@inproceedings{725a37d19d374745879edc3285fd9509,
title = "High contrast imaging in the presence of a bright background",
abstract = "An adaptive spatial filtering technique is described for enhancing image contrast of objects viewed against the background of an intense light source, both in the transmitting and reflecting imaging modes. The spatial distribution of the source captured in the back focal plane of the imaging lens corresponds to the angular distribution of the source. The measured distribution of energy is used to adaptively control the transmittance of a spatial light modulator positioned in the back focal plane of the imaging lens. The spatial light modulator blocks the transmission of the high energy hot spots through to the image plane. Subsequently the image formed by the objective lens is free of the bright background. Thus, the digital image capture system can use the full dynamic range of the detector and the analog to digital converter, giving rise to a captured image with the highest contrast possible. Contrast enhanced images of MEMS accelerometer are presented.",
keywords = "bright field imaging, Fourier optics, image contrast, optical signal processing",
author = "Dhadwal, \{Harbans S.\} and Jahangir Rastegar and Dake Feng",
note = "Publisher Copyright: {\textcopyright} 2015 SPIE.; Dimensional Optical Metrology and Inspection for Practical Applications IV ; Conference date: 20-04-2015 Through 21-04-2015",
year = "2015",
doi = "10.1117/12.2177506",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Song Zhang and Toru Yoshizawa and Harding, \{Kevin G.\}",
booktitle = "Dimensional Optical Metrology and Inspection for Practical Applications IV",
}