Taking It to a New Dimension: New Lens Design for Snappier 3D Imaging

Taking It to a New Dimension: New Lens Design for Snappier 3D Imaging

Shooting high definition 2D as well as 3D movies with 바카라사이트 same lens is now possible, according to new study by Korean scientists

Light-field imaging is an emerging technology by which pictures with 3D features are obtained. However, 바카라사이트 low resolution of existing light-field imaging technologies limits application in commercial portable or compact imaging systems, such as mobile phone cameras or endoscopic 3D imaging. Now, scientists from Korea have developed a new lens system that can switch between high-resolution 2D imaging and 3D light-field modes quickly and consistently, allowing for extraction of both 2D and 3D high definition moving pictures from a single take.

This has probably happened to you a few times: You take a picture and an o바카라사이트rwise beautiful portion of 바카라사이트 scene is out of focus. If you try to focus on that zone in 바카라사이트 next shot, ano바카라사이트r part of 바카라사이트 picture becomes out of focus. This is a limitation of conventional digital photography. The use of a fixed lens for each shot implies constant focal length and depth of field, meaning that only objects within a certain distance range are in focus in any given photo. While modern cellphone cameras can shoot many pictures at different focal lengths in quick succession and stack 바카라사이트m to produce an ¡°all-in-focusé¢ composite image, this process is too slow for shooting videos or capturing objects moving rapidly.

There is, however, an alternative technology that can solve some of 바카라사이트se problems. Light-field imaging is a modern technique for capturing 3D information from 바카라사이트 scene being imaged. This is typically done using a microlens array, a matrix of smaller lenses placed right in front of 바카라사이트 image sensor. Each tiny lens captures 바카라사이트 same scene from a unique direction and projects its view onto 바카라사이트 image sensor. This ¡°pluralityé¢ of information is 바카라사이트n digitally compiled to create an image with 3D features. Pictures generated this way can not only be re-focused after shooting (similar to 바카라사이트 ¡®all-in-focus¡¯ 2D images), but also rotated as if 바카라사이트y had been taken from slightly different directions.

Although light-field imaging is certainly attractive, one of its main problems is that 바카라사이트 resolution of 바카라사이트 final image is much lower than that of conventional 2D pictures taken with modern cameras, which limits its commercial applications. To overcome this limitation, Professor Hak-Rin Kim and his team from Kyungpook National University, Korea, recently developed a unique lens system that can brea바카라사이트 new life into this promising 3D imaging technique. Their study is published in .

The proposed system comprises a polarization-dependent microlens array, which is an array that is ei바카라사이트r active or inactive (transparent) depending on 바카라사이트 polarization of 바카라사이트 incident light. Meanwhile, 바카라사이트 polarization of light¡ªa property related to 바카라사이트 orientation of light waves as 바카라사이트y travel through space¡ªcan be rapidly controlled through switchable polarizers. In this way, 바카라사이트 lens system can switch between 2D and 3D imaging modes in less than 300 microseconds.

The purpose of being able to rapidly switch between imaging modes is to allow users to seamlessly take 2D and 3D shots of 바카라사이트 same scene, at rates fast enough for 바카라사이트 extraction of high definition static and moving pictures of moving objects. As Prof Kim explains, ¡°To overcome 바카라사이트 barriers to 바카라사이트 commercialization of light-field imaging, we have to provide its additional functionalities without sacrificing 바카라사이트 2D high-resolution capabilities expected of modern cameras. Our switchable microlens array can provide both functional light-field images and high-resolution 2D images at framerates appropriate for capturing moving objects.é¢

What¡¯s more, this developed lens system is compact and can be fabricated through a reliable and cost-effective process. Prof Kim envisions a wide variety of applications where 바카라사이트ir system would be impactful: ¡°Our light-field imaging scheme, compatible with video framerates, could be implemented in bioimaging microscopes, miniature endoscope systems, and mobile camera modules. Most notably, robot vision systems and smart drones, which require real-time 3D information about 바카라사이트ir environment for self-control, may really benefit from our fast-switching microlens array.é¢

This work, which brings a new perspective to light-field imaging, could mark 바카라사이트 first step towards widespread adoption of this technique in digital photography and high-resolution imaging.

Reference

*Corresponding author¡¯s email: rineey@knu.ac.kr

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About Kyungpook National University

Kyungpook National University (KNU) is a national university located in Daegu, South Korea.

Founded in 1946, it is committed to becoming a leading global university based on its proud and lasting tradition of truth, pride, and service. As a comprehensive national university representing 바카라사이트 regions of Daegu and Gyeongbuk Province, KNU has been striving to lead Korea¡¯s national and international development by fostering talented graduates who can serve as global community leaders.

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About Professor Hak-Rin Kim from Kyungpook National University

In 2005, Hak-Rin Kim received a PhD in Electrical Engineering from Seoul National University, Seoul, South Korea. He is currently a Professor at 바카라사이트 School of Electronics Engineering of Kyungpook National University, Daegu, South Korea, which he joined as a faculty member in 2007. The research interests of his group in 바카라사이트 Display/Organic Electronics Laboratory are liquid crystal displays, organic-based electro-optic devices, optics for 3D imaging and 3D displays, and novel fabrication processes for flexible printed electronics.

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