Abstract:

As for the enhancement of linear Trends, the TRUST method proposed by Smith and O’Connell does not consider the distinctions between the smooth area and other image features. The diffusion is carried on in smooth area and thus inevitably produces artifacts. An improved TRUST method was proposed. The eigenvalues of the structure matrix are reconstructed，so that the method only diffuses the image in specific areas where strong anisotropy is detected. This method is tested on both synthetic and field data sets. The results indicate that the method can be used efficiently to enhance linear structure locally in multiple directions. We have also compared the proposed method with the TRUST method by applying them to the synthetic data set. The results demonstrate that the proposed method can produce better effect with fewer artifacts.

Key words: aeromagnetic data, boudinage, enhancement of trends, TRUST method