Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Takeshi Kojima"'
Publikováno v:
Journal of Imaging, Vol 10, Iss 8, p 178 (2024)
Computed tomography (CT) imaging plays a crucial role in various medical applications, but noise in projection data can significantly degrade image quality and hinder diagnosis accuracy. Iterative algorithms for tomographic image reconstruction outpe
Externí odkaz:
https://doaj.org/article/969894198cd747b7b8041da31d22e2ab
Autor:
Takeshi Kojima, Tetsuya Yoshinaga
Publikováno v:
Algorithms, Vol 16, Iss 1, p 60 (2023)
Recently, an extended family of power-divergence measures with two parameters was proposed together with an iterative reconstruction algorithm based on minimization of the divergence measure as an objective function of the reconstructed images for co
Externí odkaz:
https://doaj.org/article/d6008e949f4841e4b0aca054c53afe81
Publikováno v:
Mathematics, Vol 10, Iss 22, p 4277 (2022)
Iterative image reconstruction algorithms have considerable advantages over transform methods for computed tomography, but they each have their own drawbacks. In particular, the maximum-likelihood expectation-maximization (MLEM) algorithm reconstruct
Externí odkaz:
https://doaj.org/article/8b6db555421a4def9a332b681f2d305a
Publikováno v:
Insects, Vol 13, Iss 8, p 678 (2022)
Pyrethrum is a botanical insecticide derived from pyrethrum flowers. Feeding deterrence caused by pyrethrum has been reported in several sucking insects; however, there is no account of the cause of deterrence—whether from a single component or the
Externí odkaz:
https://doaj.org/article/a918ad138ad048239ffed65c13df5427
Publikováno v:
Entropy, Vol 24, Iss 5, p 740 (2022)
Iterative reconstruction of density pixel images from measured projections in computed tomography has attracted considerable attention. The ordered-subsets algorithm is an acceleration scheme that uses subsets of projections in a previously decided o
Externí odkaz:
https://doaj.org/article/b00e4c3fe1474193bfc47cb7453cdb71
Publikováno v:
Entropy, Vol 23, Iss 8, p 1005 (2021)
The problem of tomographic image reconstruction can be reduced to an optimization problem of finding unknown pixel values subject to minimizing the difference between the measured and forward projections. Iterative image reconstruction algorithms pro
Externí odkaz:
https://doaj.org/article/5941a80eec7d41a19d25549b5ea0395b
Publikováno v:
New Generation Computing. 41:5-24
Vision Transformer (ViT) is becoming more and more popular in the field of image processing. This study aims to improve the robustness against the unknown perturbations without retraining the ViT model from scratch. Since our approach does not alter
Autor:
Ryoichi Kuratani, Takeshi Kojima, Haruka Fujii, Shunsuke Matoba, Yumi Saitoh, Kanji Takanishi
Publikováno v:
Transactions of the Institute of Systems, Control and Information Engineers. 35:118-125
Autor:
Takeshi KOJIMA
Publikováno v:
EU Studies in Japan. 2021:152-176
Publikováno v:
Journal of Signal Processing. 24:183-186