Concept
Compression artifact
Publications associées (476)
Noise Reduction Techniques for Video Coding Applications
Granular noise is visually bothersome with respect to high quality rendition, and it is a well known source of visual artifacts for coding algorithms. This work considers the application of nonlinear filtering techniques to granular noise reduction and the ...
1998A new sampler for extracting undisturbed surface peat cores for growth pot experiments
The sampler extracts uncompressed cores of 13.3 cm in diameter, up to 70 cm long, from the surface layers of peat. It has two close-fitting concentric cylindrical tubes, the outer one acting as a cutter and the inner one as a collector. As the outer tube i ...
1998Spatio-temporal segmentation and object tracking
Visual information is taking a predominant place in our society. With the advent of digital technologies, visual information will find new applications in domains ranging from communication, commerce to entertainment. New functionalities will be required t ...
EPFL1997Discrete and Continuous Time Local Cosine Bases with Multiple Overlapping
Cosine modulated filter banks are filter banks whose impulse responses are obtained by modulating a window with cosines. Among their applications are video and audio compression and multitone modulation. Their continuous time counterpart is known as local ...
1997Adaptive scalar quantization without side information
In this paper, we introduce a novel technique for adaptive scalar quantization. Adaptivity is useful in applica- tions, including image compression, where the statistics of the source are either not known a priori or will change over time. Our algorithm us ...
1997Multi-level colour halftonning algorithms
Roger Hersch, Isaac Amidror, Patrick Emmel
Methods for the halftoning of images on multi-level printing devices such as multi-level ink-jet printers are presented. Due to the relatively large size of single droplets, halftoning algorithms are still needed. However, since halftoning occurs between t ...
SPIE-Int. Soc. Opt. Eng1997Image Compression Using Binary Space Partitioning Trees
For low bit-rate compression applications, segmentation-based coding methods provide, in general, high compression ratios when compared with traditional (e.g., transform and subband) coding approaches. In this paper, we present a new segmentation-based ima ...
1996