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Parametric pattern-making technology has based on procedural process for past decades in the field of GCAD. This paper presents a new method of parametric pattern-making technology. This method firstly finds out the constraint relations among geometric entities by analyzing the rules and sequences of geometric entities in pattern-making operation and(More)
Variant programming is regarded as a parametric design in literal and fundamental sense. Some parametric pattern models based on constraints are constructed by a sequence of operation and dimensional formula, not geometric constraints. In our previous work, parametric pattern-making model is created by geometric constraint graph. After surveying dimensional(More)
This paper presents an improved embedded zerotree wavelet (EZW) coding algorithm. According to the characteristic of coefficients and human visual system (HVS), an attempt is made to improve Shapiro's EZW algorithm. The improved algorithm pays more attention to the edge of one image because human visual system is sensitive to the distortion of image edge(More)
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