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IEEE Final Year Project Topic for CSE

Base Paper Title

Unsupervised Semantic-Preserving Adversarial Hashing for Image Search

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IEEE Project Abstract

Hashing plays a pivotal role in nearest-neighbor searching for large-scale image retrieval. Recently, deep learning based hashing methods have achieved promising performance.However, most of these deep methods involve discriminative models, which require large-scale, labeled training datasets, thushindering their real-world applications. In this paper, we propose a novel strategy to exploit the semantic similarity of the training data and design an efficient generative adversarial framework to learn binary hash codes in an unsupervised manner. Specifically,our model consists of three different neural networks: an encoder network to learn hash codes from images, a generative network to generate images from hash codes, and a discriminative network to distinguish between pairs of hash codes and images. By adversarially training these networks, we successfully learn mutually coherent encoder and generative networks and learn efficient hash codes from the encoder network. We also propose a novel strategy, which utilizes both feature and neighbor similarities, to construct a semantic similarity matrix, then use this matrix to guide the hash code learning process. Integrating the supervision of this semantic similarity matrix into the adversarial learning framework can efficiently preserve the semantic information of training data in Hamming space. Experimental results on three widely used benchmarks show that our method not only significantly outperforms several state-of-the-art unsupervised hashing methods, but also achieves comparable performance with popular supervised hashing methods.

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