Abstract: Currently, the assessment of the three-dimensional visual effects is concentrated on the assessment methods, while ignoring the role of the index system. Therefore, an index system about fidelity evaluation of the visual simulation was proposed, including the various steps of the construction of the entire visual simulation system. The steps are from three-dimensional modeling to the output of simulation screen. On this basis, the evaluation method of dimensional visual effects was proposed based on improved grey clustering, and it is the combination of subjective and objective. The fuzzy evaluation was used to improve the method of determining the weights, and the integrated clustering coefficient could be obtained by weighting of the underlying index. So that different picture could be compared and analyzed, regarding a virtual waves environment as an assess example. The simulation results show that the method can reasonably solve the problem of the three-dimensional visual effects assessment.

Key words: grey clustering, dimensional visual effects, evaluation method, fuzzy evaluation, index system