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IEEE Transactions on Computers

Issue 7 • Date July 1972

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Displaying Results 1 - 25 of 26
  • IEEE Transactions on Computers - Table of contents

    Publication Year: 1972, Page(s):c1 - 836
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  • IEEE Computer Society

    Publication Year: 1972, Page(s): c2
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  • Preface

    Publication Year: 1972, Page(s):633 - 635
    Cited by:  Papers (1)
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  • Generalized Wiener Filtering Computation Techniques

    Publication Year: 1972, Page(s):636 - 641
    Cited by:  Papers (63)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3304 KB)

    The classical signal processing technique known as Wiener filtering has been extended to the processing of one-and two-dimensional discrete data by digital operations with emphasis on reduction of the computational requirements. In the generalized Wiener filtering process a unitary transformation, such as the discrete Fourier, Hadamard, or Karhunen-Loéve transform is performed on the data tha... View full abstract»

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  • Encoding and Decoding of Color Information Using Two-Dimensional Spatial Filtering

    Publication Year: 1972, Page(s):642 - 647
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2552 KB)

    Spatial frequency encoding is described as it applies to both photographic and television systems. In each case, color separations amplitude modulate spatial frequency carriers. The photographic system separates the carriers in the two-dimensional Fourier transform plane using coherent optics; the television system employs a two-dimensional electrical filter to perform the same separation. These f... View full abstract»

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  • Design and Application of Optimal Velocity Filters in Seismic Exploration

    Publication Year: 1972, Page(s):648 - 654
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1568 KB)

    Many seismic experiments result in multiple time series which can be decomposed into signal and additive noise, where the noise has both a coherent and an incoherent component. The signal and the two noise components are stationary second-order random functions. The time shifts, called moveouts, of the signal and coherent noise are random variables with known distributions. Wiener filter theory is... View full abstract»

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  • Techniques ror Change Detection

    Publication Year: 1972, Page(s):654 - 659
    Cited by:  Papers (54)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3600 KB)

    The problem of change detection presents itself for imaging systems that view the same scene repeatedly. Current research programs based on the processing of side-looking radar imagery show that spatial alignment of the various parts of the image must be highly accurate if noise in the difference picture is to be reduced to acceptably low levels. Typically, the spatial alignment accuracy must be b... View full abstract»

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  • A Stochastic Syntax Analysis Procedure and Its Application to Pattern Classification

    Publication Year: 1972, Page(s):660 - 666
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    A procedure is described for stochastic syntax analysis of context-free languages. The parsing algorithm utilizes a bottom-up technique used in precedence languages. All decisions encountered in the algorithm ate determined statistically. The stochastic choice is computed from the a priori probability distribution of the language. Also developed is a stochastic context-free language for use in pat... View full abstract»

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  • Texture Measures for Automatic Classification of Pulmonary Disease

    Publication Year: 1972, Page(s):667 - 676
    Cited by:  Papers (94)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5488 KB)

    The complete pattern recognition problem is considered for the practical solution to a current significant medical question. Automated screening of chest radiographs for the detection of textural type abnormalities is approached from the view of: 1) preprocessing for standardization and data reduction; 2) feature extraction of characteristic measures (feature selection by optimization of classific... View full abstract»

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  • Edge and Curve Detection: Further Experiments

    Publication Year: 1972, Page(s):677 - 715
    Cited by:  Papers (71)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3896 KB)

    Further work is described on simple sets of parallel operations that detect "texture edges" (abrupt discontinuities in the average values of local picture properties), as well as spots or streaks that are texturally different from their surrounds. View full abstract»

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  • Automated Cloud Tracking Using Precisely Aligned Digital ATS Pictures

    Publication Year: 1972, Page(s):715 - 729
    Cited by:  Papers (29)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4608 KB)

    The measurement of winds to an accuracy of at least 2 knots (1 m/s) is a major requirement of the global atmospheric research program (GARP) [1]. Such accurate wind measurements will be needed over large regions presently lacking ground or rawinsonde observations. A man-computer system called WINDCO has been developed to measure cloud motion from ATS pictures. This system is capable of providing c... View full abstract»

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  • Velocity Analysis: An Application of Deterministic Estimation to Reflection Seismology

    Publication Year: 1972, Page(s):730 - 738
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3136 KB)

    A problem that is common to all phases of seismic data processing is the lack of knowledge concerning the input or seismic source signal axnd the noise characteristics of the recorded waveforms from the seismic sensors. View full abstract»

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  • A Video Simulation Facility

    Publication Year: 1972, Page(s):738 - 740
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    A system for simulating video bandwidth compression techniques is described. The simulation facility accepts up to 10 s of real-time video and slows the scan rate so that this information can be converted for storage and processing on a digital computer. The processed information is then converted back to real-time video for visual evaluation. View full abstract»

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  • Analysis of Cells

    Publication Year: 1972, Page(s):740 - 753
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3536 KB)

    Three methods approaching the analysis of cells are described, with applications. The methods presuppose that the picture of the cells has already been digitized and resides in the memory of a computer. The first method is an ad hoc approach in which intercommunicating programmable cursors are utilized for the detection of boundary and area features. The second method is concerned with an evaluati... View full abstract»

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  • Extraction of Connected Edges from Knee Radiographs

    Publication Year: 1972, Page(s):753 - 758
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5352 KB)

    A computer algorithm is described that extracts the edge information from a digital image of an AP radiograph of the knee. Automated image field partitioning is used as a simplifying first step in the process. Methods that employ a priori knowledge are used to insure simple connected edges. View full abstract»

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  • Layered "Recognition Cone" Networks That Preprocess, Classify, and Describe

    Publication Year: 1972, Page(s):758 - 768
    Cited by:  Papers (80)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3872 KB)

    This note gives a brief overview of six types of pattern recognition programs that: 1) preprocess, then characterize; 2) preprocess and characterize together; 3) preprocess and characterize into a "recognition cone;" 4) describe as well as name; 5) compose interrelated descriptions; and 6) converse. View full abstract»

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  • Objective Methods for Registering Landmarks and Determining Cloud Motions from Satellite Data

    Publication Year: 1972, Page(s):768 - 776
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3520 KB)

    Cloud photographs are available from geosynchronous weather satellites at intervals of approximately 20 min. Sequences of such photographs show cloud motions over vast regions of the planet, providing a potential source of useful weather data, particularly over the oceans, since there are few weather-monitoring stations at sea. Our computer programs represent objective methods that require a minim... View full abstract»

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  • Recognition of Handwritten Characters by Topological Feature Extraction and Multilevel Categorization

    Publication Year: 1972, Page(s):776 - 785
    Cited by:  Papers (6)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2880 KB)

    A handwritten character recognition system has been designed by making use of topological feature extraction and multilevel decision making. By properly specifying a set of easily detectable topological features, it is possible to convert automatically the handwritten characters into stylized forms and to classify them into primary classes with similar topological configurations. Final recognition... View full abstract»

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  • The Application of Filtered Transforms to the General Classification Problem

    Publication Year: 1972, Page(s):785 - 790
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1680 KB)

    An image classification model based on nearest prototypes in filtered Fourier and Walsh transform domains is presented. A computer simulation of the model applied to handwritten English letters, Russian letters, numerals, and electromagnetic signals is also presented. Experiments to date fail to refute the working hypothesis that generalized harmonic analysis can be used to reliably classify alpha... View full abstract»

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  • A New Data Base for Syntax-Directed Pattern Analysis and Recognition

    Publication Year: 1972, Page(s):790 - 801
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3208 KB)

    The problem of developing an appropriate data base for syntax-directed pattern analysis and recognition is considered. A new data base is introduced by generalizing the notion of concatenation in representing patterns with a relationship matrix. The characteristics of relationship matrix are demonstrated in teh context of formal language theory. It is shown that this data base will allow us to rem... View full abstract»

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  • A Fast Computer Method for Matrix Transposing

    Publication Year: 1972, Page(s):801 - 803
    Cited by:  Papers (47)  |  Patents (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    A method is given for transposition of 2n×2n data matrices, larger than available high-speed storage. The data should be stored on an external storage device, allowing direct access. The performance of the algorithm depends on the size of the main storage, which at least should hold 2n+1 points. In that case the matrix has to be read in and written out n times. View full abstract»

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  • Automatic Generation of Texture Feature Detectors

    Publication Year: 1972, Page(s):803 - 812
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (7912 KB)

    This correspondence is an informal exposition on a method of pattern recognition recently introduced by McCormick and Michalski. The method, described here by means of a simple example and a biological application, provides mechanized generation of an optimum set of "intervals" which can be interpreted as local position-invariant digital operations for use in picture filtering with a parallel arra... View full abstract»

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  • Transfer Function Compensation of Sampled Imagery

    Publication Year: 1972, Page(s):812 - 818
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (4976 KB)

    With the availability of the computer for two-dimensional picture processing, digital restoration of deterministically degraded sampled images is a practical reality. This correspondence presents a mathematical formulation of discrete modulation transfer compensation of sampled imagery. The analysis makes no assumption regarding the band limitedness of the imaging system and accounts explicitly fo... View full abstract»

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  • Contributors

    Publication Year: 1972, Page(s):819 - 820
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  • Abstracts of Current Computer Literature

    Publication Year: 1972, Page(s):821 - 836
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Aims & Scope

The IEEE Transactions on Computers is a monthly publication with a wide distribution to researchers, developers, technical managers, and educators in the computer field.

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Meet Our Editors

Editor-in-Chief
Paolo Montuschi
Politecnico di Torino
Dipartimento di Automatica e Informatica
Corso Duca degli Abruzzi 24 
10129 Torino - Italy
e-mail: pmo@computer.org