Image-based artefact research for Beijing-1 Small Satellite.

Abstract: Compared to big satellites, small satellites are more sensitive to disturbances and likely to have more jitter due to their instability. In some of the acquired Beijing-1 small satellite panchromatic images, the artefact caused by jitter greatly reduces image qualities by bringing jagging to edges of the observed objects. In this paper, researches of the artefact are conducted with the jagged images. First, on theoretic bases and with image verification, properties of the Beijing-1 small satellite artefact are analyzed and a model is set up, then, accordingly artefact removal methods are brought up from similarity analysis of the image lines. Thorough discussions for usability of the methods are done and resulting in a conclusive strategy. Tests of the strategy with real and simulated artefactual images gain favorable results. Researches in this paper provide practical ground image processing solutions for settling of the artefact problem. Analyses of artefact properties can also provide assistance to searching for incentives of the artefact. [Copyright &y& Elsevier]