Color filter array
Provided is a color filter array. According to one embodiment, the color filter array may comprise a repeating series of 2*2 cell structures including one red pixel, two green pixels, and one clear pixel, and the one red pixel and the one clear pixel in the 2*2 cell structure may be arranged in a first diagonal direction and the two green pixels may be arranged in a second diagonal direction.
1 . A color filter array (CFA) comprising:
a repeating series of 2*2 cell structures comprising one red pixel, two green pixels, and one clear pixel,
wherein, in the 2*2 cell structure, the one red pixel and the one clear pixel are arranged in a first diagonal direction and the two green pixels are arranged in a second diagonal direction,
wherein
the red pixel passes light in a red wavelength band,
the green pixels pass light in a green wavelength band, and
the clear pixel passes the red wavelength band, the green wavelength band, and a blue wavelength band,
wherein fourth color information corresponding to a blue color for an image application is created through a combination of first color information according to light passing through the red pixel, second color information according to light passing through the green pixels, and third color information according to light passing through the clear pixel, and
wherein fifth color information corresponding to a yellow color for a recognition application is created through a combination of first color information according to light passing through the red pixel, second color information according to light passing through the green pixels, and third color information according to light passing through the clear pixel.
2 . The CFA of claim 1 , wherein the fourth color information is created by subtracting the first color information and the second color information from the third color information, and
wherein the fifth color information is created by using the first color information and the second color information.
3 . The CFA of claim 1 , wherein the image application comprises a camera application for capturing a photo.
4 . The CFA of claim 1 , wherein the recognition application comprises a recognition application for computer vision.
5 . A sensing device comprising:
a color filter array (CFA) comprising a repeating series of 2*2 cell structures comprising one red pixel, two green pixels, and one clear pixel;
an image sensor configured to receive light passing through the CFA and configured to create sensing information; and
a signal processor configured to create color information corresponding to the sensing information,
wherein, in the 2*2 cell structure, the one red pixel and the one clear pixel are arranged in a first diagonal direction and the two green pixels are arranged in a second diagonal direction,
wherein
the red pixel passes light in a red wavelength band,
the green pixels pass light in a green wavelength band, and
the clear pixel passes the red wavelength band, the green wavelength band, and a blue wavelength band,
wherein fourth color information corresponding to a blue color for an image application is created through a combination of first color information according to light passing through the red pixel, second color information according to light passing through the green pixels, and third color information according to light passing through the clear pixel, and
wherein fifth color information corresponding to a yellow color for a recognition application is created through a combination of first color information according to light passing through the red pixel, second color information according to light passing through the green pixels, and third color information according to light passing through the clear pixel.
6 . A signal processing method comprising:
receiving sensing information created through a color filter array (CFA) comprising a repeating series of 2*2 cell structures comprising one red pixel, two green pixels, and one clear pixel; and
creating color information corresponding to the sensing information by considering a target application,
wherein, in the 2*2 cell structure, the one red pixel and the one clear pixel are arranged in a first diagonal direction and the two green pixels are arranged in a second diagonal direction,
wherein the creating of the color information comprises creating fourth color information corresponding to a blue color through a combination of first color information according to light passing through the red pixel, second color information according to light passing through the green pixels, and third color information according to light passing through the clear pixel when the target application is an image application, and
wherein the creating of the color information comprises creating fifth color information corresponding to a yellow color through a combination of first color information according to light passing through the red pixel, second color information according to light passing through the green pixels, and third color information according to light passing through the clear pixel when the target application is a recognition application.
7 . A non-transitory computer-readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the method of claim 6 .