Real 2D presentation of spatial solids and real presentation rate with fuzzy pattern recognition I—concept and principles

It is an inevitable trend for the realistic visualization to be accomplished for spatial solids with two-dimensional presentation. In the parallel projection system in which the viewing angle and the presenting angle are consistent, the concepts and evaluation indexes are put forward. Based on the comparison among the five methods, statistic pattern recognition, syntax pattern recognition, fuzzy pattern recognition, nerve-net method, and reasoning method, for determination of the design of 2D presentation, studies in detail the principles of fuzzy pattern recognition and considerations, indicating clearly the laws of subjection, threshold, closeness and nearness-selection. With fuzzy pattern recognition it is quick and convenient to obtain the location and the real presentation rate of 2D presentation for the spatial objects.