2026-06-01T10:45:52Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/365292026-02-03T11:03:31Zcom_10630_2254col_10630_37953

A Convolutional Autoencoder and a Neural Gas model based on Bregman Divergences for Hierarchical Color Quantization Fernández-Rodríguez, Jose David Palomo-Ferrer, Esteban José Benito-Picazo, Jesús Domínguez-Merino, Enrique López-Rubio, Ezequiel Ortega-Zamorano, Francisco Procesado de imágenes - Técnicas digitales Color Color quantization (CQ) is one of the most common and important procedures to be performed on digital images. In this paper, a new approach to hierarchical color quantization is described, presenting a novel neural network architecture integrated by a convolutional autoencoder and a Growing Hierarchical Bregman Neural Gas (GHBNG). GHBNG is a CQ algorithm that allows the compression of an image by choosing a reduced set of the most representative colors to generate a high-quality reproduction of the original image. In the technique proposed here, an autoencoder is used to translate the image into a latent representation with higher per-pixel dimensionality but reduced resolution, and GHBNG is then used to quantize it. Experimental results confirm the performance of this technique and its suitability for tasks related to color quantization. 2025-01-20T08:17:41Z 2025-01-20T08:17:41Z 2023 journal article José David Fernández-Rodríguez, Esteban J. Palomo, Jesús Benito-Picazo, Enrique Domínguez, Ezequiel López-Rubio, Francisco Ortega-Zamorano, A convolutional autoencoder and a neural gas model based on Bregman divergences for hierarchical color quantization, Neurocomputing, Volume 544, 2023, 126288, ISSN 0925-2312, https://doi.org/10.1016/j.neucom.2023.126288. (https://www.sciencedirect.com/science/article/pii/S0925231223004113) https://hdl.handle.net/10630/36529 10.1016/j.neucom.2023.126288 eng http://creativecommons.org/licenses/by-nc-nd/4.0/ open access Attribution-NonCommercial-NoDerivatives 4.0 Internacional Elsevier