[in Japanese]

View full abstract

FUJIFILM GFX100RF is the first fixed-lens camera in the GFX Series, equipped with a 102-megapixel large-format image sensor. This paper describes the development background that led to the final product specification under the concept of “a GFX camera that can be carried anywhere,” the lens and body design that achieved compactness through a fixed-lens architecture and various design measures, and the optical technologies that deliver high image quality through the use of aspherical lens elements and Nano GI coating. In addition, a new shooting experience en-abled by the Aspect Ratio Dial and Digital Teleconverter Lever is presented.

View full abstract

OM Digital Solutions has released the “M.ZUIKO DIGITAL ED 50-200 mm F2.8 IS PRO,” a large-aperture super-tele-photo zoom lens that covers a focal length range equivalent to 100–400 mm in the 35 mm format while maintaining a constant maximum aperture of F2.8 throughout the zoom range. By leveraging the advantages of the Micro Four Thirds System, this lens achieves both high optical performance and a compact, lightweight design. This paper de-scribes the vision of the OM SYSTEM brand, the positioning of this product, and the technologies used to realize both high image quality and mobility.

View full abstract

The EOS R1 is a full-frame mirrorless camera developed as the flagship model of the EOS R system, with the aim of achieving high-speed performance, subject capture capability, and reliability required in professional shooting environ-ments. By combining a newly developed full-frame back-illuminated stacked CMOS sensor（approximately 24.2 megapixels effective）with a new imaging engine system consisting of the DIGIC Accelerator and DIGIC X, the cam-era achieves both reduced distortion during electronic shutter shooting and high-speed continuous shooting. The autofocus（AF）system incorporates not only Dual Pixel CMOS AF but also cross-type AF capable of detecting both vertical and horizontal lines, thereby improving subject detection and tracking performance in moving subject photography in conjunction with enhanced algorithms. Furthermore, improvements in the eye-controlled AF function enable more intuitive subject selection in accordance with the photographer’s intent. In addition to shooting performance, the EOS R1 is designed with consideration for post-capture data handling and workflow optimization, realizing a system configuration suitable for professional use that integrates both still images and video. This paper describes the development objectives, system overview, and key technologies of the EOS R1.

View full abstract

This.study.aims.to.evaluate.the.practicality.and.measurement.accuracy.of.a.handheld.LiDAR.system.in.a.narrow.and.low-light. cave. environment,. focusing. on. Kura. Cave. located. on. Iriomote. Island,. Okinawa,. Japan.. Conventional. terres-trial.laser.scanners（TLS）often.face.limitations.in.cave.surveys.due.to.installation.constraints.and.restricted.line-of-sight. conditions.. In. contrast,. the. portable. LiDAR. system. enabled. continuous. acquisition. of. high-density. three-dimen-sional.point.clouds.within.the.cave.interior,.allowing.detailed.visualization.of.its.spatial.structure.. .The. relative. coordinates. obtained. through. SLAM（Simultaneous. Localization. and. Mapping）were. transformed. into.an.absolute.coordinate.system.using.RTK-GNSS.control.points.and.a.Helmert.transformation..Accuracy.was.evaluat-ed.based.on.the.RMS.error.after.transformation..Both.single-direction.scans.without.loop.closure.and.loop-closure.tra-jectory. scans. were. analyzed.. The. results. indicate. that. RMS. errors. of. approximately. 5.5.cm. were. achieved. in. open-sky. conditions,. while. errors. of. approximately. 9.cm. were. obtained. in. the. narrow. cave. environment.. These. findings.demonstrate.that.practical.centimeter-level.accuracy.can.be.maintained.even.under.long-distance,.non-closed.trajecto-ry. conditions.. Under. loop-closure. conditions,. larger. transformation. errors. were. observed,. suggesting. that. trajectory.length.and.control-point.configuration.influence.the.final.accuracy.and.that.further.optimization.of.SLAM.processing.and.coordinate.transformation.is.required.. .Furthermore,.integration.with.UAV-based.aerial.photogrammetry.enabled.construction.of.a.unified.three-dimensional.model.from.the.cave.interior.to.the.ground.surface..The.results.demonstrate.that.handheld.LiDAR.provides.an.effec-tive,.non-contact,.and.non-destructive.method.for.high-resolution.3D.documentation.in.confined.environments,.comple-menting.TLS.approaches.and.offering.potential.applications.in.environmental.conservation,.geomorphological.monitor-ing,.and.cultural.heritage.archiving.

View full abstract