The conventional multiview video coding (MVC) schemes, utilizing both neighboring temporal frames and view as possible references, have only shown a slight gain over those using alone in terms of efficiency. reason for this is that the exhibit stronger correlation with current frame often fail to be selected references. This paper proposes an elegant MVC framework high dimensional wavelet, which rightly matches inherent dimension property video. It also makes better usage correlations thanks...

In this paper, we propose a novel coding and transmission scheme, called LineCast, for broadcasting satellite images to large number of receivers. The proposed LineCast matches perfectly with the line scanning cameras that are widely adopted in orbit satellites capture high-resolution images. On sender side, each captured is immediately compressed by transform-domain scalar modulo quantization. Without syndrome coding, power directly allocated quantized coefficients scaling according their...

For situations where accurate attitude information is needed while the position not readily available or necessarily required, such as heading reference system, this article proposes a velocity-aided in-motion alignment scheme for strapdown inertial navigation system (SINS) during geographic latitude uncertainty. In coarse stage, gravitational apparent motion rebuilding method based on integral velocity smoothing designed to roughly determine and information. Then, SINS/velocity-integrated...

We examine the enhancement-layer rate allocation problem in progressive fine granularity scalable (PFGS) video coding. The arises from fact that different frames enhancement layer have rates PFGS A rate-distortion (R-D) function for a multiframe group is first established coding, followed by experiments to verify its validity using real test sequences. Optimal among then given based on R-D function, together with simple implementation suitable applications such as streaming video....

This paper proposes a distributed video coding scheme based on the zero tree entropy (ZTE) coding. Wyner-Ziv theory source with side information is taken as basic principle, which makes independent encoding and joint decoding possible. In this scheme, wavelet transform used to exploit spatial correlation of frame. The quantized coefficients are reorganized in terms structure so identify significant insignificant coefficients. significance map intra-codec transmitted. particular,...

While directional adaption is introduced into traditional transforms, different orders of two 1-D transforms will result in results one 2-D transform. Based upon an anisotropic image model, this paper analyzes the effect transform terms theoretical coding gain. Our reveal that have little on gain with full decomposition, good modes and interpolation. However, practical compression schemes, since high-pass bands are not decomposed fully because consideration complexity, performances, which...

For a strap-down inertial navigation system (SINS), traditional frame switching mechanization can be used to solve the all-Earth problem, however, this kind of method suffers from complex and discontinuous algorithms. On basis improving vertical channel damping technology, complete unified scheme arranged in Earth-centered Earth-fixed (ECEF) is designed as an alternative for global applications, which results simpler continuous algorithm lower computational complexity. We also propose...

We propose a novel architecture for scalable video coding, namely, progressive fine granularity (PEGS) which can provide high coding efficiency along with good bandwidth adaptation and error recovery properties. Unlike the (FGS) in MPEG-4 proposal, some of enhancement layers current frame are predicted from quality layer reference frame, rather than always base layer. Using as makes motion prediction more accurate to improve efficiency. On other hand, use multiple different references may...

Cloud obstacles obscure ground information frequently during remote sensing imaging which leads to valuable losses. Removing clouds from a single image becomes challenging since no reference images containing cloud-free regions are available. In order study cloud removal technologies and evaluate their performances, method simulate evenly unevenly distributed was proposed by analyzing the physical model of imaging. Dual tree complex wavelet transform (DTCWT) its features were introduced...

This paper proposes a Wyner-Ziv (WZ) switching scheme for multiple bit-rate (MBR) video streaming over networks. Identical content is encoded into set of normal streams, which are generated by conventional hybrid coding with bit rates, so that can dynamically switch among these streams according to available bandwidth. At encoder side, the WZ codec generates stream compressing reconstructed frames certain will be switched to, no matter it switches from. decoder same frame, used reconstruct...

Because the accuracy of existing airborne navigation is lacking in polar region, it difficult to ensure safety and reliability aircraft when flying over region. The integrated system based on inertial technology uses multi-information fusion assist collaborative obtain an indirect grid algorithm that combines azimuth solve problems. This paper analyzes principle semiphysical simulation experiments are carried out by using theory background engineering, accuracies frame region middle low...

We propose an efficient and flexible coding scheme inspired by the SP picture technique in H.26L TML; it can achieve drift-free bitstream switching at predictive frames. Firstly, proposed improves efficiency of frames TML (1) reducing number quantization modules encoding path; (2) eliminating mismatch between references for prediction reconstruction; (3) outputting a high quality image display purpose before step reconstruction loop. Secondly, allows independent parameters up-switching...

This paper presents a 3-D shape-adaptive directional wavelet coding technique for object-based scalable video coding. includes threading and extensions of weighted adaptive lifting (WAL) scheme. The threading, which unifies the concept temporal motion 2-D spatial provides opportunities to align series object planes form exploit spatio-temporal correlation inside object. WAL scheme, is extended from frame-based image coding, employed decompose into multispatio-temporal resolution pyramid...

We propose a new error concealment method based on hallucination for Scalable Video Coding with spatial scalability. In this method, parts of the frames which lose enhancement layer are up-sampled from base and "hallucinated" as frames. The database is generated high-resolution low-resolution frame-pairs near lost in video sequence. effectiveness here lies similarity between nearby Experiments show that proposed has superior results over state-of-the-art spatially Coding.

In this paper, we propose a novel rate allocation method for compound image coding using Quality-biased Rate-Distortion Optimization (QRDO) technique to enhance visual quality. The is divided into 16 times blocks, which are further classified four types: smooth, text/graphics, continuous tone and hybrid blocks. Four carefully designed approaches according different statistical features introduced compress them, rate-distortion tradeoff with QRDO considered decide approach should be used each...

Compressed sensing theory supposes that a sparse signal can be sampled at rate much lower than the Nyquist–Shannon and reconstructed with high probability. Such sampling commonly requires finding set of optimal basis functions to sparsely represent first. This paper provides simple effective working process select for family pulsed radar echoes. The selection is performed in two steps. First,the waveform matching based on known array excitation carried out mother function from wavelet...

Modern space vehicles face the challenges to obtain more and accurate attitudes in order complete demanding tasks. Onboard star sensors which identify observed stars field of view according loaded guide catalog output attitude have attracted most interests. Guide are usually required distribute uniformly on celestial sphere improve performance pattern identification. An optimal selection algorithm is proposed achieve an even distribution this paper. Constellation features discussed. The mean...

A new method of three-dimensional (3D) image optical encryption based on phase-shifting compressive Fresnel holography (PSCFH) is presented. In the step, 3D object encrypted with random phase masks using interferometry to record three intensity images different phase-shifting. decryption three-step technique first used extract complex field at recording plane. Finally, reconstructed from recovered correct key. Numerical experiments demonstrate feasibility and robustness our proposed PSCFH method.

The increasing complexity of modern very-large-scale integration (VLSI) design highlights the significance Electronic Design Automation (EDA) technologies. Chip placement is a critical step in EDA workflow, which positions chip modules on canvas with goal optimizing performance, power, and area (PPA) metrics final designs. Recent advances have demonstrated great potential AI-based algorithms enhancing placement. However, due to lengthy workflow design, evaluations these often focus...

Star trackers determine attitude by identifying stars imaged on the image sensor via an optical system whose performance is required to meet star identification algorithm. The method parameters of proposed based These include focal length, aperture, and field view (FOV). Aberration correction requirements are also analyzed. Pyramid algorithm utilized in this paper investigated. Some improved approaches presented for map processing, onboard catalog organization identification. A link table...