Image capturing apparatus, method for controlling the same, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorHideta Nishizawa
Life of this patent
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Abstract
An image capturing apparatus includes a pixel for performing a photoelectric conversion, an AD converter configured to perform an AD conversion of a signal of the pixel, and a control unit configured to perform an AD conversion in either a first AD conversion mode in which an image signal is obtained by performing an AD conversion by comparing the signal of the pixel with one of a plurality of reference signals with different gradients of a temporal change of a signal level or a second AD conversion mode in which a plurality of image signals with different gains are obtained by performing a plurality of AD conversions by comparing a signal of one pixel with a plurality of reference signals with different gradients of a temporal change of a signal level.
Claims10
An image capturing apparatus, comprising:
- a pixel for performing a photoelectric conversion;
- an AD converter configured to perform an AD conversion;
- at least one processor or circuit configured to function as:
- a control unit configured to switch, based on an image capturing mode, an AD conversion with the AD converter between a first AD conversion mode in which an image signal is obtained by performing an AD conversion by comparing a signal of the pixel with one of a plurality of reference signals with different gradients of a temporal change of a signal level from each other and counting a clock signal of a predetermined cycle until the signal of the pixel matches one of the plurality of reference signals and a second AD conversion mode in which a plurality of image signals with different gains from each other are sequentially obtained by performing a plurality of AD conversions by sequentially comparing a signal of one pixel with a plurality of reference signals with different gradients of a temporal change of a signal level from each other and counting the clock signal of the predetermined cycle until the signal of one pixel matches each of the plurality of reference signals.
A method for controlling an image capturing apparatus comprising a pixel for performing a photoelectric conversion and an AD converter for performing an AD conversion, the method comprising:
- performing control to switch, based on an image capturing mode, an AD conversion with the AD converter between a first AD conversion mode in which an image signal is obtained by performing an AD conversion by comparing a signal of the pixel with one of a plurality of reference signals with different gradients of a temporal change of a signal level from each other and counting a clock signal of a predetermined cycle until the signal of the pixel matches one of the plurality of reference signals and a second AD conversion mode in which a plurality of image signals with different gains from each other are sequentially obtained by performing a plurality of AD conversions by sequentially comparing a signal of one pixel with a plurality of reference signals with different gradients of a temporal change of a signal level from each other and counting the clock signal of the predetermined cycle until the signal of one pixel matches each of the plurality of reference signals.
A non-transitory computer-readable storage medium storing a program for causing a computer to execute a method for controlling an image capturing apparatus comprising a pixel for performing a photoelectric conversion and an AD converter for performing an AD conversion, the method comprising:
- performing control to switch, based on an image capturing mode, an AD conversion with the AD converter between a first AD conversion mode in which an image signal is obtained by performing an AD conversion by comparing a signal of the pixel with one of a plurality of reference signals with different gradients of a temporal change of a signal level from each other and counting a clock signal of a predetermined cycle until the signal of the pixel matches one of the plurality of reference signals and a second AD conversion mode in which a plurality of image signals with different gains from each other are sequentially obtained by performing a plurality of AD conversions by sequentially comparing a signal of one pixel with a plurality of reference signals with different gradients of a temporal change of a signal level from each other and counting the clock signal of the predetermined cycle until the signal of one pixel matches each of the plurality of reference signals.
Dependencies are inferred from the claim text.