Elliptic arc vectorization for 3d pie chart recognition

In this paper, we present a novel approach to vectorize elliptic arcs for 3D pie chart recognition and data extraction. As a preprocessing step, a set of straight line segments are obtained first. By estimating the parameters based on the line segments, we are able to generate elliptic arc candidates. Curve fitting is then performed to reject false positives and further refine the parameters of each elliptic arc. The vectorized elliptic arcs are the key components in the 3D pie charts that allow us to determine the chart type and to extract data values embedded. Experiments using a group of testing images show that the proposed method works well and is computationally efficient.

• Type: Conference
• Year: 2004
• Where: ICIP
• Authors: Weihua Huang, Chew Lim Tan, Wee Kheng Leow
• Keywords: Elliptic Arc Candidates, ICIP 2004, Image Processing, Pie Chart Recognition, Pie Charts, Straight Line Segments, Vectorized Elliptic Arcs