Ms. Shuna Feng Profile

Shuna Feng

at China Univ of Mining and Technology

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Proceedings Article | 18 November 2014 Paper

Validation of the morphological compositing method for ZY-3 satellite imagery

Shuna Feng, Yindi Zhao

Proceedings Volume 9263, 926322 (2014) https://doi.org/10.1117/12.2068895

KEYWORDS: Image segmentation, Image filtering, Earth observing sensors, Image quality, Image processing algorithms and systems, Satellite imaging, Satellites, Visualization, Radiometry, Landsat

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Each scene of image generated from earth observation satellites can only cover a certain area. When one scene cannot cover a user’s area of interest, two or more scenes are needed to be registered and combined into a single image, and this composition process is referred to as image mosaicking. The key issue in image composition is to decide where to place the seam line in overlapping region. The optimal seam line which joins several scenes of images covered the entire study area, is usually determined by texture and other characteristics of the overlap region for seamless quality. Recently, a morphological image compositing algorithm was proposed which is able to automatically delineate seam lines along salient image structures. And this algorithm uses the ideas of marker-controlled segmentation for image mosaicking and divides the overlap region into a determined number of areas. The resulting seam lines of the morphological image compositing algorithm cut along high gradient regions which are object edges in initial images. However, the morphological compositing method only applied to delineate the invisible seam line to the human eyes based on Landsat ETM+ data which is the representation of medium resolution data. In this paper, we test the validation of the morphological compositing method to generate visually pleasing seam line for image mosaic without changing the image radiometry and feasibility to handle two adjacent scenes simultaneously on high spatial resolution imagery by using ZY-3 multispectral image data. The focus of this paper is developing a quantitative evaluation measure which is usually formulated as the sum of morphological gradient of the image mosaic along the seam line divided by the length of the seam to quantitatively estimate the ‘quality’ of the automatically delineate seam line.

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