We have experimentally shown that a measurement method based on time-stretched pulse (TSP) and fast Fourier transform (FFT) can reduce the data acquisition time of the complex impedance spectra of polymer light-emitting diodes (PLEDs);the data acquisition time of the present method is 3.0s while that of a conventional method using a lock-in detection technique without averaging is 48.9s. We have also demonstrated that the time required for the determination of drift mobility from the experimentally obtained complex impedance spectra is greatly reduced by a machine learning approach (the time required for the determination was 150s by means of manual analysis and 10ms by means of the machine learning approach). The measurement method using FFT and TSP and the mobility determination by the machine learning approach drastically reduced time and effort required for the determination of the electronic transport properties of organic semiconductors.

The Journal of Imaging Society of Japan featured “Recently Technology of Digital Archive” in 2012 when the supply of silver halide photographic film stocks, which had been playing a main role in the field of shooting, screening and preserving images, decreased drastically. On the other hand, it was pointed out that the weakness of digital technology is in the long-term preservation of digital data. Further, along with the evolution of digital technology, the image quality of moving images rapidly improved and the amount of digital data have increased dramatically. Besides digital images, a large number of motion picture or moving images recorded on film are waiting for digitization because of the disappearance of film theaters. Under the condition, challenges for the preservation of moving images are changing and still big problem. In this paper, diversified issues and challenges of moving image preservation are discussed.

Digital archives tend to fall into a material-centered discussion because of the emphasis on preservation of materials and the value of records, but it is also essential to consider who will use the materials and how they will be used in order to promote their utilization. In this paper, we introduce some practical examples of how digital archives of landscape photographs can contribute to considering issues and the future of local communities, which is the real world. First, the definitions of the terms “landscape” and “landscape photography” are summarized. After that, two practical examples, “Digital archiving and utilization of The Database of Railway and Bus Photos in Kyoto” and “Comparison of landscape of the past and present using smartphone application Memorygraph” are introduced, and the issues and future developments that came to light through the practical examples are discussed.

Over the past two decades, we have been developing and employing advanced imaging technologies for recording, archiving, and analyzing world class art objects and cultural heritage. During the past 4 years, we expanded our activities and currently use inhouse-developed state-of-the-art high-resolution flatbed scanning technology and high-resolution 360° panoramic VR camera system to record and create digital contents which can be viewed online or offline. As it was during the past two decades, our systems cover all aspects of digitization from 1) acquisition;2) analysis;and 3) displaying and viewing contents. In this paper, we will present actual cases of projects where we used our technology to digitally archive and create contents for different types of objects. We will put emphasis on the different platforms and systems we developed to address the needs of the digital contents communities, museums, galleries and cultural heritage communities in particular.

This article outlines a method for digital documentation of cultural heritage using three-dimensional measuring techniques. It also presents a method for utilizing the resulting digitally archived 3D data. At museums and cultural facilities, collections and research materials are digitally recorded. The documented data are collected in digital archives, including 3D measurement data. However, the digitally archived 3D data has not been accessed since there was no universal format. Until recently, hardware and software limitations have rendered the data unusable. New approaches allow us to use this 3D data to make VR (virtual reality) content, among other things. This article further explains how three-dimensional techniques apply to cultural heritage studies.

In this report, we survey trends in image processing technologies for two-dimensional and three-dimensional (3D) archiving of small insect specimens. We first review an overview of digital photo processing technologies and then describe the history, methods, current status, and future perspectives of “focus stacking” and “photogrammetry,” which are particularly important for the 3D digital archiving of specimens. In order to accurately model small objects, we combine focus stacking and photogrammetry, which we call micro-photogrammetry. The resulting photographs and 3D models created by each technology introduced in this report are available online.

3D measurement is effective for archiving cultural heritage as three-dimensional objects. By using LiDAR (light detection and ranging) scanners and 3D photogrammetry to document the shape, color, and texture of surface of object as a dense point cloud, it is available to create archival data which can examine not only the optical appearance of the object, but also the manufacturing techniques and traces of use that remain as a shape of object. Digital data enables storage and use beyond physical space despite the size and complexity of object. Individual data can also be compiled into a database as elements of large-scale features in combination, alignment, and structure. This article overviews the concept, method, use case and future perspective of cultural heritage 3D measurement.