نتایج جستجو برای: perceptual image hashing
تعداد نتایج: 428297 فیلتر نتایج به سال:
Due to the storage and retrieval efficiency, hashing has been widely deployed to approximate nearest neighbor search for large-scale multimedia retrieval. Supervised hashing, which improves the quality of hash coding by exploiting the semantic similarity on data pairs, has received increasing attention recently. For most existing supervised hashing methods for image retrieval, an image is first...
Deep Convolutional Neural Network (DCNN) based deep hashing has shown its success for fast and accurate image retrieval, however directly minimizing the quantization error in deep hashing will change the distribution of DCNN features, and consequently change the similarity between the query and the retrieved images in hashing. In this paper, we propose a novel Locality-Constrained Deep Supervis...
Learning compact representation is vital and challenging for large scale multimedia data. Cross-view/crossmodal hashing for effective binary representation learning has received significant attention with exponentially growing availability of multimedia content. Most existing crossview hashing algorithms emphasize the similarities in individual views, which are then connected via cross-view sim...
The hashing methods have attracted much attention for large scale image retrieval. Some deep hashing methods have achieved promising results by taking advantage of the better representation power of deep networks recently. However, existing deep hashing methods treat all hash bits equally. On one hand, a large number of images share the same distance to a query image because of the discrete Ham...
Image hashing is an efficient technique for indexing and can be effectively used in image retrieval .This paper uses image hashing with a ring partition and a non-negative matrix factorization(NMF),which provides rotation robustness and good discriminative capability respectively. The aim of ring partition in image hashing is to construct a rotation invariant secondary image for dimensionality ...
The paper illustrates an image hashing scheme and an image verification system based on jointed hashing and watermarking algorithms. We propose an image hashing scheme based on a set of robust features extracted from jointed DCT-DWT frequency domains and enciphered using an efficient chaotic system. The proposed hashing algorithm and a rotation-scale-translation (RST) invariant watermarking sch...
Recent years have witnessed wide application of hashing for large-scale image retrieval. However, most existing hashing methods are based on hand-crafted features which might not be optimally compatible with the hashing procedure. Recently, deep hashing methods have been proposed to perform simultaneous feature learning and hashcode learning with deep neural networks, which have shown better pe...
Objective: A variety of evidence demonstrate altered perceptual functioning during visual processing in the brain of children with autism.it possibly is related to or the cause other diagnostic symptom in autism spectrum. In the present study visual perceptual organization in autistic children is studied. These processes require central coherence and typical functional connectivity among neural...
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