- calculating, using the at least one processor, based on the light amount obtained between the initial shooting and the subsequent shooting, a second timing at which a light amount of the periodically changing light satisfies the predetermined brightness level;
- and
- calculating, using the at least one processor, based on the calculated information regarding the cycle interval and the second timing, an exposure start timing of the subsequent shooting,
- wherein the processor calculates the exposure start timing of the initial shooting, by adding the first timing to the information regarding the cycle interval, and
- wherein the processor calculates the exposure start timing of the subsequent shooting, by adding the second timing to the information regarding the cycle interval.
7 more elements
A method for controlling an imaging apparatus including an image sensor, the method comprising;
- making continuous shootings using the image sensor in response to a request for continuous shooting from a user;
- performing light metering using a light meter that obtains a first number of light amounts by metering periodically changing light the first number of times before an initial shooting of the continuous shootings, and obtains a second number of light amounts by metering the periodically changing light the second number of times between the initial shooting and a subsequent shooting of the continuous shootings;
- calculating, using at least one processor, based on the first number of light amounts obtained by the light meter before the initial shooting of the continuous shootings, a first timing at which a light amount of the periodically changing light satisfies a predetermined brightness level;
- calculating, using the at least one processor, based on the first timing, an exposure start timing of the initial shooting;
- calculating, using the at least one processor, based on the second number of light amounts obtained by the light meter between the initial shooting and the subsequent shooting, a second timing at which a light amount of the periodically changing light satisfies the predetermined brightness level;
- and
- calculating, using the at least one processor, based on the second timing, an exposure start timing of the subsequent shooting,
- wherein the first number is larger than the second number,
- wherein the at least one processor calculates the exposure start timing of the initial shooting, by adding the first timing to information regarding a cycle interval of the periodically changing light, and
- wherein the at least one processor calculates the exposure start timing of the subsequent shooting, by adding the second timing to the information regarding the cycle interval of the periodically changing light.
7 more elements
A non-transitory computer-readable storage medium storing a program for causing a computer to execute a method for controlling an imaging apparatus including an image sensor, the method comprising:
- making continuous shootings using the image sensor in response to a request for continuous shooting from a user;
- performing light metering using a light meter that obtains a light amount of periodically changing light before an initial shooting of the continuous shootings, and obtains a light amount of the periodically changing light between the initial shooting and a subsequent shooting of the continuous shootings;
- calculating, using at least one processor, based on the light amount obtained before the initial shooting of the continuous shootings, information regarding a cycle interval of the periodically changing light and a first timing at which a light amount of periodically changing light satisfies a predetermined brightness level;
- calculating, using the at least one processor, based on the calculated information regarding the cycle interval and the first timing, an exposure start timing of the initial shooting;
- calculating, using the at least one processor, based on the light amount obtained between the initial shooting and the subsequent shooting, a second timing at which a light amount of the periodically changing light satisfies the predetermined brightness level;
- and
- calculating, using the at least one processor, based on the calculated information regarding the cycle interval and the second timing, an exposure start timing of the subsequent shooting,
- wherein the processor calculates the exposure start timing of the initial shooting, by adding the first timing to the information regarding the cycle interval, and
- wherein the processor calculates the exposure start timing of the subsequent shooting, by adding the second timing to the information regarding the cycle interval.
6 more elements
A non-transitory computer-readable storage medium storing a program for causing a computer to execute a method for controlling an imaging apparatus including an image sensor, the method comprising:
- making continuous shootings using the image sensor in response to a request for continuous shooting from a user;
- performing light metering using a light meter that obtains a first number of light amounts by metering periodically changing light the first number of times before an initial shooting of the continuous shootings, and obtains a second number of light amounts by metering the periodically changing light the second number of times between the initial shooting and a subsequent shooting of the continuous shootings;
- calculating, using at least one processor, based on the first number of light amounts obtained by the light meter before the initial shooting of the continuous shootings, a first timing at which a light amount of the periodically changing light satisfies a predetermined brightness level;
- calculating, using the at least one processor, based on the first timing, an exposure start timing of the initial shooting;
- calculating, using the at least one processor, based on the second number of light amounts obtained by the light meter between the initial shooting and the subsequent shooting, a second timing at which a light amount of the periodically changing light satisfies the predetermined brightness level, and
- calculating, using the at least one processor, based on the second timing, an exposure start timing of the subsequent shooting,
- wherein the first number is larger than the second number,
- wherein the at least one processor calculates the exposure start timing of the initial shooting, by adding the first timing to information regarding a cycle interval of the periodically changing light, and
- wherein the at least one processor calculates the exposure start timing of the subsequent shooting, by adding the second timing to the information regarding the cycle interval of the periodically changing light.
6 more elements
Dependencies are inferred from the claim text.