Image sensor, operating method of image sensor, and electronic device including image sensor

An operating method of an image sensor including pixels and reference pixels, the method comprising:

• sensing signals from the pixels and the reference pixels;
• compensating signals of the pixels from among the sensed signals, based on signals corresponding to the reference pixels from among the sensed signals;
• and
• outputting the compensated signals,
• wherein the reference pixels are disposed between the pixels.

An electronic device comprising:

• a processor;
• and
• an image sensor configured to generate image data and configured to provide the image data to the processor,
• wherein the image sensor includes:
• a pixel array including pixels and reference pixels;
• an analog sensing circuit configured to sense signals from the pixels and the reference pixels;
• a digital logic circuit configured to receive the sensed signals from the analog sensing circuit and configured to compensate signals corresponding to the pixels from among the sensed signals by using signals corresponding to the reference pixels from among the sensed signals;
• and
• an interface circuit configured to output the compensated signals as the image data to the processor,
• wherein each of the reference pixels includes:
• a photodiode;
• reflection material disposed on the photodiode;
• a color filter disposed on the reflection material;
• and
• a micro lens disposed on the color filter.