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Showing papers on "Sketch recognition published in 1986"



Journal ArticleDOI
01 May 1986
TL;DR: This panel discussion should give many answers to this question: why has this set of techniques had so little impact on user interface design practice, despite its long history and promise?
Abstract: Recently there has been increasing attention to character recognition/graphical user interfaces under the name of “gesture input”. This technique actually has a long history: “sketch recognition” interfaces of 15 or more years ago were highly praised [Applicon 73], and user interfaces using handwriting input before the wide use of text keyboards were one of the first research goals in computer science [Bledsoe 59]. The underlying character and symbol recognition technologies have been a major research area in their own right since the early 1950s [Suen 80].The last two years have seen an upsurge in the number of developments in this area, both from commercial companies attempting to exploit new character and symbol recognition technologies, [CIC 85] [Pencept 84] [Cooper 82] and from researchers starting from fundamental questions in user interactions [Buxton 86] [Wolf 86]. However, one question still remains: “Why has this set of techniques had so little impact on user interface design practice, despite its long history and promise?” This panel discussion should give many answers to this question.Panelists include the leading commercial developers of handwriting input products, well-known researchers in the psychological aspects of graphical user interactions, and representatives of the research community for character recognition.The issue of supporting this type of interface is very timely: recent standardization efforts such as PHIGS and GKS for graphics interactions are known to have the unfortunate side effects of excluding some of the current user interface designs using this class of technology [10].

7 citations


01 Jan 1986
TL;DR: This book treats two basic components of pattern recognition from both theoretical and and practical points of view, and tries to describe structures so that readers can review them broadly.
Abstract: Feature extraction and matching are crucial to pattern recognition. However, there is no systematic presentation on these topics. The authors attempted to describe structures so that readers can review them broadly. Though, the content level is high, it is comprehensibly written, using many illustrated figures. This book treats two basic components of pattern recognition from both theoretical and and practical points of view.

6 citations


Proceedings ArticleDOI
01 Apr 1986
TL;DR: An object recognition system has been developed which incorporates topological as well as geometric information to match viewpoint dependent object descriptors and the use of theorem proving techniques to verify object identities is used.
Abstract: An object recognition system has been developed which incorporates topological as well as geometric information to match viewpoint dependent object descriptors. Theorem proving techniques are used to produce symbolic pattern matches. The recognition process uses a three phase approach. First, hypotheses are generated which correspond to model descriptors that are likely to match the data. Evidence is applied to viable hypotheses to produce a partial match. The partial match is then used to constrain the full recognition process which leads to object identification. This strategy has been found to strongly constrain the search space of possible matches and leads to large reductions in recognition times. The major contributions of the system are the representation scheme and the use of theorem proving techniques to verify object identities. This approach permits describing objects at a variety of levels and facilitates recognition despite missing information or the inclusion of artifactual data. Results of the recognition process on synthetic and actual laser range data are presented for curved and planar objects. The system is shown to operate with robustness and alacrity.

1 citations