These figures of speech mainly included comparison for the sameness,allusions for the differences,antithetical couplets within one sen-tence,transposed figurativeness,and intra-sentential head and tail joining,etc.

Based on the famous phenomenon of simultaneous contrast in biological vision,a new model of anisotropic receptive field used in edges detection is proposed.

Based on the comparison between the mechanism of the simultaneous contrast in biological vision and the anisotropic high-pass filtering and the analysis of the relation between the filtering performance and the angle of the edges and the orientation of the filter s long axes,an anisotropic high-pass filtering scheme on the basis of angle searching is proposed in this paper.