In both terrestrial and marine ecology, physical tagging is a frequently used method to study population dynamics and behavior. However, such tagging techniques are increasingly being replaced by individual re-identification using image analysis. This paper introduces a contrastive learning-based model for identifying individuals. The model uses the first parts of the Inception v3 network, supported by a projection head, and we use contrastive learning to find similar or dissimilar image pairs from a collection of uniform photographs. We apply this technique for corkwing wrasse, Symphodus melops, an ecologically and commercially important fish species. Photos are taken during repeated catches of the same individuals from a wild population, where the intervals between individual sightings might range from a few days to several years. Our model achieves a one-shot accuracy of 0.35, a 5-shot accuracy of 0.56, and a 100-shot accuracy of 0.88, on our dataset.

CT肝图像的基于内容的图像检索（CBIR）的深度基于学习的方法是一个积极的研究领域，但受到了一些关键局限性。首先，它们非常依赖标签的数据，这可能是具有挑战性的，而且获取成本很高。其次，它们缺乏透明度和解释性，这限制了深CBIR系统的可信度。我们通过（1）提出一个自制的学习框架来解决这些局限性，该框架将领域知识纳入培训过程中，以及（2）在CT肝图像的CBIR背景下提供首次表示学习解释性分析。结果表明，与几个指标的标准自我监督方法相比，性能的提高，并且在跨数据集的概括方面得到了改善。此外，我们在CBIR的背景下进行了首次表示学习性分析，该分析揭示了对特征提取过程的新见解。最后，我们通过盘问CBIR进行了一个案例研究，该案例证明了我们提出的框架的可用性。我们认为，我们提出的框架可以在创建可信赖的深层CBIR系统中发挥至关重要的作用，这些系统可以成功利用未标记的数据。