{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T13:54:30Z","timestamp":1776088470395,"version":"3.50.1"},"reference-count":0,"publisher":"Slovenian Association Informatika","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJCAI"],"abstract":"<jats:p>Content-Based Image Retrieval (CBIR) systems critically depend on discriminative yet efficient feature representations to retrieve relevant images from large-scale databases. However, many existing handcrafted and graph-based methods face limitations in scalability and in jointly modeling multimodal information such as color, texture, and spatial relationships. To address these challenges, this paper proposes a novel feature extraction framework termed Multi-modal Graph Color SIFT (MGC-SIFT). In the proposed approach, color-augmented SIFT descriptors extracted in the YCbCr color space are organized as a graph of local keypoints, over which Graph Neural Networks (GNNs) are applied to model inter-keypoint spatial relationships. An attention mechanism is incorporated to emphasize discriminative keypoint regions, while proxy-based learning is employed to improve representation compactness and retrieval efficiency.The effectiveness of MGC-SIFT is evaluated on four benchmark datasets\u2014Corel-1K, COIL-20, Oxford-102 Flowers, and UC-Merced Land Use\u2014covering natural scenes, controlled object images, fine-grained categories, and aerial imagery. Experimental evaluation using standard CBIR metrics, including mean Average Precision (mAP), Precision@k, Recall@k, F1-score@k, and Accuracy@k, demonstrates that the proposed method achieves consistent and competitive retrieval performance across heterogeneous datasets, including robustness under image degradation conditions. Ablation studies further confirm the complementary contributions of color augmentation, graph-based modeling, attention mechanisms, and proxy-based learning. In addition, runtime and memory analysis indicate that proxy-based learning significantly reduces retrieval latency, supporting scalable image retrieval.Overall, the proposed MGC-SIFT framework provides a robust and interpretable multimodal representation for CBIR by explicitly modeling joint color\u2013spatial dependencies at the local keypoint level, offering a practical solution for scalable image retrieval in real-world applications.<\/jats:p>","DOI":"10.31449\/inf.v50i1.10558","type":"journal-article","created":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T13:05:50Z","timestamp":1776085550000},"source":"Crossref","is-referenced-by-count":0,"title":["MGC-SIFT: A Multimodal Graph-Based Color SIFT Descriptor for Content-Based Image Retrieval"],"prefix":"10.31449","volume":"50","author":[{"given":"Trupti Babasaheb","family":"Ghatage","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Dattatraya Vishnu","family":"Kodavade","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"16141","published-online":{"date-parts":[[2026,4,13]]},"container-title":["Informatica"],"original-title":[],"link":[{"URL":"https:\/\/www.informatica.si\/index.php\/informatica\/article\/download\/10558\/6603","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/www.informatica.si\/index.php\/informatica\/article\/download\/10558\/6603","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T13:05:51Z","timestamp":1776085551000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.informatica.si\/index.php\/informatica\/article\/view\/10558"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4,13]]},"references-count":0,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2026,4,13]]}},"URL":"https:\/\/doi.org\/10.31449\/inf.v50i1.10558","relation":{},"ISSN":["1854-3871","0350-5596"],"issn-type":[{"value":"1854-3871","type":"electronic"},{"value":"0350-5596","type":"print"}],"subject":[],"published":{"date-parts":[[2026,4,13]]}}}