吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (3): 953-960.doi: 10.13229/j.cnki.jdxbgxb201503039

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Influence of tilting angle on tilting sampling aliasing and relationship between aliasing and resolution

WANG Jing-meng1, 2, 3, 4, ZHANG Ai-wu1, 2, 3, 4, ZHAO Ning-ning1, 2, 3, 4, MENG Xian-gang1, 2, 3, 4   

  1. 1.College of Resources Environment and Tourism,Capital Normal University,Beijing 100048,China;
    2.Laboratory of 3D Information Acquisition and Application,MOST,Beijing 100048,China;
    3.Beijing Municipal Key Laboratory of Resources Environment and GIS, Beijing 100048,China;
    4.State Key Laboratory Incubation Base of Urban Environmental Processes and Digital Simulation, Beijing 100048,China
  • Received:2013-09-23 Online:2015-05-01 Published:2015-05-01

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Abstract: In tilting sampling the relationships between the selection of tilting angle and the spectral aliasing as well as the resolution are ambiguous. To overcome this problem, the source of the spatial aliasing is analyzed based on sampling theory, and an Aliasing Index (AI) is designed, which measures the extent of aliasing. In addition, the effective spatial resolution is introduced to analyze the relationships among the titling angle, spectral aliasing and effective resolution. Results show that, under the same condition, within the tilting angle range from 57° to 89°, the aliasing and spatial effective resolution in tilting sampling are higher than that in normal sampling; the tilting angle corresponding to the minimum aliasing is 78°, and that corresponding to the maximum spatial effective resolution is 75°. Curve fitting shows that the spectral aliasing and the effective spatial resolution are power-law correlated. It is helpful to understand the relationship between aliasing and resolution with various titling angles for practical application to meet specific need.

Key words: photogrammetry and remote sensing, aliasing index, optimal reciprocal cell, tilting sampling, spatial effective resolution

CLC Number: 

  • TP751.1
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