Still image and moving image capturing device
View Patent ↗When still images are captured, signals read from all pixel cells of a pixel cell array having a Bayer array of color filters are selected, as a first output to be recorded and displayed, by an output selector. When moving images are captured, a 9-pixel binned signal is selected as the first output by the output selector, and a differential component between an output signal of a pixel cell located at the center-of-mass position of the 9 pixels, and the 9-pixel binned signal, is supplied as a second output from a memory circuit. Contrast information of a subject image is acquired based on the second output to perform lens focus adjustment.
1. A still image and moving image capturing device comprising:
a solid-state imaging element including a plurality of pixel cells arranged in a matrix;
an all-pixel reader configured to read all pixels to generate a still image;
a pixel-binning reader configured to read a plurality of pixels in at least one of a row direction and a column direction, with pixel binning, to generate a moving image; and
a pixel-component-in-binning-range reader configured to be capable of being operated simultaneously with the pixel-binning reader and read signal components of pixels within a spatial range within which pixel binning is performed by the pixel-binning reader, wherein:
one of the all-pixel reader and the pixel-binning reader is working while the other is not active, and
the signal read out by the pixel-component-in-binning-range reader contains a signal component of a pixel closest to a center-of-mass position of the pixels binned by the pixel-binning reader.
2. The still image and moving image capturing device of claim 1 , wherein
the solid-state imaging element has an array of color filters arranged in a matrix where color phase coding is performed in units of 2 pixels×2 pixels, and
the pixel-binning reader bins pixels having the same color phase in units of a range formed by 2n+1 (n is a natural number) pixels in the row direction and 2m+1 (m is a natural number) pixels in the column direction, and the center-of-mass positions of the binned pixels have a pitch of 2n+1 pixels in the row direction and a pitch of 2m+1 pixels in the column direction.
3. The still image and moving image capturing device of claim 1 , wherein
the signal read out by the pixel-component-in-binning-range reader contains a differential component between the signal component of the pixel closest to the center-of-mass position of the pixels binned by the pixel-binning reader, and a signal component of the binned pixels.
4. The still image and moving image capturing device of claim 2 , wherein
the signal read out by the pixel-component-in-binning-range reader contains a differential component between a signal component of the pixels binned by the pixel-binning reader, and a signal component of a pixel located at a spatial center in each unit in which pixels having the same color phase are binned within the range formed by 2n+1 (n is a natural number) pixels in the row direction and 2m+1 (m is a natural number) pixels in the column direction.
5. The still image and moving image capturing device of claim 1 , further comprising:
a contrast detector configured to detect contrast information of a subject from the signal read out by the pixel-component-in-binning-range reader.
6. The still image and moving image capturing device of claim 5 , further comprising:
a lens configured to image a subject image onto the solid-state imaging element;
a focus adjuster configured to change a focus state of the lens on the solid-state imaging element; and
a controller configured to control focus adjustment of the focus adjuster based on the contrast information of the subject image obtained from the contrast detector so that a contrast of the subject image has a maximum amplitude.
7. The still image and moving image capturing device of claim 5 , wherein
the contrast detector generates the contrast information of the subject image by averaging signal components of target pixels located within a predetermined area previously set in a light receiving area in which pixel cells of the solid-state imaging element are arranged, of target pixels from which signals are to be read out by the pixel-component-in-binning-range reader.
8. The still image and moving image capturing device of claim 1 , wherein
the solid-state imaging element multiplexes the image signal read out by the pixel-binning reader and the signal read out by the pixel-component-in-binning-range reader to a single-line signal and outputs the single-line signal.