Image pickup apparatus, image pickup method, and storage medium
View Patent ↗An image pickup apparatus, including a controller, the controller generating a first image by a first signal which is based on charge obtained by a first charge accumulation performed within a first time period corresponding to one frame of an image group, the controller generating a second image using at least a second signal which is based on the charge obtained by the plurality of times of second charge accumulations performed within a first time period, and the controller, in a first case where a time of the first charge accumulation is less than a predetermined time, generating a second image by the second signal without using the first signal, and in a second case where the time of the first charge accumulation is the predetermined time or more, generating the second image using the first signal and the second signal.
1. An image pickup apparatus, comprising:
a pixel array having a plurality of pixels arranged two-dimensionally therein, the plurality of pixels each including: a photoelectric converter that performs photoelectric conversion; a first charge holding section that holds a charge obtained due to a first charge accumulation by the photoelectric converter; and a second charge holding section that holds a charge obtained due to a plurality of times of second charge accumulations by the photoelectric converter; and
a controller, the controller generating a first image by a first signal which is based on the charge obtained by the first charge accumulation performed within a first time period corresponding to one frame of an image group, the controller generating a second image using at least a second signal which is based on the charge obtained by the plurality of times of second charge accumulations performed within the first time period, and the controller, in a first case where a time of the first charge accumulation is less than a predetermined time, generating the second image by the second signal without using the first signal, and in a second case where the time of the first charge accumulation is the predetermined time or more, generating the second image using the first signal and the second signal.
2. The image pickup apparatus according to claim 1 , wherein
the predetermined time is a time based on a time of an interval between the plurality of times of second charge accumulations.
3. The image pickup apparatus according to claim 1 , wherein
when the number of times of the second charge accumulations in the first case is assumed to be a and the number of times of the second charge accumulations in the second case is assumed to be b, the controller generates the second image using the second signal and a value obtained by multiplying the first signal by (a−b)a.
4. The image pickup apparatus according to claim 1 , wherein
in the second case, a center of a time period of the first charge accumulation is set so as to coincide with a center of a time period from a timing of the second charge accumulation immediately before the first charge accumulation of the plurality of times of second charge accumulations to a timing of the second charge accumulation immediately after the first charge accumulation of the plurality of times of second charge accumulations.
5. The image pickup apparatus according to claim 1 , wherein
the controller generates a first image group including a plurality of the first images by sequentially generating the first image at a predetermined frame rate and generates a second image group including a plurality of the second images by sequentially generating the second image at the predetermined frame rate.
6. The image pickup apparatus according to claim 1 , wherein
the first image is employed in a still image, and the second image is employed in a moving image.
7. The image pickup apparatus according to claim 1 , wherein
the first charge accumulation and the second charge accumulation are performed exclusively.
8. The image pickup apparatus according to claim 1 , wherein
a sum total of times of the plurality of times of second charge accumulations in the first case is equivalent to a time of the first charge accumulation in the first case.
9. The image pickup apparatus according to claim 1 , wherein
a first transfer transistor that transfers to the first charge holding section the charge obtained by the first charge accumulation, a second transfer transistor that transfers to the second charge holding section the charge obtained by the second charge accumulation, and a reset transistor that resets the photoelectric converter, are connected to the photoelectric converter,
a time of the first charge accumulation is a time from a timing at which reset on the photoelectric converter by the reset transistor is released to a timing at which transfer of charge by the first transfer transistor to the first holding section from the photoelectric converter finishes, and
a time of the second charge accumulation is a time from a timing at which reset of the photoelectric converter by the reset transistor is released to a timing at which transfer of charge by the second transfer transistor to the second holding section from the photoelectric converter finishes.
10. An image pickup method, comprising:
generating a first image by a first signal which is based on a charge obtained due to a first charge accumulation by a photoelectric converter performed within a first time period corresponding to one frame of an image group; and
generating a second image using at least a second signal which is based on a charge obtained due to a plurality of times of second charge accumulations by the photoelectric converter performed within the first time period, the second image, in a first case where a time of the first charge accumulation is less than a predetermined time, being generated by the second signal without using the first signal, and the second image, in a second case where the time of the first charge accumulation is the predetermined time or more, being generated using the first signal and the second signal.
11. A non-transitory computer-readable storage medium having stored thereon a program for causing a computer to execute:
generating a first image by a first signal which is based on a charge obtained due to a first charge accumulation by a photoelectric converter performed within a first time period corresponding to one frame of an image group; and
generating a second image using at least a second signal which is based on a charge obtained due to a plurality of times of second charge accumulations by the photoelectric converter performed within the first time period, the second image, in a first case where a time of the first charge accumulation is less than a predetermined time, being generated by the second signal without using the first signal, and the second image, in a second case where the time of the first charge accumulation is the predetermined time or more, being generated using the first signal and the second signal.