Results 241 to 250 of about 170,509 (285)

A Chunk-Based Hash Table Caching Method for In-Memory Hash Joins

2020
In-memory query processing can be accelerated by caching intermediate query results. Among various types of intermediate results, hash tables used by hash join are ideal objects for caching, as they can benefit a wide range of queries. In this paper, we introduce a fine-grained hash table caching method to benefit the hash-join operator. Our insight is
Xing Wei, Huiqi Hu, Xuan Zhou, Aoying Zhou   +3 more
openaire   +1 more source

Multimedia stream hashing: A forensic method for content verification

Journal of Forensic Sciences, 2022
AbstractForensic examination of digital audio, video, and images frequently requires transforming multimedia data from one format to another. The transformative activity may cause changes to the administrative elements of the file but leave the multimedia streams unchanged and intact.
Gregory S. Wales, Jeff M. Smith, Douglas S. Lacey, Catalin Grigoras   +3 more
openaire   +2 more sources

Spark Based Text Clustering Method Using Hashing

2021
Text clustering has become an important task in machine learning since several micro-blogging platforms such as Twitter require efficient clustering methods to discover topics. In this context, we propose in this paper a new Spark based text clustering method using hashing.
Mohamed Aymen Ben HajKacem, Chiheb-Eddine Ben N’Cir, Nadia Essoussi   +2 more
openaire   +1 more source

Piecewise Hashing: A Deep Hashing Method for Large-Scale Fine-Grained Search

2020
Fine-grained search task such as retrieving subordinate categories of birds, dogs or cars, has been an important but challenging problem in computer vision. Although many effective fine-grained search methods were developed, with the amount of data increasing, previous methods fail to handle the explosive fine-grained data with low storage cost and ...
Yimu Wang, Xiu-Shen Wei, Bo Xue, Lijun Zhang   +3 more
openaire   +1 more source

Image hash generation method using hierarchical histogram

Multimedia Tools and Applications, 2011
Recently, web applications, such as Stock Image and Image Library, are developed to provide the integrated management for user's images. Image hashing techniques are used for the image registration, management and retrieval as the identifier also, investigations have been performed to raise the hash performance like discernment.
Yong Soo Choi, Jong Hyuk Park
openaire   +1 more source

Locality Preserving Hashing Method for Image Retrieval

Proceedings of International Conference on Internet Multimedia Computing and Service, 2014
Binary hashing is widely used in efficient similarity computing for image/video search. In this work, we propose a Locality Preserving Hashing (LPH) method to improve the image retrieval performance, we first project high-dimensional feature space into low dimension using locality preserving method, in which the locality properties can be well ...
Qiang Li, Yahong Han, Jianwu Dang
openaire   +1 more source

Hash table methods for case statements

Proceedings of the 20th annual Southeast regional conference on - ACM-SE 20, 1982
The CASE statement evaluates an expression, selects an action according to the value of the expression and then executes the action. The most efficient runtime behavior is exhibited when the action can be selected via a jump table, which provides an entry for every possible value in the range of the expression but has execution time that is constant as
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A memorability based method for video hashing

2015 IEEE 16th International Conference on Communication Technology (ICCT), 2015
In this paper, a memorability feature based-video hashing is proposed as an alternative to appearance feature and visual attention based-algorithms. Inspired by our previous study which shows spatial histograms based on visual attention have positive influence on predicting image memorability, we propose to define the memory feature (MF) and use it to ...
null Wulin Wang, null Jiande Sun, null Ju Liu   +2 more
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A Mixed Generative-Discriminative Based Hashing Method

2017 IEEE 33rd International Conference on Data Engineering (ICDE), 2017
Hashing methods have proven to be useful for a variety of tasks and have attracted extensive attention in recent years. Various hashing approaches have been proposed to capture similarities between textual, visual, and cross-media information. However, most of the existing works use a bag-of-words methods to represent textual information.
Qi Zhang, Yang Wang, Jin Qian, Binbin Deng, Xuanjing Huang   +4 more
openaire   +1 more source

A Mixed Generative-Discriminative Based Hashing Method

IEEE Transactions on Knowledge and Data Engineering, 2016
Hashing methods have proven to be useful for a variety of tasks and have attracted extensive attention in recent years. Various hashing approaches have been proposed to capture similarities between textual, visual, and cross-media information. However, most of the existing works use a bag-of-words methods to represent textual information.
Qi Zhang, Yang Wang, Jin Qian, Xuanjing Huang   +3 more
openaire   +1 more source