Abstract: Abstract: Centering on the key algorithms and techniques for identifying the contour lines of bronze ornamental features, analyses were made on the present situation of the digital design of current decorations. Based on the computer-aided technology and triangular grid basic theory, using the image clustering and threshold method, it was proposed that the key technology of characteristic contour recognition comprised contour corner point, characteristic curve segment, segmented contour matching, and spatial curve matching. The recognition algorithm and process for the target feature of the decoration were constructed, and the maximum curvature was employed to identify contour corners. In addition, the characteristic curve segment was utilized to express and project the contour curve, and the curve chord length method was adopted to match and splice the characteristic curve. A method was established for identifying bronze decorative patterns, and based on computer-aided technology, the complete process was realized from pattern recognition to spatial curve matching and splicing. The bronze feature recognition method based on the computer-aided design technology possessed the characteristics of digitization, high-level intelligence and efficiency. The experimental results indicate that there is a promising prospect for the application of this method in target object pattern recognition and extraction.

Key words: Keywords: bronze, decoration feature, contour line, computer aided design, digital design