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Point-to-Polygon transformation to enhance legacy data

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Leveraging legacy data is crucial for advancing Computer Vision applications in marine science, but point annotations often lack the precision needed for modern algorithms. This work introduces a novel Point-to-Polygon transformation method, repurposing the Segment Anything Model (SAM) to automatically generate machine-predicted polygons from sparse point data. Demonstrating significant improvements across three datasets—including marine infrastructure and biology—our approach accelerates dataset modernization and reduces manual annotation time, potentially saving thousands of hours.
Point-to-Polygon transformation to enhance legacy data

The escalating demand for robust datasets in Computer Vision, particularly within marine science, presents a significant bottleneck. Traditionally, creating these datasets involves either painstakingly collecting new imagery and manually annotating it, or leveraging existing “legacy” data. The latter approach, while seemingly efficient, often encounters challenges as legacy datasets frequently lack the precise polygon annotations critical for advanced AI model training. As we’ve recently seen with the deployment of robotic welding systems in China China Deploys First Indigenously Built Robotic System To Handle Welding At Offshore Oil & Gas Rigs, automation is increasingly vital to accelerate progress in the maritime sector, and this requires high-quality training data. The complexities of navigating international waters and maritime trade routes, illustrated by recent incidents involving tankers and heightened tensions US Says Tanker Ignored 60 Warnings, Crew Given 15 Minutes To Evacuate Before Strike Killed 3 Indian Sailors, further underscore the need for sophisticated maritime monitoring and analysis systems, ultimately reliant on well-annotated datasets. The recent transit of an Indian LNG carrier through the Strait of Hormuz Indian LNG Carrier Disha Becomes First Vessel To Cross Strait Of Hormuz Following US-Iran Agreement highlights the dynamic nature of maritime operations and the need for adaptable and rapidly updated datasets.

This new research offers a compelling solution to this challenge. The Point-to-Polygon conversion method, utilizing repurposed Segment Anything Models (SAM), demonstrates a significant advancement in streamlining the modernization of legacy datasets. By transforming basic point annotations into machine-predicted polygons, the method dramatically reduces the manual effort required, potentially saving an estimated 14,000 hours in a single project like BIIGLE. The reported IoU (Intersection over Union) scores, particularly the 87.2% achieved on the first dataset, are demonstrably improved over baseline SAM performance. This represents a considerable step forward, moving beyond merely identifying the presence of an object to accurately defining its shape and extent – a crucial distinction for tasks like automated species identification, infrastructure monitoring, or even the analysis of marine debris distribution. The innovative application of SAM, repurposing it from an interactive tool to an automated conversion system, showcases the power of leveraging existing, validated AI models to address specific data challenges.

The implications of this research extend beyond mere efficiency gains. Accurate polygon annotations are foundational for developing robust and reliable computer vision models across a range of marine science applications. Improved object delineation translates to more precise measurements, more accurate classifications, and ultimately, more informed decision-making. This methodology provides a pathway to unlock the value of previously underutilized legacy data, accelerating the development of new algorithms and models for ocean monitoring, resource management, and environmental protection. Furthermore, the demonstrated applicability across three diverse datasets – marine infrastructure, marine biology, and potential applications for BIIGLE – suggests a broader utility and adaptability for various scientific domains. The empirical validation through measurable IoU scores reinforces the credibility of this approach and provides a solid foundation for future development and refinement.

Looking ahead, the successful integration of this Point-to-Polygon conversion technique into broader ocean data workflows represents a key opportunity. Further research focused on refining the heuristics used in the conversion process, particularly for datasets with more complex or ambiguous point annotations, could further enhance accuracy. Investigating the potential for incorporating contextual information, such as depth or water clarity, to improve polygon prediction is another promising avenue. Ultimately, the question remains: how can we best leverage this and similar innovations to create a truly integrated data ecosystem, enabling real-time ocean intelligence and accelerating our collective understanding of the world’s oceans?

IntroductionIn the data-intensive field of Computer Vision, especially applied to marine science, we have two options for collecting image data to train our models. We can either gather new data and annotate it from scratch or use annotation data from repositories, i.e. legacy data. The former option requires a lot of extra time and effort from experts, especially if they need to draw precise polygons around the object of interest. The latter depends on the quality of the existing annotation data, which may not have been created with Computer Vision in mind. This data, often consisting of basic point annotations, could potentially be useful for AI tasks, but it must be transformed to at least a polygon or a bounding box outlining the object. The availability of training images with valid annotations describing the extension of the shape of an object is crucial for developing advanced algorithms and models. This work introduces a new method of enhancing low-level annotation data, in particular point annotations, to make it usable for state-of-the-art Computer Vision tasks.MethodsBy repurposing the Segment Anything Model (SAM) from an interactive tool to an automatic conversion-based approach, we developed a method that transforms point annotations into machine-predicted polygons. We demonstrate its effectiveness by applying it to three different datasets, one for marine infrastructure and two for marine biology. The first consists of 384 point annotations, the second of 523, the third of 117.ResultsUsing the heuristics proposed in this paper on the first dataset, our method generates one effective mask for all starting point annotations, achieving a median IoU of 87.2%. On the second, our method generates effective mask annotations for 98.3% of the point annotations, achieving a median IoU of nearly 65%. This is an improvement on the baseline SAM results, where 18.4% of the annotations are successfully converted, with a median IoU of 50.4%. On the third dataset, our method converted 95% of point annotations compared to base SAM’s 79.1%, with comparable IoU.DiscussionWe introduce an efficient method, the Point-to-Polygon conversion, which can significantly accelerate the process of modernization of legacy datasets and simplifies the creation of new datasets with precise polygon annotations. The time saved by using this method to convert all point annotations in BIIGLE would be about 14,000 hours of manual work.

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#ocean data#data visualization#marine science#marine biodiversity#marine life databases#research datasets#interactive ocean maps#citizen science#Point-to-Polygon transformation#Computer Vision#Annotation Data#Legacy Data#Point Annotations#Polygon Annotations#Segment Anything Model (SAM)#Marine Science#Machine Learning#AI Tasks#Image Data#Heuristics