Publications by Year: 2017

Aloni, D., Jung, J. - H., & Yitzhaky, Y. (2017). 3D noise-resistant segmentation and tracking of unknown and occluded objects using integral imaging. In H. Bouma, F. Carlysle-Davies, R. J. Stokes, & Y. Yitzhaky (Ed.), Counterterrorism, Crime Fighting, Forensics, and Surveillance Technologies (Vol. 10441, pp. 123 – 129) . International Society for Optics and Photonics. Publisher's VersionAbstract
Three dimensional (3D) object segmentation and tracking can be useful in various computer vision applications, such as: object surveillance for security uses, robot navigation, etc. We present a method for 3D multiple-object tracking using computational integral imaging, based on accurate 3D object segmentation. The method does not employ object detection by motion analysis in a video as conventionally performed (such as background subtraction or block matching). This means that the movement properties do not significantly affect the detection quality. The object detection is performed by analyzing static 3D image data obtained through computational integral imaging With regard to previous works that used integral imaging data in such a scenario, the proposed method performs the 3D tracking of objects without prior information about the objects in the scene, and it is found efficient under severe noise conditions.
Peli, E., & Jung, J. - H. (2017). Multiplexing Prisms for Field Expansion. Optometry and Vision Science , 94 (8), 817-829. Publisher's VersionAbstract
PURPOSEPrisms used for field expansion are limited by the optical scotoma at a prism apex (apical scotoma). For a patient with two functioning eyes, fitting prisms unilaterally allows the other eye to compensate for the apical scotoma. A monocular patient’s field loss cannot be expanded with a conventional or Fresnel prism because of the apical scotoma. A newly invented optical device, the multiplexing prism (MxP), was developed to overcome the apical scotoma limitation in monocular field expansion.METHODSA Fresnel–prism–like device with alternating prism and flat elements superimposes shifted and see-through views, thus creating the (monocular) visual confusion required for field expansion and eliminating the apical scotoma. Several implementations are demonstrated and preliminarily evaluated for different monocular conditions with visual field loss. The field expansion of the MxP is compared with the effect of conventional prisms using calculated and measured perimetry.RESULTSField expansion without apical scotomas is shown to be effective for monocular patients with hemianopia or constricted peripheral field. The MxPs are shown to increase the nasal field for a patient with only one eye and for patients with bitemporal hemianopia. The MxPs placed at the far temporal field are shown to expand the normal visual field. The ability to control the contrast ratio between the two images is verified.CONCLUSIONSA novel optical device is demonstrated to have the potential for field expansion technology in a variety of conditions. The devices may be inexpensive and can be constructed in a cosmetically acceptable format.
Jung, J. - H., Kurukuti, N. M., & Peli, E. (2017). 3D-printed clip-on multiplexing prism holder for field expansion in acquired monocular vision. In Academy 2017 of American Academy of Optometry . Chicago, IL.
Jung, J. - H., Qiu, C., & Peli, E. (2017). Background de-cluttering for object recognition in video-based visual prostheses. 10th The Eye and The Chip World Research Congress . Detroit, MI.
Qiu, C., Jung, J. - H., & Peli, E. (2017). Motion Parallax in Prosthetic Vision. In 6th Military Vision Symposium on Ocular and Vision Injury.
Mostofi, N., Peli, E., & Jung, J. - H. (2017). Confocal image generation from light-fieldusing GPU for backgroundde-cluttering in visual prostheses. In 6th Military Vision Symposium on Ocular and Vision Injury.
Jung, J. - H., & Peli, E. (2017). Analysis of Light-field imaging for background de-cluttering in visual prostheses. In 6th Military Vision Symposium on Ocular and Vision Injury.