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US 10,382,664 B2Granted
Imaging apparatus having settable focus detection areas and method for controlling the same
AssigneeCanon Kabushiki Kaisha
InventorKazunori Ishii
Life of this patent
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Abstract
An imaging apparatus includes an image sensor including a pair of photoelectric conversion units for each of a plurality of microlenses arranged in a matrix of rows and columns, and capable of reading a signal from each row. According to a size of a focus detection area, a camera control unit regularly sets on the image sensor a first area having as many rows in which signals for use in focus detection are read from the image sensor as a first predetermined number of rows, and a second area having as many rows in which signals for use in focus detection are not read as a second predetermined number of rows.
Claims21
An imaging apparatus comprising:
- an image sensor including a pair of photoelectric conversion units for each of a plurality of microlenses arranged in a matrix of rows and columns, and capable of reading a signal from each row;
- a memory storing a program;
- and
- one or more processors which, by executing the program, function as each unit comprising:
- a reading control unit configured to perform control so that a plurality of first areas each having a first predetermined number of rows in which signals used for focus detection are read when signals are read from the image sensor, and a plurality of second areas each having a second predetermined number of rows in which signals for use in focus detection are not read, are set by arranging each first area alternately with each second area on the image sensor;
- and
- a calculation unit configured to calculate an amount of correlation using, among signals read by a first reading control for reading signals for use in focus detection, a pair of focus detection signals obtained from an area on the image sensor corresponding to a set focus detection area,
- wherein, in a case where a second focus detection area larger in a column direction than a first focus detection area is set without changing the number of rows in which signals are read from the image sensor by the first reading control, the reading control unit makes the number of the first areas larger than in a case where the first focus detection area is set, and reduces the number of rows in which signals are read by the first reading control in each of the first areas, thereby making the first area smaller in the column direction than in the case where the first focus detection area is set.
5 more elements
An imaging apparatus comprising:
- an image sensor including a pair of photoelectric conversion units for each of a plurality of microlenses arranged in a matrix of rows and columns, and capable of reading a signal from each row;
- a memory storing a program;
- and
- one or more processors which, by executing the program, function as each unit comprising:
- a reading control unit configured to perform control so that a plurality of first areas, each having a first predetermined number of rows in which signals are read by first reading control for reading signals for use in focus detection when signals are read from the image sensor, and a plurality of second areas, each having a second predetermined number of rows in which signals are read without performing the first reading control as, are set by arranging each first area alternately with each second area on the image sensor;
- and
- a calculation unit configured to calculate an amount of correlation using, among the signals read by the first reading control, a pair of focus detection signals obtained from an area on the image sensor corresponding to a set focus detection area,
- wherein the number of the first areas and a size of each first area set by the reading control unit in a case where a size of the focus detection area is a first size and the number of the first areas and a size of each first area set by the reading control unit in a case where a size of the focus detection area is a second size different from the first size are different.
5 more elements
A method for controlling an imaging apparatus including an image sensor including a pair of photoelectric conversion units for each of a plurality of microlenses arranged in a matrix of rows and columns, and capable of reading a signal from each row, the method comprising:
- performing control so that a plurality of first areas, each having a first predetermined number of rows in which signals for use in focus detection are read when signals are read from the image sensor, and a plurality of second areas, each having a second predetermined number of rows in which signals for use in focus detection are not read, are set by arranging each first area alternately with each second area on the image sensor;
- and
- performing phase difference focus detection using, among signals read by first reading control for reading signals for use in focus detection, a pair of focus detection signals obtained from an area on the image sensor corresponding to a set focus detection area,
- wherein in a case where a second focus detection area larger in a column direction than a first focus detection area is set without changing the number of rows in which signals are read from the image sensor by the first reading control, the number of the first areas is made larger than in a case where the first focus detection area is set, and the number of rows in which signals are read by the first reading control in each of the first areas is reduced, thereby making the first area smaller in the column direction than in the case where the first focus detection area is set.
1 more element
A method for controlling an imaging apparatus including an image sensor including a pair of photoelectric conversion units for each of a plurality of microlenses arranged in a matrix of rows and columns, and capable of reading a signal from each row, the method comprising:
- performing control so that a plurality of first areas, each having a first predetermined number of rows in which signals are read by first reading control for reading signals for use in focus detection when signals are read from the image sensor, and a plurality of second areas, each having a second predetermined number of rows in which signals are read without performing the first reading control, are set by arranging each first area alternately with each second area on the image sensor;
- and
- performing calculation of an amount of correlation using, among the signals read by the first reading control, a pair of focus detection signals obtained from an area on the image sensor corresponding to a set focus detection area,
- wherein the number of the first areas and a size of each first area set by the reading control unit in a case where a size of the focus detection area is a first size and the number of the first areas and a size of each first area set by the reading control unit in a case where a size of the focus detection area is a second size different from the first size are different.
1 more element
Dependencies are inferred from the claim text.