Imaging apparatus and method for driving imaging apparatus
An imaging apparatus is provided and includes: an imaging device including a first color pixel, a second color pixel, a third color pixel, and the luminance-detecting pixels; a controlling section that generates first complementary color information by adding data of the first color pixel and data of the second color pixel adjacent to the first color pixel, generates second complementary color information by adding data of the second color pixel and data of the third color pixel adjacent to the second color pixel, and generates luminance information by adding respective data of luminance-detecting pixels adjacent to each other, when data of a reduced image having a reduced resolution as compared with a resolution for the whole pixels of the imaging device is generated, and a signal processing section that signal-processes the first complementary color information, the second complementary color information, and the luminance information to reproduce a taken image.
1. An imaging apparatus comprising:
an imaging device including a pixel array of color pixels and luminance-detecting pixels, wherein
the color pixels includes a first color pixel that detects an amount of incident light of a first color among three primary colors, a second color pixel that detect an amount of incident light of a second color among the three primary colors, and a third color pixel that detects an amount of incident light of a third color among the three primary colors,
the luminance-detecting pixels detect luminance information and are arranged adjacent to respective color pixels, and
the pixel array includes a line in which the first color pixel and the second color pixel are repeatedly arranged, a line in which the second color pixel and the third color pixel are repeatedly arranged, and a line in which only the luminance-detecting pixels are arranged;
a controlling section that generates first complementary color information by adding data of the first color pixel and data of the second color pixel adjacent to the first color pixel, generates second complementary color information by adding data of the second color pixel and data of the third color pixel adjacent to the second color pixel, and generates luminance information by adding respective data of luminance-detecting pixels adjacent to each other, when data of a reduced image having a reduced resolution as compared with a resolution for the whole pixels of the imaging device is generated, and
a signal processing section that signal-processes the first complementary color information, the second complementary color information, and the luminance information to reproduce a taken image.
2. The imaging apparatus according to claim 1 , wherein the color pixels are arranged in a first checkered pattern having a constant pitch in a longitudinal direction and a lateral direction thereof, and the luminance-detecting pixels are arranged in a second checkered pattern in which each of the luminance-detecting pixels is deviated by one-half of the constant pitch with respect to the longitudinal direction and the lateral direction of the color pixels.
3. The imaging apparatus according to claim 1 , wherein the pixel array of the imaging device is a square lattice array of a plurality of pixels, and among the plurality of pixels, pixels disposed at checkerwise positions are the luminance-detecting pixels and pixels disposed at remaining checkerwise positions are the color pixels.
4. The imaging apparatus according to claim 1 , wherein the imaging device is a CCD including an addition readout section that performs addition between data of the color pixels and addition between data of the luminance information pixels at a time of reading out data from respective pixels of the imaging device.
5. The imaging apparatus according to claim 1 wherein the imaging device is a CMOS including a data addition section that performs addition between data of the color pixels and addition between data of the luminance information pixels after reading out data from respective pixels of the imaging device.
6. A method for driving an imaging apparatus that includes an imaging device including a pixel array of color pixels and luminance-detecting pixels, wherein
the color pixels includes a first color pixel that detects an amount of incident light of a first color among three primary colors, a second color pixel that detect an amount of incident light of a second color among the three primary colors, and a third color pixel that detects an amount of incident light of a third color among the three primary colors,
the luminance-detecting pixels detect luminance information and are arranged adjacent to respective color pixels, and
the pixel array includes a line in which the first color pixel and the second color pixel are repeatedly arranged, a line in which the second color pixel and the third color pixel are repeatedly arranged, and a line in which only the luminance-detecting pixels are arranged,
the method comprising:
generating first complementary color information by adding data of the first color pixel and data of the second color pixel adjacent to the first color pixel, generating second complementary color information by adding data of the second color pixel and data of the third color pixel adjacent to the second color pixel, and generating luminance information by adding respective data of the luminance-detecting pixels adjacent to each other, when data of a reduced image having a reduced resolution as compared with a resolution for the whole pixels of the imaging device is generated, and
signal-processing the first complementary color information, the second complementary color information and the luminance information to reproduce a taken image.
7. The method for driving the imaging apparatus according to claim 6 , wherein the color pixels are arranged in a first checkered pattern having a constant pitch in a longitudinal direction and a lateral direction thereof, and the luminance-detecting pixels are arranged in a second checkered pattern in which each of the luminance-detecting pixels is deviated by one-half of the constant pitch with respect to the longitudinal direction and the lateral direction of the color pixels.
8. The method for driving the imaging apparatus according to claim 6 , wherein the pixel array of the imaging device is a square lattice array of a plurality of pixels, and among the plurality of pixels, pixels disposed at checkerwise positions are the luminance-detecting pixels and pixels disposed at remaining checkerwise positions are the color pixels.
9. The method for driving the imaging apparatus according to claim 6 , wherein the imaging device is a CCD, and the method further comprises performing addition between data of the color pixels and addition between data of the luminance information pixels at a time of reading out data from respective pixels of the imaging device.
10. The method for driving, the imaging apparatus according to claim 6 , wherein the imaging device is a CMOS, and the method further comprises performing addition between data of the color pixels and addition between data of the luminance information pixels after reading out data from respective pixels of the imaging device.