By Topic

Image Processing, IEEE Transactions on

Issue 3 • Date May 1994

Filter Results

Displaying Results 1 - 13 of 13
  • An algorithm for successive identification of reflections

    Publication Year: 1994 , Page(s): 281 - 291
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (892 KB)  

    A new algorithm for successive identification of seismic reflections is proposed. Generally, the algorithm can be viewed as a curve matching method for images with specific structure. However, in the paper, the algorithm works on seismic signals assembled to constitute an image in which the investigated reflections produce curves. In numerical examples, the authors work on signals assembled in CMP... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal parallel stack filtering under the mean absolute error criterion

    Publication Year: 1994 , Page(s): 324 - 327
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (428 KB)  

    The authors extend the configuration of stack filtering to develop a new class of stack-type filters called parallel stack filters (PSFs). As a basis for the parallel stack filtering, the block threshold decomposition (BTD) is introduced, and its properties are investigated. The design of optimal PSHs under the mean absolute error (MAE) criterion is shown to be similar to the minimum MAE stack fil... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Hidden Markov models applied to on-line handwritten isolated character recognition

    Publication Year: 1994 , Page(s): 314 - 318
    Cited by:  Papers (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (460 KB)  

    Hidden Markov models are used to model the generation of handwritten, isolated characters. Models are trained on examples using the Baum-Welch optimization routine. Then, given the models for the alphabet, unknown characters can be classified using maximum-likelihood classification. Experiments have been conducted, and an average error rate of 6.9% was achieved over the alphabet consisting of the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A structure for adaptive order statistics filtering

    Publication Year: 1994 , Page(s): 265 - 280
    Cited by:  Papers (8)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1324 KB)  

    In applications such as smoothing and enhancement of images, adaptive filtering techniques offer the flexibility needed for good performance with non-stationary observations. Many adaptive schemes can be based on the idea of determining the local statistics of the signal through appropriate tests on the data, to aid in the selection of a filtering procedure that is suited to the data. In the paper... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Optimal space-varying regularization in iterative image restoration

    Publication Year: 1994 , Page(s): 319 - 324
    Cited by:  Papers (16)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (524 KB)  

    It has been shown that space-variant regularization in image restoration provides better results than space-invariant regularization. However, the optimal choice of the regularization parameter is usually unknown a priori. In previous work, the generalized cross-validation (GCV) criterion was shown to provide accurate estimates of the optimal regularization parameter. The author introduces a modif... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Fan filters, the 3-D Radon transform, and image sequence analysis

    Publication Year: 1994 , Page(s): 253 - 264
    Cited by:  Papers (7)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (896 KB)  

    This paper develops a theory for the application of fan filters to moving objects. In contrast to previous treatments of the subject based on the 3-D Fourier transform, simplicity and insight are achieved by using the 3-D Radon transform. With this point of view, the Radon transform decomposes the image sequence into a set of plane waves that are parameterized by a two-component slowness vector. F... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Efficient quadtree coding of images and video

    Publication Year: 1994 , Page(s): 327 - 331
    Cited by:  Papers (108)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (424 KB)  

    The quadtree data structure is commonly used in image coding to decompose an image into separate spatial regions to adaptively identify the type of quantizer used in various regions of an image. The authors describe the theory needed to construct quadtree data structures that optimally allocate rate, given a set of quantizers. A Lagrange multiplier method finds these optimal rate allocations with ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Image identification and restoration in the subband domain

    Publication Year: 1994 , Page(s): 312 - 314
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (280 KB)  

    When faced with a large support point spread function (PSF), the iterative expectation-maximization (EM) algorithm, which is often used for PSF identification, is very sensitive to the initial PSF estimate. To deal with this problem, the authors propose to do EM image identification and restoration in the subband domain. After the image is first divided into subbands, the EM algorithm is applied t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A Bayesian approach to image expansion for improved definition

    Publication Year: 1994 , Page(s): 233 - 242
    Cited by:  Papers (167)  |  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (776 KB)  

    Accurate image expansion is important in many areas of image analysis. Common methods of expansion, such as linear and spline techniques, tend to smooth the image data at edge regions. This paper introduces a method for nonlinear image expansion which preserves the discontinuities of the original image, producing an expanded image with improved definition. The maximum a posteriori (MAP) estimation... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The Khoros software development environment for image and signal processing

    Publication Year: 1994 , Page(s): 243 - 252
    Cited by:  Papers (42)  |  Patents (26)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (968 KB)  

    Data flow visual language systems allow users to graphically create a block diagram of their applications and interactively control input, output, and system variables. Khoros is an integrated software development environment for information processing and visualization. It is particularly attractive for image processing because of its rich collection of tools for image and digital signal processi... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Index assignment for progressive transmission of full-search vector quantization

    Publication Year: 1994 , Page(s): 307 - 312
    Cited by:  Papers (14)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (548 KB)  

    The authors study codeword index assignment to allow for progressive image transmission of fixed rate full-search vector quantization (VQ). They develop three new methods of assigning indices to a vector quantization codebook and formulate these assignments as labels of nodes of a full-search progressive transmission tree. The tree is used to design intermediate codewords for the decoder so that f... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Space-frequency localized image compression

    Publication Year: 1994 , Page(s): 302 - 307
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (676 KB)  

    Subband and wavelet-based image compression can be viewed as frequency oriented techniques because each subimage in the decomposition is essentially a band-pass version of the original image. The authors suggest a space-frequency partition scheme to fully exploit the excellent localization properties of wavelets in both the spatial and frequency domains. Due to the relatively large number of block... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sidelobe reduction via adaptive FIR filtering in SAR imagery

    Publication Year: 1994 , Page(s): 292 - 301
    Cited by:  Papers (34)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (880 KB)  

    The paper describes a class of adaptive weighting functions that greatly reduce sidelobes, interference, and noise in Fourier transform data. By restricting the class of adaptive weighting functions, the adaptively weighted Fourier transform data can be represented as the convolution of the unweighted Fourier transform with a data adaptive FIR filter where one selects the FIR filter coefficients t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

IEEE Transactions on Image Processing focuses on signal-processing aspects of image processing, imaging systems, and image scanning, display, and printing.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Scott Acton
University of Virginia
Charlottesville, VA, USA
E-mail: acton@virginia.edu 
Phone: +1 434-982-2003