Color filter array

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.

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.