International Symposium on VIPromCom Video/Image Processing and Multimedia Communications
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Blind watermarking method using partitioned DCT channels
- Trang 245-250
A novel blind watermarking method for 8 bit grayscale images in 8/spl times/8 block DCT (discrete cosine transform) domain is presented. The method is based on an advanced spread-spectrum algorithm (see Cox, I.J. et al., NEC Research Institute Technical Report p.95-100, 1995). However, instead of correlation analysis in the detection phase, it extracts the difference between the histogram properti......
#Watermarking #Discrete cosine transforms #Histograms #Gray-scale #Spread spectrum communication #Partitioning algorithms #National electric code #Writing #Phase detection #Security
Complex genomic signals
- Trang 19-24
An original tetrahedral representation of the genetic code (GC) is presented. It is shown that the dimensionality of the genomic signal representation can be reduced by projecting the genetic code tetrahedron on an adequately oriented plane, leading to the complex representations of the GC. On these bases, optimal symbolic-to-digital mappings of the linear, one-dimensional and one-directional stra......
#Genomics #Bioinformatics #Genetics #Signal representations #Lead compounds #Signal mapping #Amino acids #Signal processing #Digital signal processing #Signal analysis
Tracking moving objects with co-evolutionary snakes
- Trang 325-332
A new symbiotic genetic algorithm (SGA) based active contour model (snake) is proposed to track the B-spline contour of obstacles. It exploits the local control properties of the B-spline to decompose the contour into subcontours and optimizes each subcontour in separate genetic algorithms (GA). Unlike the GA-based snake, an SGA snake can track the obstacle's outline more robustly. Application-spe......
#Spline #Genetic algorithms #Symbiosis #Active contours #Deformable models #Shape control #Noise robustness #Robust stability #Control system synthesis #Combinatorial mathematics
Simplified Boolean LUM smoothers
- Trang 159-162
The field of the research related to the implementation of nonlinear order-statistic filters through their equivalent expression by positive Boolean functions (PBF) lies in the conversion between the traditional filtering functions and their corresponding PBF. In the case of the order-statistic LUM smoothers, the complexity of minimal PBF depends on a smoothing parameter and window size. In order ......
#Filters #Smoothing methods #Statistics #Filtering #Multimedia communication #Boolean functions #Electronic mail #Attenuation #Stacking #Region 8
Motion compensated multimode video coding for noisy channels
- Trang 279-282
Images with rapid motion are more or less degraded at low bit rate transmission. Hence a motion compensation technique is implemented to improve the coding efficiency. Performance in terms of bit rate is compared between motion compensated and nonmotion-compensated multimode video coding. Multimode video coding optimizes the tradeoff between the conflicting objectives of high compression ratio and......
#Video coding #Motion estimation #Motion compensation #Videoconference #Video compression #Bit rate #Image coding #Video sequences #Degradation #Resilience
Combating geometrical attacks in a DWT based blind video watermarking system
- Trang 263-266
This paper describes a high capacity blind video watermarking system invariant to geometrical attacks such as shift, rotation, scaling and cropping. A spatial domain reference watermark is used to obtain invariance to geometric attacks by employing image registration techniques to determine and invert the attacks. A second, high capacity watermark, which carries the data payload, is embedded in th......
#Discrete wavelet transforms #Watermarking #Image registration #Payloads #Wavelet domain #Humans #Visual system #Protection #Error correction codes #Turbo codes
Study on transforming from painting to music
- Trang 117-120
This paper aims at probing into the mapping relationship and rules between painting and music. After the examination of corresponding relation between image and music, relevant arithmetic is put forward in accordance with certain principles in scientific and art, in which the original information in the image is converted into musical information, thus enabling people to obtain visual impression f......
#Painting #Multiple signal classification #Music #Art #Image converters #Computer graphics #Rhythm #Concrete #Arithmetic #History
The E-Learning & Consulting service based on the converged IN and IP networks
- Trang 15-18
This paper describes a multimedia service, E-Learning & Consulting, which exploits integration between INs and IP-based networks. The first section introduces a theme of convergence of telecom and data networks. The second section presents current technology and services based on converged technology. The last and the most important part illustrates a basic fact about our multimedia service, E-Lea......
#Electronic learning #Intelligent networks #IP networks #Asynchronous transfer mode #Next generation networking #Web and internet services #Telecommunications #Communication industry #Communications technology #Circuits
Image segmentation and classification using color features
- Trang 57-64
Color provides a wealth of information for interpretation of image content. The increased availability of affordable digital color cameras has created the opportunity to explore the degree to which color is useful in computer vision. This paper shows that a system for image segmentation and classification can be created using color as the primary feature. This system is comprised of two phases: se......
#Image segmentation #Image databases #Computer vision #Spatial databases #Laboratories #Intelligent systems #System testing #Digital cameras #Detection algorithms #Image recognition
Modified SPIHT algorithm for wavelet packet image coding
- Trang 189-194
SPIHT is a very efficient image compression algorithm that is based on the idea of coding groups of wavelet coefficients as zerotrees. This method is well suited for the dyadic wavelet transform, where child-parent relations are easily established. In this paper we investigate how the SPIHT algorithm can be used for any arbitrary wavelet packet basis.
#Wavelet packets #Image coding #Entropy #Quantization #Discrete transforms #Cost function #Wavelet transforms #Discrete wavelet transforms #Energy measurement #Transform coding