Ryoji Ohba

415 total citations
28 papers, 288 citations indexed

About

Ryoji Ohba is a scholar working on Computer Vision and Pattern Recognition, Mechanical Engineering and Electrical and Electronic Engineering. According to data from OpenAlex, Ryoji Ohba has authored 28 papers receiving a total of 288 indexed citations (citations by other indexed papers that have themselves been cited), including 10 papers in Computer Vision and Pattern Recognition, 10 papers in Mechanical Engineering and 10 papers in Electrical and Electronic Engineering. Recurrent topics in Ryoji Ohba's work include Advanced Measurement and Metrology Techniques (9 papers), Optical measurement and interference techniques (9 papers) and Digital Filter Design and Implementation (4 papers). Ryoji Ohba is often cited by papers focused on Advanced Measurement and Metrology Techniques (9 papers), Optical measurement and interference techniques (9 papers) and Digital Filter Design and Implementation (4 papers). Ryoji Ohba collaborates with scholars based in Japan and Australia. Ryoji Ohba's co-authors include Ishtiaq Rasool Khan, Qian Liu, Takeo Hondoh, Masahiro Okuda, Masahiro Watari, Nobukatsu Takai, Kunihiko Mori, Yaping Shao, Hidehiro Watanabe and Hironori Yamada and has published in prestigious journals such as Japanese Journal of Applied Physics, Optics Communications and Journal of Computational and Applied Mathematics.

In The Last Decade

Ryoji Ohba

26 papers receiving 267 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Ryoji Ohba Japan 9 79 77 54 54 47 28 288
Patrick Witomski France 7 52 0.7× 47 0.6× 63 1.2× 18 0.3× 14 0.3× 18 257
Hong Xiao United States 8 49 0.6× 40 0.5× 107 2.0× 29 0.5× 65 1.4× 15 326
Brian J. McCartin United States 12 118 1.5× 36 0.5× 107 2.0× 118 2.2× 102 2.2× 54 488
Kurt Jetter Germany 11 17 0.2× 73 0.9× 224 4.1× 80 1.5× 20 0.4× 34 442
V. A. Ditkin Israel 6 37 0.5× 18 0.2× 31 0.6× 57 1.1× 66 1.4× 8 455
Elías Wegert Germany 10 14 0.2× 28 0.4× 62 1.1× 46 0.9× 25 0.5× 53 473
R.F. Hoskins United Kingdom 9 36 0.5× 18 0.2× 19 0.4× 23 0.4× 24 0.5× 21 317
Ivan Slapničar Croatia 13 58 0.7× 38 0.5× 38 0.7× 155 2.9× 90 1.9× 36 447
Kenneth L. Bowers United States 13 49 0.6× 39 0.5× 145 2.7× 362 6.7× 67 1.4× 25 685
Fritz Keinert United States 8 16 0.2× 148 1.9× 39 0.7× 20 0.4× 14 0.3× 20 320

Countries citing papers authored by Ryoji Ohba

Since Specialization
Citations

This map shows the geographic impact of Ryoji Ohba's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ryoji Ohba with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryoji Ohba more than expected).

Fields of papers citing papers by Ryoji Ohba

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryoji Ohba. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ryoji Ohba. The network helps show where Ryoji Ohba may publish in the future.

Co-authorship network of co-authors of Ryoji Ohba

This figure shows the co-authorship network connecting the top 25 collaborators of Ryoji Ohba. A scholar is included among the top collaborators of Ryoji Ohba based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ryoji Ohba. Ryoji Ohba is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Khan, Ishtiaq Rasool, Masahiro Okuda, & Ryoji Ohba. (2004). Design of FIR Digital Differentiators Using Maximal Linearity Constraints. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 87(8). 2010–2017. 5 indexed citations
2.
Khan, Ishtiaq Rasool & Ryoji Ohba. (2003). Taylor series based finite difference approximations of higher-degree derivatives. Journal of Computational and Applied Mathematics. 154(1). 115–124. 27 indexed citations
3.
Ohba, Ryoji, et al.. (2003). Practical Accurate Optical Ranging Based on Polarization Self Modulation of a Vertical-Cavity Surface-Emitting Laser Diode. Optical Review. 10(6). 511–513. 5 indexed citations
4.
Khan, Ishtiaq Rasool, et al.. (2002). Mathematical proof of closed form expressions for finite difference approximations based on Taylor series. Journal of Computational and Applied Mathematics. 150(2). 303–309. 23 indexed citations
5.
Khan, Ishtiaq Rasool & Ryoji Ohba. (2001). Mathematical Proof of Explicit Formulas for Tap-Coefficients of Taylor Series Based FIR Digital Differentiators. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 84(6). 1581–1584. 6 indexed citations
6.
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8.
Khan, Ishtiaq Rasool & Ryoji Ohba. (2001). New designs of low/high‐pass and mid‐pass/stop FIR digital filters. International Journal of Circuit Theory and Applications. 29(4). 423–431. 2 indexed citations
9.
Khan, Ishtiaq Rasool & Ryoji Ohba. (2000). New finite difference formulas for numerical differentiation. Journal of Computational and Applied Mathematics. 126(1-2). 269–276. 40 indexed citations
10.
Liu, Qian, et al.. (2000). Effects of unparallel grating planes in Talbot interferometry II. Applied Optics. 39(13). 2084–2084. 14 indexed citations
11.
Ohba, Ryoji, et al.. (2000). A simple real-time method for checking parallelism between the two gratings in Talbot interferometry. Optics Communications. 175(1-3). 19–26. 7 indexed citations
12.
Khan, Ishtiaq Rasool & Ryoji Ohba. (1999). Digital Differentiators Based on Taylor Series. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 82(12). 2822–2824. 29 indexed citations
13.
Khan, Ishtiaq Rasool & Ryoji Ohba. (1999). Closed-form expressions for the finite difference approximations of first and higher derivatives based on Taylor series. Journal of Computational and Applied Mathematics. 107(2). 179–193. 58 indexed citations
14.
Liu, Qian & Ryoji Ohba. (1999). Effects of unparallel grating planes in Talbot interferometry. Applied Optics. 38(19). 4111–4111. 20 indexed citations
15.
Ohtsuka, Takashi, et al.. (1995). Machine Diagnosis Using Acoustic Signal Processing Techniques and Special Sound Collecting Hood. IEICE Transactions on Fundamentals of Electronics Communications and Computer Sciences. 78(12). 1627–1633.
16.
Mori, Kunihiko & Ryoji Ohba. (1994). Optical Hough-transform processor with a two-dimensional array of computer-generated holograms. Applied Optics. 33(14). 3111–3111. 2 indexed citations
17.
Ohba, Ryoji, et al.. (1986). Estimation of poles and zeros of voiced speech using group delay characteristics derived from spectral envelopes. Electronics and Communications in Japan (Part I Communications). 69(3). 38–44. 1 indexed citations
18.
Ohba, Ryoji, Hironori Yamada, & Hidehiro Watanabe. (1984). Automated Indexing of X-Ray Laue Spots for Arbitrary Lattices. Japanese Journal of Applied Physics. 23(5R). 652–652. 1 indexed citations
19.
Ohba, Ryoji, et al.. (1981). Computer-Aided Spot Indexing for X-Ray Laue Patterns. Japanese Journal of Applied Physics. 20(5). 811–811. 8 indexed citations
20.
Watari, Masahiro, et al.. (1975). Vehicular Speed Measurement by Correlation Techniques. Transactions of the Society of Instrument and Control Engineers. 11(4). 473–478. 6 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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