Now showing items 1-20 of 37

    • ANALYSIS AND SIMULATION OF A COMMON BUS MULTIPROCESSOR 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1987-06-01)
      No abstract
    • AN APPROACH TO LICENSE PLATE RECOGNITION 

      Parker, J.R.; Federl, P. (University of Calgary, Computer Science, Science, 1996-10-01)
      Here we describe a project that deals with license plate location in raster images. The algorithm takes a raster image as input, and yields the position of a plate in the image. After the position is determined, the algorithm ...
    • AN APPROACH TO STELLAR PHOTOMETRY USING SIMULATED ANNEALING 

      Parker, J.R.; Groisman, G. (University of Calgary, Computer Science, Science, 1995-04-01)
      Simulated annealing can be quite effectively used to fit functions of many parameters to a set of data. This paper discusses the application of simulated annealing to the fitting of Moffat functions to crowded field star ...
    • CHARACTER THINNING USING A DIFFERENCE OPERATOR 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1985-06-01)
      A character thinning method is presented that makes use of edge directions as determined by a difference operator. A preprocessing stage, also using a difference, minimizes the production of tails and the necking effect.
    • COMPUTER ASSISTED PHOTOMETRY USING SIMULATED ANNEALING 

      Parker, J.R.; Groisman, G. (University of Calgary, Computer Science, Science, 1993-02-01)
      The computationaltechnique known as simulated annealing, which originally was used to solve problems in combinatiorial optimization, can be quite effectively used to fit functions of many parameters to a set of data. ...
    • DATA MODELING IN SCIENTIFIC IMAGES USING SIMULATED ANNEALING 

      Parker, J.R.; Groisman, G. (University of Calgary, Computer Science, Science, 1993-02-01)
      One way to measure objects in some classes of scientific image is to model the objects by functions and then make the measurements on the functions. This works especially well for images that contain information in the ...
    • DESIGN AND ANALYSIS OF A MULTIPROCESSOR FOR IMAGE PROCESSING 

      Parker, J.R.; Ingoldsby, T.R. (University of Calgary, Computer Science, Science, 1990-08-01)
      No Abstract
    • DISTRIBUTED FORCE-BASED THINNING AND A GENERAL DISTRIBUTION METHOD 

      Molaro, D.; Parker, J.R.; Jennings, C. (University of Calgary, Computer Science, Science, 1993-02-01)
      A recently developed thinning algorithm, based on computing repulsive `forces' acting on each object pixel, produces nice skeletons, but involves some very intensive computations. As a result, the method takes a long ...
    • EXTRACTING VECTORS FROM RASTER IMAGES 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1987-02-01)
      It is often true that a user of computer images is interested in only a few kinds of features. In particular, in a class of pictures called line images, the major feature is a line or vector. Raster representations of line ...
    • FAST DIGITAL EROSION/DILATION OF MICROPORE IMAGES 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1987-06-01)
      No abstract
    • FORCE-BASED THINNING STRATEGY WITH SUB-PIXEL PRECISION 

      Molaro, D.; Parker, J.R.; Jennings, C. (University of Calgary, Computer Science, Science, 1993-02-01)
      Most vision researchers would agree that the medial axis transform does not yield an ideal, or in some cases even acceptable, skeleton. For example, single pixel irregularities can produce gross changes in an otherwise ...
    • A GENERAL CHARACTER TO INTEGER CONVERSION METHOD 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1982-04-01)
      Most programs which involve character to integer conversion fail to detect integer overflow correctly. This paper describes some of the pitfalls of not recognizing overflow, and presents a correct method for doing so in ...
    • A GENETIC ALGORITHM FOR STELLAR PHOTOMETRY 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1995-04-01)
      A class of scientific images, which we will call blot images, contains information in the form of relationships between grey level pixels. One way to extract this information is to fit model functions to the objects in the ...
    • GENETIC OPERATORS ON FLOATING POINT PARAMETERS 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1995-04-01)
      The single bit mutation and one point crossover operations are most commonly implemented on a chromosome that is encoded as a bit string. If the actual arguments are real numbers this implies a fixed point encoding and ...
    • GREY LEVEL THRESHOLDING IN BADLY ILLUMINATED IMAGES 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1990-06-01)
      Most grey level thresholding methods produce very good results in situations where the illumination gradient in the original raster image is regular and not too large. In other cases, such as a large linear change in ...
    • HANDPRINTED DIGIT RECOGNITION BY STROKE TRACING 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1995-04-01)
      A structural method of recognizing handprinted digits is described, in which the strokes comprising the digits are decomposed into line segments. The lines are matched against stroke templates, beginning at a `pen down' ...
    • HIDDEN OBJECT RECONSTRUCTION FROM ACOUSTIC SLICES 

      Parker, J.R.; Attia, E.N. (University of Calgary, Computer Science, Science, 1996-10-01)
      A method for reconstructing 3D models from cross-sectional seismic signals, which could be used in visualizing underground objects, is presented. The new algorithm starts with preprocessing the sonar images by thresholding, ...
    • A HIGH-LEVEL PROGRAMMING LANGUAGE FOR DIGITAL MORPHOLOGY 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1998-03-01)
      A system for digital morphology is presented in which morphological operators are implemented as basic operation in a programming language, and where basic data types include pixels and images. The resulting language can ...
    • A MICROPROGRAMMING SIMULATOR FOR INSTRUCTIONAL USE 

      Parker, J.R.; Becker, Katrin (University of Calgary, Computer Science, Science, 1983-10-01)
      No Abstract
    • MULTIPLE SENSORS, VOTING METHODS AND TARGET VALUE ANALYSIS 

      Parker, J.R. (University of Calgary, Computer Science, Science, 1998-02-01)
      Voting techniques for high level sensor/data fusion are explored here, with examples from character recognition and target value analysis. High degrees of reliability can be achieved, and the method can be applied to ...