STRAY LIGHT COMPENSATION TECHNIQUES FOR AN INFRARED CAMERA

摘要

Various techniques are provided for a stray light compensation method for an infrared (IR) camera. For example, a stray light compensation method includes: capturing an IR image of a scene by an IR camera, generating a fixed pattern noise estimate FPNestt0 for time t0 using the captured IR image and a stray light model associated with the IR camera, and performing a fixed pattern noise (FPN) compensation of the captured IR image based on said FPNestt0 to obtain a stray light compensated IR image. The fixed pattern noise estimate may be generated through operations in a frequency domain representation of the captured IR image and the stray light model according to one or more embodiments.

主权项

1. A method comprising:
measuring stray light for a selection from an infrared (IR) image captured by an IR camera, wherein the selection includes one or more lines, one or more points, or whole of the captured IR image; low-pass filtering the measured stray light for the selection; selecting, from stored stray light images, portions that correspond to the measured stray light for the selection, wherein the stored stray light images were measured during production of the IR camera for at least two different camera temperatures against flat radiators and stored in a memory; matching the measured stray light for the selection against corresponding selections in the stored stray light images by calculating a factor which makes the most points from the selections coincide; and compensating the captured IR image with the calculated factor of the matched one of the stored stray light images.