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An Improved Seeded Region Growing-Based Seamline Network Generation Method

1
The State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan 430079, China
2
Collaborative Innovation Center for Geospatial Technology, Wuhan 430079, China
3
Satellite Surveying and Mapping Application Center, NASG National Administration of Surveying, Mapping and Geoinformation, Beijing 101300, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2018, 10(7), 1065; https://doi.org/10.3390/rs10071065
Received: 21 May 2018 / Revised: 21 June 2018 / Accepted: 3 July 2018 / Published: 5 July 2018
(This article belongs to the Section Remote Sensing Image Processing)
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Abstract

To generate an orthoimage product, mosaicking is a necessary process, and seam-based mosaicking of orthoimages is popular. However, many of these methods only focus on the generation of seamlines between two adjacent orthoimages, so the final generated mosaicking image depends on the order of compositing. To address this shortcoming, this paper presents an initial seamline network generation method based on improved seeded region growing. The basis of this method is the use of raster data rather than vector calculation, which is used with the area Voronoi diagrams with overlap (AVDO)-based method. First, the effective area of each image and overlap regions between adjacent images are determined. Then, the improved seeded region growing algorithm obtains the seamlines of each overlap region. The main improvement is that the boundary lines of overlap regions, rather than individual points, are chosen as seeds of the seeded region growing algorithm. These seeds grow simultaneously until growing regions overlap. The generated separatrix of growing regions is regarded as the seamline in the overlap region. At the same time, the cut result of the image’s effective area is obtained. After that, these generated cut images are intersected to generate the effective mosaic polygon (EMP) of the image. Finally, all generated EMPs are vectorized to form the initial seamline network. In this way, the proposed method can process any kind of overlap region, and the final generated seamline network has no relation to the order of the image compositing. The experimental results demonstrate that the presented method is feasible and can achieve higher accuracy than the previous AVDO-based method. View Full-Text
Keywords: orthoimage; mosaic; raster; Voronoi; seamline network; effective mosaic polygon; improved seeded region growing orthoimage; mosaic; raster; Voronoi; seamline network; effective mosaic polygon; improved seeded region growing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Pan, J.; Fang, Z.; Chen, S.; Ge, H.; Hu, F.; Wang, M. An Improved Seeded Region Growing-Based Seamline Network Generation Method. Remote Sens. 2018, 10, 1065.

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