1. A solid-state imaging device, comprising: a pixel array unit including first pixels and second pixels, the first pixels corresponding to respective color components of a plurality of color components, the second pixels having luminance components as main components, the first pixels and the second pixels being arranged regularly in a matrix; a pixel drive circuitry configured to drive the pixels arranged in the pixel array unit; and a signal processing circuitry configured to execute predetermined weighted addition processing and calculate a pixel value of an output image by using only pixel information acquired from the first pixels, the weighted addition processing being in at least one of a horizontal direction, a vertical direction and an oblique direction, wherein the output image includes an image of a Bayer array, the signal processing circuitry is configured to execute the weighted addition processing to acquire a pixel value of the image of the Bayer array, and the pixel array unit includes the second pixels arranged in a checkered pattern and the first pixels arranged in the remaining part, and includes a floating diffusion area that is shared in a predetermined pixel unit including a plurality of pixels, the plurality of pixels each including a photoelectric conversion element, and that holds charge accumulated by each of the photoelectric conversion elements of the pixels to be read out as a signal.