Cross modal medical image online hash retrieval based on online semantic similarity.
10.7507/1001-5515.202409022
- Author:
Qinghai LIU
1
;
Lun TANG
1
;
Qianlin WU
1
;
Liming XU
2
;
Qianbin CHEN
1
Author Information
1. School of Communications and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, P. R. China.
2. School of Computer Science, China West Normal University, Nanchong, Sichuan 637009, P. R. China.
- Publication Type:Journal Article
- Keywords:
Cross modal retrieval;
Discrete optimization;
Medical image;
Online hashing
- MeSH:
Semantics;
Humans;
Algorithms;
Information Storage and Retrieval/methods*;
Diagnostic Imaging;
Image Processing, Computer-Assisted/methods*
- From:
Journal of Biomedical Engineering
2025;42(2):343-350
- CountryChina
- Language:Chinese
-
Abstract:
Online hashing methods are receiving increasing attention in cross modal medical image retrieval research. However, existing online methods often lack the learning ability to maintain semantic correlation between new and existing data. To this end, we proposed online semantic similarity cross-modal hashing (OSCMH) learning framework to incrementally learn compact binary hash codes of medical stream data. Within it, a sparse representation of existing data based on online anchor datasets was designed to avoid semantic forgetting of the data and adaptively update hash codes, which effectively maintained semantic correlation between existing and arriving data and reduced information loss as well as improved training efficiency. Besides, an online discrete optimization method was proposed to solve the binary optimization problem of hash code by incrementally updating hash function and optimizing hash code on medical stream data. Compared with existing online or offline hashing methods, the proposed algorithm achieved average retrieval accuracy improvements of 12.5% and 14.3% on two datasets, respectively, effectively enhancing the retrieval efficiency in the field of medical images.
