Abstract preview: A practical method for creating a high dimensional index structure that adapts to the data distribution and scales well with the database size, is presented. Typical media descriptors, such as texture ... more

Abstract preview: A system for capturing panoramic video and a novel method for corresponding compressed domain virtual camera control is presented. It targets applications such as classroom lectures and video conferen ... more

Abstract preview: This work presents a novel approach to content-based image retrieval in categorical multimedia databases. The images are indexed using a combination of text and content descriptors. The categories are ... more

Abstract preview: A novel motion activity descriptor and its extraction from a compressed MPEG (MPEG-1/2) video stream are presented. The descriptor consists of two parts, a temporal descriptor and a spatial descriptor ... more

Abstract preview: A novel method for region of interest tracking and recording video is presented. The proposed method is based on the FlyCam system 4, which produces high resolution and wide-angle video sequences by s ... more

Abstract preview: This paper presents a new technique based on anisotropic diffu-sion for segmenting color images. This operation is accomplished through two independent anisotropic diffusion processes: one in-volving ... more

Abstract preview: This paper presents a new technique for segmenting images only on the basis of color information. It is shown how segmentation can bene t from splitting color signals into chromatic and achromatic cha ... more

Abstract preview: A new method for unsupervised segmentation of color-texture regions in images and video is presented. This method, which we refer to as JSEG, consists of two independent steps: color quantization a ... more

Abstract preview: MPEG7 standardization work has started with the aims of providing fundamental tools for describing multimedia contents. MPEG7 defines the syntax and semantics of descriptors and description schemes so ... more

Abstract preview: This paper presents an overview of color and texture descriptors that have been approved for the Final Committee Draft of the MPEG-7 standard. The color and texture descriptors that are described in t ... more

Abstract preview: Object based representations of image data enable new content- related functionalities while facilitating management of large image databases. Developing such representations for multi-date and multi- ... more

Abstract preview: In this work, the coding bit rate R is considered as a function of Rho which is the percentage of zeros among the quantized DCT coefficients. We discover that the rate function R(Rho) has some very in ... more

Abstract preview: Let Rho be the percentage of zeros among the quantized transform coefficients. We discover that, in any typical video coding systems, there is always a strictly linear relationship between Rho and the ... more

Abstract preview: We present a novel source modeling framework in this paper. With the proposed source model, we can estimate the rate-distortion(R-D) curve before quantization and coding for DCT-based still images an ... more

Abstract preview: Peer group image processing identifies a "peer group" for each pixel and then replaces the pixel intensity with the average over the peer group. Two parameters provide directly control over ... more

Abstract preview: One fundamental problem in predicting the subjective quality of a degraded video is that the perceived quality depends on the properties of the video itself, or the context of the degradation. In th ... more

Abstract preview: A compact color descriptor and an efficient indexing method for this descriptor are presented. The target application is similarity retrieval in large image databases using color. Colors in a given re ... more

Abstract preview: In this papaer, we propose a very simple image compression scheme, The proposed coding scheme employs the multi-level dyadic wavelet decompositoin, linear quantization with a proper dead zone, and th ... more

Abstract preview: By introducing the concepts of characteristic rate curves and rate curve decomposition, a novel framework for rate-distortion (R-D) analysis and source modeling is developed in this work. With this ... more

Abstract preview: With blockwise binary classification and data partitioning, we convert the image subbands to the type of data for which the trellis coded quantization(TCQ) has the best quantization performance. Comp ... more

Abstract preview: Image texture is useful in image browsing, search and retrieval. A texture descriptor based on a multiresolution decomposition using Gabor wavelets is proposed. The descriptor consists of two parts: ... more

Abstract preview: The signal-dependent rank order mean (SD-ROM) filter is effective at removing high levels of impulse noise from 2- D scalar-valued signals. Excellent results have been presented for both a two-state a ... more

Abstract preview: Dimensionality reduction methods are of interest in applications such as content based image and video retrieval. In large multimedia databases, it may not be practical to search through the entire da ... more

Abstract preview: Uniformly quantized wavelet coefficients are first partitioned into multiscale blocks. Each block is classified either as an all-zero block or a non-zero block. A new method called zero mapping is pr ... more

Abstract preview: In wavelet image compression, all information loss occurs during quantization. Based on the property of bi-orthogonal wavelets, optimal 2-D quantization error feedback filters are designed to reduce ... more

Abstract preview: A novel boundary detection scheme based on "edge flow" is proposed in this paper. This scheme utilizes a predictive coding model to identify the direction of change in color and texture at ... more

Abstract preview: Digital data hiding is a technology being developed for multimedia services, where significant amounts of secure data is invisibly hidden inside a host data source by the owner, for retrieval only by ... more

Abstract preview: Many approaches have been proposed recently for estimating the perceived fidelity of digitally compressed and reconstructed video clips. Several metrics rely on the accurate estimation of detection ... more

Abstract preview: Segmentation is the low-level operation in image processing which partiotions an image into disjoint and homogeneous regions. In this paper, we consider segmentation of color images, a task which pla ... more

Abstract preview: We propose a video data embedding scheme in which the embedded signature data is reconstructed without knowing the original host video. The proposed method enables high rate of data embedding and is r ... more

Abstract preview: This paper presents an algorithm for unsupervised segmentation of color images. The main idea behind it is the use of the low-frequency content of images which allows for smoothing of segments and sha ... more

Abstract preview: It is well known that mean square error(MSE) is not preserved under non-orthogonal transformations. This poses a significant challenge to quantize the subband signals in coders that involve non-ortho ... more

Abstract preview: Wavelet and tree-structured filter bank based coding schemes find application in a number of image coding algorithms. The efficiency of such coding schemes can be enhanced further by adapting the par ... more

Abstract preview: A number of techniques have been proposed for the design of tree-structured filter banks matched to the statistics of the input signal. Amongst all of the porposed techniques, a top-down design appr ... more

Abstract preview: A new texture feature extraction method utilizing dual tree complex wavelet transform (DT-CWT) is introduced. The complex wavelet. transform is a recently developed tool that uses a dual tree of wavel ... more

Abstract preview: A vector enhancement of Said and Pearlman's Set Partitioning in Hierarchical Trees (SPIHT) methodology, named VSPIHT, has recently been proposed for embedded wavelet image compression. A major ad ... more

Abstract preview: This paper presents an algorithm for constructing object representations suitable for recognition. The system automatically selects a representative subset of the views of the object while constructin ... more

Abstract preview: In this work, we present an original technique for unsupervised segmentation of color images which is based on an extension, for an use in the u' v' chromaticity diagram, of the well-known ... more

Abstract preview: One well-studied image processing task is the remova l of impulse noise from images. Impulse noise can be introduced during image capture, during transmission, or during storage. The signal-dependent ... more

Abstract preview: Image texture is an important visual primitive in image search and retrieval applications. To characterize texture information of images, a texture descriptor is proposed to capture both the perceptua ... more

Abstract preview: In the first part of this work, peer group filtering(PGF), a nonlinear algorithm for image smoothing and impulse noise removal in color images is presented. The algorithm replaces each image pixel wi ... more

Abstract preview: In this work, a new approach to fully automatic color image segmentation, called JSEG, is presented. First, col-ors in the image are quantized to several representing classes that can be used to diffe ... more

Abstract preview: We present here an implementation of NeTra, a prototype image retrieval system that uses color, texture, shape and spatial location information in segmented image regions to search and retrieve simila ... more

Abstract preview: vector enhancement of Said and Pearlman's Set Partitioning in Hierarchical Trees (SPIHT) methodology, named VSPIHT, has recently been proposed for embedded wavelet image compression. While the VS ... more

Abstract preview: In this work, an efficient low-dimensional color indexing scheme for region-based image retrieval is presented. The colors in each image region are first quantized so that only a small number of clust ... more

Abstract preview: A method of rotation-invariant texture classification based on a complete space-frequency model is introduced. A polar, analytic form of a two-dimensional (2-D) Gabor wavelet is developed, and a multi ... more

Abstract preview: A new technique for embedding image data that can be recovered in the absence of the original host image, is presented. The data to be embedded, referred to as the signature data, is inserted into t ... more

Abstract preview: One well-studied image processing task is the removal of impulse noise from images. Impulse noise can be introduced during image capture, during transmission, or during storage. The signal-dependent ... more

Abstract preview: A vector extension of the Set Partitioning in Hierarchical Trees (SPIHT) algorithm, named vector-SPIHT (VSPIHT), using trained classified successive refinement VQ, has recently been proposed. In this ... more

Abstract preview: We develop a new approach for the design of two-channel perfect reconstruction (PR) filter banks that yield low system delay. The proposed design procedure is based on the ideaa of starting with triv ... more

Abstract preview: An object-based representation for video data can facilitate video search and content analysis. Detecting physical meaningful video object is a challenging open issue, and requires intelligent spatio ... more

Abstract preview: While lattice vector quantization (LVQ) can solve the complexity problem of LBG based vector quantizers, and also yield very general codebooks, a single stage lattice VQ, when applied to high variance ... more

Abstract preview: This paper describes a robust data embedding scheme which uses noise resilient channel codes based on multidimensional lattice structures. Compared to prior work in digital watermarking, the propose ... more

Abstract preview: A new lossless image compression method for progressive-resolution transmission of color images is proposed. It is based on spatial and spectral transforms. Reversible wavelet transforms are performed ... more

Abstract preview: A general variational framework for image approximation and segmentation is introduced. By using a continuous "line-process" to represent edge boundaries, it is possible to formulate a varia ... more

Abstract preview: In this paper, we propose a new technique for the design of two-channel perfect reconstruction filter banks (PRFBs). The proposed design approach is generic, and can be applied to the design of both ... more

Abstract preview: We present here a prototype video analysis and retrieval system, called NeTra-V, that is being developed to build an object-based video representation for functionalities such as search and retrieval ... more

Abstract preview: This paper presents a study of different methods of using incremental evolution with genetic programming. Incremental evolution begins with a population already trained for a simpler but related task. ... more

Abstract preview: Creation of digital iamge and video libraries poses several interesting and challenging problems. New tools are needed for managing such as multimedia content. These include methods to search, retriev ... more

Abstract preview: A computationally efficient algorithm is proposed to remove noise impulses from speech and audio signals while retaining its features and tonal quality. The proposed method is based on the SD-ROM(Sig ... more

Abstract preview: Set Partitioning in Hierarchical Trees (SPIHT), proposed by Said and Pearlman 1, is generally regarded as a very efficient wavelet-based still image compression scheme. The algorithm uses an efficient ... more

Abstract preview: Two new methods for computationally efficient design of two-channel quadrature mirror filter(QMF) banks based on the frequency sampling approach are introduced. In the proposed approach, the number of ... more

Abstract preview: A texture-based image retrieval system for browsing large-scale aerial photographs is presented. The salient components of this system include texture feature extraction, image segmentation and grou ... more

Abstract preview: The management of images, video, and in general, multi- media data, is an improtant issue in the design of digital libraries. In particular, the following problems stand out: efficient storage, fast r ... more

Abstract preview: We describe a data hiding technique which uses noise resilient channel codes based on multidimensional lattices. A trade-off between the quantity of hidden data and the quality of the watermarked imag ... more

Abstract preview: An approach to embedding gray scale images using a discrete wavelet transform is proposed. The proposed scheme enables using signature images that could be as much as 25% of the host image data and ... more

Abstract preview: We present here a prototype video analysis and retrieval system, called NeTra-V, that is being developed to build an object-based video representation for functionalities such as search and retrieval ... more

Abstract preview: The essential motivations, towards an object-based approach to video coding, include possible object-based interactivity and functionality, and the elimination of blocking or mosquito artifacts that ... more

Abstract preview: There has been much interest recently in image content based retrieval, with applications to digital libraries and image database accessing. One approach to this problem is to base retrieval from the ... more

Abstract preview: Image decomposition based on the discrete wavelet transform(DWT) has been proposed for efficient storage and progressive transmission of images for visual browsing in digital image libraries. Although ... more

Abstract preview: We propose a new class of mapping-based nonlinear quadratic Volterra filters for image enhancement. The input signal is mapped prior to filtering by a emoryless one-to-one nonlinear mapping function. ... more

Abstract preview: We present an implementation of a system for content- based search and retrieval of video based on low-level vision features. Currently the system consists of three parts, automatic video partition, f ... more

Abstract preview: The 1-D Teager algorithm can be used to perform mean weighted highpass filtering with relatively few operations. We propose a generalization of the Teager algorithm. The modified algorithm allows us t ... more

Abstract preview: During the past few years several interesting applications of eigenspace representation of images have been proposed. These include face recognition, video coding, and pose estimation. However, the ... more

Abstract preview: This paper examines genetic programming as a machine learning technique in the context of object detection. Object detection is performed on image features and on gray-scale images themselves, with di ... more

Abstract preview: Progressive-resolution transmission is of significant practical importance for online image libraries. When combined with reversible image compression, it provides a particularly promising framework w ... more

Abstract preview: A block filter, in general, is a linear, periodic and time-varying (LPTV) system. Under certain conditions satisfied by the transfer function matrix of the filter, the system has an alias free operat ... more

Abstract preview: A novel boundary detection scheme based on "edge flow" is proposed in this paper. This scheme utilizes a predictive coding model to identify the direction of change in color and tecture at ... more

Abstract preview: Currently there are quite a few image retrieval systems that use color and texture as features to search images. However, by using global features these methods retrieve results that often do not ma ... more

Abstract preview: In our previous work, we have developed a rate-dis-tortion (R-D) modeling framework H.263 video coding by introducing the new concepts of characteristic rate curves and rate curve decomposition. In th ... more

Abstract preview: A general variational framework for image approximation and segmentation is introduced in which the boundary function has a simple explicit form in terms of the approximation function. At the same tim ... more

Abstract preview: Image registration is one of the basic image processing operations in remote sensing. With the increase in the number of images collected every day from different sensors, automated registration of mu ... more

Abstract preview: Derivation of the Gabor Filter Dictionary parameters

Abstract preview: Image content based retrieval is emerging as an important research area with application to digital libraries and multimedia databases. The focus or this paper is on the image processing aspects and i ... more

Abstract preview: This paper addresses two important issues related to texture pattern retrieval: feature extraction and similarity search. A Gabor feature representation for textured images is proposed, and its perfo ... more

Abstract preview: Image feature detection is a fundamental issue in many intermediate level vision problems such as stereo, motion correspondence, image registration, and object recognition. In this paper we present ... more