Image sensor with an integrated infrared cut-off filter

An imaging system comprising:

• an image sensor including a plurality of image recording pixels and a plurality of reserved pixels, wherein a subset of the plurality of reserved pixels are covered by an infrared cut-off filter;
• an electronic processor coupled to the image sensor and configured to:
• determine a first visible light intensity for the subset of the plurality of reserved pixels;
• determine a second visible light intensity for the plurality of image recording pixels;
• and
• control the image sensor to operate in one of a day mode and a night mode by:
• determining a difference between the first visible light intensity and the second visible light intensity;
• comparing the difference to a visible light intensity threshold;
• controlling the image sensor to operate in a day mode when the difference exceeds the visible light intensity threshold;
• and
• controlling the image sensor to operate in a night mode when the difference does not exceed the visible light intensity threshold.