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Differential Video Noise Estimation
2006 International Conference on Communication Technology, 2006In this paper, we propose a fast and reliable white- noise variance estimation. The method subtracts two sequential frames of video first and then finds intensity-homogeneous blocks in both original image and differential image, and at last estimates the noise variance in these blocks by a Gaussian weighted averaging process.
Zhu Lei, Xu Peixia
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2014 19th International Conference on Digital Signal Processing, 2014
Video halftoning is a technology used to render a video onto a display device that can only display limited number of levels. Conventional video halftoning algorithms produce blue noise video halftones which are prone to flickering. Dedicated deflickering processes are hence required to reduce flickering.
Yik-Hing Fung, Yuk-Hee Chan
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Video halftoning is a technology used to render a video onto a display device that can only display limited number of levels. Conventional video halftoning algorithms produce blue noise video halftones which are prone to flickering. Dedicated deflickering processes are hence required to reduce flickering.
Yik-Hing Fung, Yuk-Hee Chan
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Compression noise based video forgery detection
2014 IEEE International Conference on Image Processing (ICIP), 2014Intelligent video editing techniques can be used to tamper videos such as surveillance camera videos, defeating their potential to be used as evidence in a court of law. In this paper, we propose a technique to detect forgery in MPEG videos by analyzing the frame's compression noise characteristics.
Hareesh Ravi +3 more
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Channel noise and correlation noise of video sequences in distributed video coding
2011 21st International Conference on Noise and Fluctuations, 2011Distributed video coding (DVC) is defined such as a correlated video sequence is transmitted via the distributed independent encoders, and it can be decoded conditionally at the decoder. In the DVC coding, if an encoder encodes the video frame X and the side information Y is at the decoder, where the side information is computed using the adjacent ...
K. Thambu, X. N. Fernando, L. Guan
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Comfort noise for compressed video
2005 Digest of Technical Papers. International Conference on Consumer Electronics, 2005. ICCE., 2005Similar to adding a dither signal to still images to hide contouring, a dither signal may be added to decompressed video prior to display to hide video compression artifacts such as blockiness. We propose that the added "comfort noise" be temporally correlated to reduce the perceived noisiness.
J.M. Boyce, A.M. Tourapis
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Adaptive surveillance video noise suppression
2011 24th Canadian Conference on Electrical and Computer Engineering(CCECE), 2011We propose an adaptive surveillance video noise filter (ASVNF) using models for marginal distributions of wavelet coefficients. In order to suppress mixture Poisson-Gaussian noise for surveillance video, the wavelet domain based denoising function in the ASVNF adapts its output to the local spatial video structure and the property of the video noise ...
Zhengya Xu +3 more
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Noise measurement in video images
2000 Digest of Technical Papers. International Conference on Consumer Electronics. Nineteenth in the Series (Cat. No.00CH37102), 2002Many image enhancement algorithms easily fail in the presence of noise. Noise adaptive algorithms are much more robust, and a good and accurate enough algorithm for noise measurement is a key component. The proposed algorithms combine good performance with low complexity.
C. Hentschel, null Haiyan He
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Modeling of Surveillance Video Noise
Signal Processing, Pattern Recognition, and Applications / 722: Computer Graphics and Imaging, 2011This paper aims at breaking new ground in modeling and estimation of recording noise of surveillance video for further development of new techniques to restore video images. In order to tackle the video denoising problem with non-stationary image contents and various noise sources, a critical task is estimation of varieties of noise in video signals ...
Zhengya Xu +3 more
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Noise Estimation in Video Surveillance Systems
2009 WRI World Congress on Computer Science and Information Engineering, 2009Noise estimation plays an important role in the evaluation of video quality. In video surveillance systems, noise is mainly introduced by the camera and the quantization process. This paper proposes a method to estimate the noise in video communication systems.
Li Jin-chao, Tang Hui-ming, Lu Chao
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Video Noise Reduction In Telecine Systems
SPIE Proceedings, 1989A telecine is a motion picture scanner used to generate high quality video recordings of motion pictures. The noise characteristics of a telecine system were analyzed to determine a suitable scheme for reducing video noise across non-moving portions of a temporal sequence of images. It was found that while in principle median filtering is better than a
Glenn Kennel, Mysore Raghuveer
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