Showing papers by "Ching Y. Suen published in 1989"

Computer recognition and human production of handwriting

Abstract: This book contains a representative cross section of critically reviewed papers from the Third International Symposium on Handwriting and Computer Applications (Montreal, 1987). The first section focuses on different aspects of computer recognition of handwriting such as signature analysis and verification, and on-line and off-line recognition of handwritten characters and cursive script. In sections two and three handwriting is examined from a number of perspectives including basic modelling, the neural and motor aspects of handwriting, as well as the educational implications of handwriting research. This volume hopes to help researchers involved in handwriting research achieve better understanding of the handwriting process, shed new light on motor control and learning, and solve recognition problems.

Reconstruction of two-dimensional patterns from Fourier descriptors

Abstract: Two kinds of Fourier shape descriptors (FDs) are considered in this article: ZR (defined by Zahn and Roskies) and G (defined by Granlund). The first section of this article studies ZR descriptors. Four modifications of ZR descriptors are proposed. These new descriptors are based on the step signature, smoothed signature, linearized smoothed signature, and the curvature function, respectively. The amplitudes of FDs are shown to be invariant under rotations, translations, changes in size, mirror reflections, and shifts in the starting point. In all cases the reconstruction accuracy in terms of the number of FDs is studied, resulting in approximation error bounds. An efficient reconstruction formula based on the composite rectangle integration method is proposed. This method also provides polygonal approximation for arbitrary contours. In the second section of this article, the theoretical results are illustrated with examples and verified in numerical experiments involving digitized patterns. In the same experiments the performances of ZR and G descriptors are compared.

Computer vision and shape recognition

Abstract: This is an up-to-date volume of selected and expanded papers originating from Vision Interface 88, a conference held in Edmonton, Canada. A broad range of topics are covered-from image processing to hardware design. They include robot vision, biomedical imaging, remote sensing and parallel processing, shape recognition and features, computational methods in vision, and three dimensional vision and application.