Addressing Problems with Scene-Based Wave Front Sensing

Chan, C

Lawrence Livermore National Laboratory

关键词: Statistics;    Mirrors;    42;    Optics;    Detection;   

DOI  :  10.2172/15004550
RP-ID  :  UCRL-ID-154781
RP-ID  :  W-7405-ENG-48
RP-ID  :  15004550

美国|英语

来源: UNT Digital Library

【 摘 要 】

Scene-Based Wave Front Sensing uses the correlation between successive subimages to determine phase aberrations which blur digital images. Adaptive Optics technology uses deformable mirrors to correct for these phase aberrations and make the images clearer. The correlation between temporal subimages gives tip-tilt information. If these images do not have identical image content, tip-tilt estimations may be incorrect. Motion detection is necessary to help avoid errors initiated by dynamic subimage content. In this document, I will discuss why edge detection fails as a motion detection method on low resolution images and how thresholding the normalized variance of individual pixels is successful for motion detection.