Zobrazeno 1 - 10
of 69
pro vyhledávání: '"Fumiki Hosoi"'
Publikováno v:
AgriEngineering, Vol 6, Iss 2, Pp 1827-1846 (2024)
This study investigated the interoperability of a tomato fruit detection model trained using nighttime images from two greenhouses. The goal was to evaluate the performance of the models in different environmets, including different facilities, culti
Externí odkaz:
https://doaj.org/article/b8dd39e62f9947f8902b6604d24f9782
Publikováno v:
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 15, Pp 555-564 (2022)
In this article, we proposed an automated tree segmentation method using light detection and ranging (LiDAR) point cloud data. Tree segmentation was performed accurately even with bumpy ground, and was validated on more than 1000 samples. For example
Externí odkaz:
https://doaj.org/article/d8e29a5702d3450d99f4d61d6cb9b27e
Autor:
Xingtong Lu, Eiichi Ono, Shan Lu, Yu Zhang, Poching Teng, Mitsuko Aono, Yo Shimizu, Fumiki Hosoi, Kenji Omasa
Publikováno v:
Plant Methods, Vol 16, Iss 1, Pp 1-16 (2020)
Abstract Background Measurement of plant structure is useful in monitoring plant conditions and understanding the responses of plants to environmental changes. 3D imaging technologies, especially the passive-SfM (Structure from Motion) algorithm comb
Externí odkaz:
https://doaj.org/article/d97eb0bc3d2047b9b4e295066075ae26
Autor:
Kenta Itakura, Fumiki Hosoi
Publikováno v:
Remote Sensing, Vol 12, Iss 6, p 988 (2020)
It is important to grasp the number and location of trees, and measure tree structure attributes, such as tree trunk diameter and height. The accurate measurement of these parameters will lead to efficient forest resource utilization, maintenance of
Externí odkaz:
https://doaj.org/article/44a92497185b4afab4763ba22a84d9c7
Publikováno v:
Remote Sensing, Vol 11, Iss 21, p 2536 (2019)
It is critical to take the variability of leaf angle distribution into account in a remote sensing analysis of a canopy system. Due to the physical limitations of field measurements, it is difficult to obtain leaf angles quickly and accurately, espec
Externí odkaz:
https://doaj.org/article/76e763b47c6b47e4a5b9dcef67ea327c
Publikováno v:
Remote Sensing, Vol 11, Iss 18, p 2134 (2019)
An image fusion method has been proposed for plant images taken using a two-dimensional (2D) camera and three-dimensional (3D) portable lidar for obtaining a 3D distribution of physiological and biochemical plant properties. In this method, a 2D mult
Externí odkaz:
https://doaj.org/article/8e69d2dc54e646a5a8b760cb21524ed3
Publikováno v:
Remote Sensing, Vol 11, Iss 12, p 1487 (2019)
There are only a few studies that have been made on accuracy assessments of Leaf Area Index (LAI) and biomass estimation using three-dimensional (3D) models generated by structure from motion (SfM) image processing. In this study, sweet potato was gr
Externí odkaz:
https://doaj.org/article/866bb6f1dc5e498eb76c7c2f7d203433
Autor:
Kenta Itakura, Fumiki Hosoi
Publikováno v:
Remote Sensing, Vol 11, Iss 3, p 344 (2019)
The leaf inclination angle is a fundamental variable for determining the plant profile. In this study, the leaf inclination angle was estimated automatically from voxel-based three-dimensional (3D) images obtained from lidar (light detection and rang
Externí odkaz:
https://doaj.org/article/e6be78c2bda74af8b18cedabc212d72f
Publikováno v:
Sensors, Vol 19, Iss 2, p 413 (2019)
Image analysis is widely used for accurate and efficient plant monitoring. Plants have complex three-dimensional (3D) structures; hence, 3D image acquisition and analysis is useful for determining the status of plants. Here, 3D images of plants were
Externí odkaz:
https://doaj.org/article/b83236c9fa384031b89b70dc8e5f0af8
Publikováno v:
Horticulturae, Vol 5, Iss 1, p 2 (2018)
To produce high-quality citrus, the harvest time of citrus should be determined by considering its maturity. To evaluate citrus maturity, the Brix/acid ratio, which is the ratio of sugar content or soluble solids content to acid content, is one of th
Externí odkaz:
https://doaj.org/article/592a2496f7f64dbda92f598709084ff2