Results 261 to 270 of about 3,337,138 (296)
Some of the next articles are maybe not open access.
A laser speckle reduction system
SPIE Proceedings, 2011Speckle degrades the contrast of the fringe patterns in laser interferometers that measure rough objects. In this paper, we describe a speckle reduction system that can be used with high speed cameras to increase the frame rates of the interferometer and creates less vibration in the system.
Joshua M. Cobb, Paul Michaloski
openaire +1 more source
On the Convex Model of Speckle Reduction
2018Speckle reduction is an important issue in image processing realm. In this paper, we propose a novel model for restoring degraded images with multiplicative noise which follows a Nakagami distribution. A general penalty term based on the statistical property of the speckle noise is used to guarantee the convexity of the denoising model.
Faming Fang, Yingying Fang, Tieyong Zeng
openaire +1 more source
Speckle Reduction by Unidirectional Averaging
Optica Acta: International Journal of Optics, 1975It is shown that for the holographic reconstruction of diffuse objects the use of a vibrating coherent source decreases the contrast of the speckle pattern, and that for certain classes of objects resolution is not affected. This is true in particular for grating-like objects when the source is vibrated in a direction parallel to the lines of the ...
openaire +1 more source
Speckle reduction of ultrasound images
Proceedings of the First Joint BMES/EMBS Conference. 1999 IEEE Engineering in Medicine and Biology 21st Annual Conference and the 1999 Annual Fall Meeting of the Biomedical Engineering Society (Cat. No.99CH37015), 2003We describe a method to reduce speckles of ultrasound images. We first segment an ultrasound image with speckle segmentation algorithm. We compute an adjacency graph representation of the speckles. For each speckle region, we compute its area, mean and variation.
openaire +1 more source
Speckle reduction in laser projection based on a rotating ball lens
Optics and Laser Technology, 2021Yuwei Fang, Hai Ming, Linxiao Deng
exaly
Frequency Compounding for Speckle Contrast Reduction in Phased Array Images
Ultrasonic Imaging, 1982Olaf von Ramm, F L Thurstone
exaly +2 more sources
Speckle reduction in optical coherence tomography images using digital filtering
Journal of the Optical Society of America A: Optics and Image Science, and Vision, 2007Aydoğan Özcan, Adrien E Desjardins
exaly