Proceedings 2001 International Conference on Image Processing (Cat. No.01CH37205)

7-10 Oct. 2001

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  • Proceedings 2001 International Conference On Image Processing [front matter]

    Publication Year: 2001, Page(s):i - lxx
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  • Memory hierarchy exploration for low power architectures in embedded multimedia applications

    Publication Year: 2001, Page(s):326 - 329 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (356 KB) | HTML iconHTML

    Multimedia applications are characterized by an increased number of data transfer and storage operations due to real time requirements. Appropriate transformations can be applied at the algorithmic level to improve crucial implementation characteristics. The effect of the data-reuse transformations on power consumption, area and performance of multimedia applications realized on embedded cores is ... View full abstract»

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  • Error-resilient mobile video by edge adapted multiscale transforms

    Publication Year: 2001
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (73 KB) | HTML iconHTML

    Summary form only given, as follows. Mobile video systems face particularly challenging problems due to the hostile nature of the mobile radio channel and the very low bit-rate available. For the fading channel, the Shannon separation principle does not hold, and hence source and channel coding should be considered jointly. This talk reviews some advances in our work on joint optimization of video... View full abstract»

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  • Performance comparison of MPEG-4 scalable and non-scalable video streaming

    Publication Year: 2001
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    Summary form only given, as follows. We first show that 3G wireless multimedia systems adopting scalable video encoding can achieve higher overall network utilization. Moreover, the problems of both packet loss and player rebuffering can degrade wireless streaming performance if the streaming video is non-scalable due to fading/retransmission and multi-user sharing. We demonstrate that these probl... View full abstract»

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  • Wireless video-do standards matter?

    Publication Year: 2001
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (40 KB)

    Summary form only given, as follows. It is usually assumed that standards are an essential prerequisite for the exchange of various types of data, not least video. For as long as codecs have necessarily been implemented in dedicated hardware this has been true. Now, however, the ground-rules are changing rapidly. General-purpose processors are becoming more powerful but less power hungry. Java is ... View full abstract»

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  • Visualization and navigation in image database applications based on MPEG-7 descriptors

    Publication Year: 2001
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (31 KB)

    Summary form only given, as follows. The MPEG-7 standard is currently being developed to specify standardized interfaces that help users or agents to identify, filter, browse and efficiently retrieve audio-visual material. The purpose of the presentation is to provide an overview of the scope and potential of the MPEG-7 standard, with particular emphasis on no-text descriptors for visual content. ... View full abstract»

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  • Author index

    Publication Year: 2001, Page(s):1111 - 1127
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    Freely Available from IEEE
  • Hierarchical motion compensation with spatial and luminance transformations

    Publication Year: 2001, Page(s):518 - 521 vol.3
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB) | HTML iconHTML

    We present a new method for motion compensation, which combines transformations in the spatial and luminance domains. In most standardised video compression algorithms, motion information is assumed to be translation only, as used by the traditional block matching algorithm (BMA). Such an assumption is not always correct, as in most scenes, namely head and shoulders, object motions are rotations a... View full abstract»

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  • A rate control method with preanalysis for real-time MPEG-2 video coding

    Publication Year: 2001, Page(s):514 - 517 vol.3
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB) | HTML iconHTML

    This paper proposes a bit rate control method with a preanalysis for real-time MPEG-2 video coding. The rate control method allocates bits to pictures according to picture coding complexities obtained from the preanalysis. The bit allocation is adjusted to satisfy the VBV constraints. The method is evaluated by MPEG-2 video encoding experiments for sequences whose characteristics significantly cha... View full abstract»

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  • Generalized partial distortion search algorithm for block-matching motion estimation

    Publication Year: 2001, Page(s):510 - 513 vol.3
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (520 KB) | HTML iconHTML

    Quality against speed control for real-time video applications, such as low-bit-rate video conferencing or high quality video entertainment, is usually absent from many traditional fast block motion estimators. A novel block-matching algorithm for fast motion estimation, named generalized partial distortion search algorithm (GPDS), is proposed. It uses a halfway-stop technique with progressive par... View full abstract»

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  • N-dimensional zonal algorithms. The future of block based motion estimation?

    Publication Year: 2001, Page(s):506 - 509 vol.3
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (448 KB) | HTML iconHTML

    The popularity of zonal based algorithms for block based motion estimation has been increasing due to their superior performance in both terms of reduced complexity and superior quality versus other preexisting algorithms. In our previous work we mainly focused on generalizing the different parameters used in these algorithms and finding the possibly most efficient implementation. In this paper a ... View full abstract»

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  • Lossless compression of bi-level images based on context selection and hierarchical enumerative coding

    Publication Year: 2001, Page(s):438 - 441 vol.3
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (248 KB) | HTML iconHTML

    We propose a lossless compression algorithm for bi-level images based on context selection and hierarchical enumerative coding. To exploit inter-pixel correlation in an image, a context that is calculated from coded pixels is obtained to rearrange a 2-D image to a 1-D binary string, and the resulting 1-D sequence undergoes hierarchical enumerative coding. The proposed method attains performance si... View full abstract»

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  • A spectral method for solving elliptic equations for surface reconstruction and 3D active contours

    Publication Year: 2001, Page(s):1067 - 1070 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (320 KB) | HTML iconHTML

    The solution of elliptic partial differential equations arises in 3D surface reconstruction and active contours. Most current approaches are iterative including finite element methods (FEM) and finite difference methods (FDM). We describe a fast spectral method for solving elliptic equations over the unit sphere. A double Fourier series expansion is applied to model convex or star-shaped 3D surfac... View full abstract»

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  • An object based motion method for video coding

    Publication Year: 2001, Page(s):502 - 505 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (344 KB) | HTML iconHTML

    In order to improve efficiency of video coding, temporal redundancy between neighboring frames can be reduced. In MPEG-2, some frames, named interframes, are predicted using a motion estimation based on the conservation of intensity over time. In the new standard MPEG-4, frames are separated into several objects that are transmitted separately. Therefore, the prediction has to be performed on obje... View full abstract»

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  • JPEG-matched MRC compression of compound documents

    Publication Year: 2001, Page(s):434 - 437 vol.3
    Cited by:  Papers (9)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (528 KB) | HTML iconHTML

    Mixed raster content (MRC) is an ITU document compression standard (T.44) specifying both a model for multilayer representation of a compound document, and a set of allowable standardized coders for the individual layers. The model requires decomposition of a document into two image layers and a binary mask layer, but the standard does not recommend any procedure for this task. For best compressio... View full abstract»

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  • Semi-automatic segmentation of vessels by mathematical morphology: application in MRI

    Publication Year: 2001, Page(s):1063 - 1066 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (304 KB) | HTML iconHTML

    We propose a semi-automated method to isolate vessels or other structures from magnetic resonance imaging acquisitions. This method is divided into two parts. The first part is a nonlinear filter, using morphological operators, based on the invariance properties of the image. The second consists of finding the extrema contours. The contour which is proposed here is called the virtual contour, beca... View full abstract»

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  • Image enhancement segmentation and denoising by time dependent nonlinear diffusion processes

    Publication Year: 2001, Page(s):134 - 137 vol.3
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB) | HTML iconHTML

    Two nonlinear diffusion processes with time-dependent diffusion coefficients are presented. Both processes converge to nontrivial solutions, eliminating the need to impose an arbitrary diffusion stopping time, otherwise required in the implementation of most nonlinear diffusion processes. The two schemes employ nonlinear cooling mechanisms that preserve edges. One scheme is intended for general de... View full abstract»

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  • Shadows and highlights detection in 4-source colour photometric stereo

    Publication Year: 2001, Page(s):967 - 970 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB) | HTML iconHTML

    The photometric stereo technique (PS) has been used for shape recovery for quite some time now. Using a modification of the method, we can recover local surface normals and surface colour from multiple images for surfaces with unspecified reflectance function. However, for adequate recovery one should be able to detect and appropriately deal with shadows and highlights in the input images. We prop... View full abstract»

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  • Simple, high performance lossless image compression

    Publication Year: 2001, Page(s):498 - 501 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (688 KB) | HTML iconHTML

    We present a two-part method for lossless image compression: the first is a simple transformation based on JPEG-LS and the second is the use of a general purpose file compressor such as gzip, bzip2 or rk. The transformation is invertible and uses only integer arithmetic. It achieves no compression directly; however, on some images, it can significantly reduce the entropy. The gzip, bzip2, and rk c... View full abstract»

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  • Rate distortion optimized document coding using resolution enhanced rendering

    Publication Year: 2001, Page(s):430 - 433 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (344 KB) | HTML iconHTML

    Raster document coders are typically based on the use of a binary mask layer that efficiently encodes the text and graphic content. While these methods can yield much higher compression ratios than natural image compression methods, the binary representation tends to distort fine document details, such as thin lines, and text edges. In this paper, we describe a method for encoding and decoding the... View full abstract»

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  • Segmentation of kidney by using a deformable model

    Publication Year: 2001, Page(s):1059 - 1062 vol.3
    Cited by:  Papers (10)  |  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB) | HTML iconHTML

    This paper presents a deformable model based approach for segmenting three dimensional (3D) anatomic volumes (such as human organs) in medical images. The deformable model is represented by non-uniform rational B-splines surface and a priori knowledge of an organs shape, such as average and variation of the shape, is introduced as energy function for the model fitting process. To describe the shap... View full abstract»

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  • Edge-enhancing super-resolution using anisotropic diffusion

    Publication Year: 2001, Page(s):130 - 133 vol.3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (392 KB) | HTML iconHTML

    This paper presents an edge-enhancing super-resolution algorithm using anisotropic diffusion technique. Because we solve the super-resolution problem by incorporating anisotropic diffusion, our technique does more than merely reconstruct a high-resolution image from several overlapping noisy low-resolution images and preserve them. In addition to reducing image noise during the restoration process... View full abstract»

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  • 2D to pseudo-3D conversion of "head and shoulder" images using feature based parametric disparity maps

    Publication Year: 2001, Page(s):963 - 966 vol.3
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (312 KB) | HTML iconHTML

    This paper presents a method of converting a 2D still photo containing the head & shoulders of a human (e.g. a passport photo) to pseudo-3D, so that the depth can be perceived via stereopsis. This technology has the potential to be included in self-serve photo booths and, also as an added accessory (i.e. software package) for digital still cameras and scanners. The basis of the algorithm is to... View full abstract»

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  • A MMSE estimate for demosaicking

    Publication Year: 2001, Page(s):358 - 361 vol.3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (240 KB) | HTML iconHTML

    Digital color cameras sample the continuous color spectrum using three or more filters; however, each pixel represents a sample of only one of the color bands. This arrangement is called a mosaic. To produce a full resolution color image, the recorded image must be processed to estimate the values of the pixels for all the other color bands. This restoration process is called demosaicking. This pa... View full abstract»

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  • Enhanced JPEG compression of documents

    Publication Year: 2001, Page(s):494 - 497 vol.3
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (568 KB) | HTML iconHTML

    The JPEG standard was designed for compression of photographic digital images, but it also works well on digitized documents with only a limited number of shades of gray. For documents in which compression and legibility are more important than preserving all of the intermediate values, preprocessing the images to reduce their dynamic range can enhance JPEG compression, as it selectively discards ... View full abstract»

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