This paper addresses the estimation of adjacency effect of CBERS-2 image. The adjacency effect influences the digital number (DN) value of a pixel by adding surrounding scattering signals and path scattering signals. Based on the theory of radiation transfer model, a procedure is designed to measure the reflectance from the surface target materials and the materials in a box, which is 1.5 m above the surface to avoid upwelling reflectance. The results show that the adjacency effect varies from visible, near infrared and becomes steady within short infrared wavelength region; the adjacency effect weakens with the increase of distance between testing sites. The adjacency effect of CBERS-2 image is corrected and the quality of the resulting image is improved.
© 2006 Chinese Optics Letters
(110.2990) Imaging systems : Image formation theory
(110.4850) Imaging systems : Optical transfer functions
(120.4820) Instrumentation, measurement, and metrology : Optical systems
(290.4210) Scattering : Multiple scattering
Jianwen Ma and Xue Chen, "Adjacency effect estimation by ground spectra measurement and satellite optical sensor synchronous observation data," Chin. Opt. Lett. 4, 546-549 (2006)