Refrigerator camera modules and methods for preventing lens fog

A method of operating a refrigerator appliance comprising a camera module mounted within a chilled chamber, the method comprising:

• initiating a continuous anti-fog capture sequence at the camera module;
• receiving a static image signal from the camera module during the continuous anti-fog capture sequence;
• discarding the received static image signal;
• alternating to an open-door capture sequence from the continuous anti-fog capture sequence at the camera module;
• recording an image signal from the camera module during the open-door capture sequence;
• and
• detecting an elevated image value in the received static image signal,
• wherein alternating to the open-door capture sequence is in response to detecting the elevated image value in the received static image signal during the continuous anti-fog capture sequence.

A method of operating a refrigerator appliance comprising a camera module mounted within a chilled chamber, the method comprising:

• initiating a continuous anti-fog capture sequence at the camera module;
• receiving a static image signal from the camera module during the continuous anti-fog capture sequence;
• discarding the received static image signal;
• alternating to an open-door capture sequence from the continuous anti-fog capture sequence at the camera module;
• and
• recording an image signal from the camera module during the open-door capture sequence;
• receiving a pair of sequential image signals from the camera module during the continuous anti-fog capture sequence;
• and
• detecting a change in pixels between the pair of sequential image signals,
• wherein alternating to the open-door capture sequence is in response to detecting the change in pixels between the pair of sequential image signals during the continuous anti-fog capture sequence.