Image acquisition apparatus and control method with signal amplification

An image acquisition apparatus including a plurality of pixels, each of which includes a plurality of sub-pixels configured to detect different light beams, the apparatus comprising:

• a plurality of signal holders configured to hold a plurality of signals output from the plurality of sub-pixels, respectively;
• and
• a signal processor configured to acquire and process each of the plurality of signals from the plurality of signal holders,
• wherein the signal processor includes, as operation modes:
• a first mode of amplifying, by a predetermined amplification factor, the plurality of signals respectively held by the plurality of signal holding units, and individually outputting the plurality of signals, the first mode being a color mode, and
• a second mode of amplifying, by amplification factors at least some of which are different from the amplification factor in the first mode, the plurality of signals respectively held by the plurality of signal holders, and adding and outputting the plurality of signals, the second mode being a monochrome mode,
• each pixel includes, as the plurality of sub-pixels:
• a red pixel configured to detect red light,
• a green pixel configured to detect green light, and
• a blue pixel configured to detect blue light, and
• in a case where GR represents an amplification factor of a signal of the red pixel, GG represents an amplification factor of a signal of the green pixel, and GB represents an amplification factor of a signal of the blue pixel:
• GR:
• GG:
• GB=1:1:1 holds in the color mode, and
• GR:
• GG:
• GB=2:1:6 holds in the monochrome mode.