Научная визуализация, 2024, том 16, номер 2, страницы 1 - 10, DOI: 10.26583/sv.16.2.01

Multiscale Analysis of High Resolution Digital Elevation Models Using the Wavelet Transform

Автор: A.N. Zemtsov¹

Federal State Budgetary Educational Institution of Higher Education "Volgograd State Technical University"

¹ ORCID: 0000-0001-6430-3615, azemtsow@mail.ru

 

Аннотация

A technique is proposed for choosing the optimal wavelet basis in terms of decorrelation of the spectral coefficients of the wavelet basis when solving the problem of representation of digital elevation models. In the course of the work, it was revealed that the selection of the spectral transform basis significantly affects the accuracy of the representation of the original model. The proposed method to the decomposition of digital elevation models based on the discrete wavelet transform does not require large computational costs. A technique is proposed for selection the optimal wavelet basis from the position of the minimum mean square error of the reconstructed signal, when quantizing the high-frequency expansion coefficients. Expressions are obtained for generating scaling and wavelet functions in space. The method developed to represent digital elevation models has good properties, which allows to significantly increase the resolution of digital elevation models in the implemented regional geoinformation system.

 

Ключевые слова: digital elevation models, data visualization, wavelets, multiresolution, dis-crete wavelet transform, digital twins, terrain model.