Patent ID: 11930286
Assignee: ASELSAN ELEKTRONIK SANAYI VE TICARET ANONIM SIRKETI
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A method to determine an optical path maintenance need before any critical failure in an operation of an electro-optical system with a fix focus, comprising:
examining differences between pixel-wise offset values of one or more pixels in a 2 point Non-Uniformity Correction (NUC) and pixel-wise offset values of the same one or more pixels in a 1 point NUC to detect defocusing,
checking a number of bad pixels and bad pixel clusters after the 1 point NUC is applied to identify a 2 point NUC table update need and a Bad Pixel Replacement (BPR) table update need due to a change in detector characteristics, and
detecting a maintenance need if a width of a pixel-wise offset difference histogram is greater than a predefined threshold or the number of the bad pixels and the number and a size of the bad pixel clusters increase.