| 摘要 |
PURPOSE:To execute the pattern recognition of a two-dimensional (2-D) picture as a three-dimensional (3-D) picture. CONSTITUTION:This pattern recognition device is provided with an edge detecting part 4 for detecting the edges of a 2-D piciture, a segment separating part 5 for decomposing the 2-D picture to plural segments, an ellipse/straight line detecting part 6 for detecting an ellipse or a straight line from the decomposed 2-D segments, a 3-D vectorizing part 7 for transforming the 2-D picture into a 3-D vector, a vectorizing dictionary part 10 storing known pictures as 3-D vectors, a coordinate transforming part 8 for collating a vector in the dictionary part 10 with the vector of an input picture, and a judging part 11 for judging the collated result. A segment in an ellipse or a stright line can be described as a segment on a circumference passing the center of a sphere only by one 3-D vector based upon spherical geometory, a curved part of the 2-D picture can be described as a segment of the 3-D vectorized ellipse and a linear part of the picture can be desribed by a segment of the 3-D vectorized striaght line. |
