Patent ID: 7122788

Claim:
A method for collecting a plurality of samples for adjusting a signal, comprising: providing a shutter in an opened position to substantially allow a detector of an infrared camera to detect infrared radiation comprising information about a scene; generating a signal corresponding to the infrared radiation; initiating a first touchup iteration by moving the shutter to a closed position to substantially prevent the detector from detecting the infrared radiation; collecting a plurality of first samples of a reference frame according to a collection instruction; moving the shutter to the opened position to allow the detector to detect the infrared radiation; establishing that there is a change in a state of the infrared camera from a first state to a second state; adjusting the collection instruction in response to the change; initiating a second touchup iteration by moving the shutter to the closed position; collecting a plurality of second samples of the reference frame according to the adjusted collection instruction; and determining a modification of the signal in accordance with at least one of the first samples and the second samples.