Journal
REMOTE SENSING
Volume 13, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/rs13142782
Keywords
image segmentation; region merging; segmentation quality optimization; merging criteria
Categories
Funding
- National Key research and Development Program of China [2017YFB0504204, 2018YFB0505000]
- National Natural Science Foundation of China [41971375]
- Flexible Talent Introduction Project of Xinjiang Uygur Autonomous Region
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This paper presents a method for detecting and correcting region-merging image segmentation errors, along with the establishment of an iterative optimization model. By using a regional anchoring strategy and an equal-scale local evaluation method, segmentation accuracy has been effectively improved.
Image segmentation plays a significant role in remote sensing image processing. Among numerous segmentation algorithms, the region-merging segmentation algorithm is widely used due to its well-organized structure and outstanding results. Many merging criteria (MC) were designed to improve the accuracy of region-merging segmentation, but each MC has its own shortcomings, which can cause segmentation errors. Segmentation accuracy can be improved by referring to the segmentation results. To achieve this, an approach for detecting and correcting region-merging image segmentation errors is proposed, and then an iterative optimization model is established. The main contributions of this paper are as follows: (1) The conflict types of matching segment pairs are divided into scale-expression conflict (SEC) and region-ownership conflict (ROC), and ROC is more suitable for optimization. (2) An equal-scale local evaluation method was designed to quantify the optimization potential of ROC. (3) A regional anchoring strategy is proposed to preserve the results of the previous iteration optimization. Three QuickBird satellite images of different land-cover types were used for validating the proposed approach. Both unsupervised and supervised evaluation results prove that the proposed approach can effectively improve segmentation accuracy. All explicit and implicit optimization modes are concluded, which further illustrate the stability of the proposed approach.
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