公开(公告)号：US10580150B2

公开(公告)日：2020-03-03

申请号：US15894956

申请日：2018-02-13

Applicant: Macau University of Science and Technology

Inventor： Zhanchuan Cai ,  Wei Cao

IPC: G06T7/44 ,  G06T17/05 ,  G06F17/16 ,  G06F17/11

Abstract: Example embodiments include a method that improves calculations of surface roughness that map a planetary surface. The method includes calculating a V-system matrix with a size of α×α in an interval [0,1]; transforming the V-system matrix into an orthogonal matrix; improving calculations of the surface roughness of the planetary surface by calculating the surface roughness of a digital elevation model generated from data captured from the planetary surface; and generating a map of the planetary surface based on the surface roughness.

公开(公告)号：US10354398B2

公开(公告)日：2019-07-16

申请号：US15367158

申请日：2016-12-01

Applicant: Macau University of Science and Technology

Inventor： Zhanchuan Cai ,  Wei Cao

IPC: G06K9/00 ,  G06T7/40 ,  G06K9/46

Abstract: A method executed by a computer system to construct an omnidirectional roughness (OR) map of a lunar crater based on a data set of a digital elevation model (DEM) of surface textures of the lunar crater is provided. The method includes setting a center and a first point of the data set, selecting a moving window, utilizing a one point-to-point step when the moving window slides over the DEM, calculating a morphological surface roughness (MSR) that detects a vertical roughness of the lunar crater, calculating a topographic frequency coefficient (TFC) that detects a horizontal roughness of the lunar crater, constructing the OR map, and displaying the OR map to show a surface roughness of the lunar crater.