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Content-Based Image Retrieval (CBIR) systems havebeen developed aiming at enabling users to search and retrieve images based on their properties such as shape, color and texture. In this paper, we are concerned with shapebased image retrieval. Here, we discuss a recently proposed shape descriptor, called contour saliences, defined as the influence areas of its higher curvature points. This paper introduces a robust approach to estimate contour saliences by exploiting the relation between a contour and its skeleton, modifies the original definition to include the location and the value of saliences along the contour, and proposes a new metric to compare contour saliences. The paper also evaluates the effectiveness of the proposed descriptor with respect to Fourier Descriptors, Curvature Scale Space and Moment Invariants.

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This article proposes a comparative analysis between public and regulatory policies for implementing microgeneration and mini generation in Brazilian and German markets. The research was developed based on scientific texts and legal orders. Distributed microgeneration and mini generation are becoming a reality in Brazil. The current regulatory framework for distributed generation, effective from January 2022, promises to update the legislation and promote renewable energy. Since Brazilian legislation is still in its infancy, it is essential to compare it with other places where laws and regulations have already undergone several changes so we can learn from its mistakes and successes.