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    188宝金博页面版: mult13111801_237904544

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    内容提示： Improvement of Holographic Image Considered on Chromatic Aberration of Captured Image by Integral Photography Naoki Hirata 1,2 , Tomoki Hayashi 1,2 , Yasuyuki Ichihashi 2 , Kenji Yamamoto 2 , Takashi Kakue 1 , Tomoyoshi Shimobaba 1 and Tomoyoshi Ito 1 1 Department of Electrical and Electronic Engineering, Graduate School of Engineering Chiba University Chiba, Japan 2 Universal Communication Research Institute National Institute of Information and communications Technology (NICT) Koganei, Japan Abstra...

    文档格式：PDF | 页数：4 | 浏览次数：4 | 上传日期：2020-08-08 10:37:56 | 文档星级：
    Improvement of Holographic Image Considered on Chromatic Aberration of Captured Image by Integral Photography Naoki Hirata 1,2 , Tomoki Hayashi 1,2 , Yasuyuki Ichihashi 2 , Kenji Yamamoto 2 , Takashi Kakue 1 , Tomoyoshi Shimobaba 1 and Tomoyoshi Ito 1 1 Department of Electrical and Electronic Engineering, Graduate School of Engineering Chiba University Chiba, Japan 2 Universal Communication Research Institute National Institute of Information and communications Technology (NICT) Koganei, Japan Abstract— We propose a method for improving chromatic aberrations of a captured image by integral photography. In our method, we offset the shift of the color components. We confirmed that our method can improve chromatic aberrations of reconstructed images. Keywords-holography; integral photography; three-dimensional imageing I. I NTRODUCTION Electronic holography is an ideal technique to record and reconstruct three-dimensional (3D) scenes by using interference and diffraction of light [1-4]. We must record 3D scenes on a hologram in a darkroom because of using coherent lights in digital holography. Therefore, the recording conditions are very severe. On the other hand, the method using integral photography (IP) surmounts these weak points. In order to realize a real-time reconstruction of 3D live scenes in electronic holography, a method for capturing 3D objects under the natural light by integral photography was proposed [5]. Currently a real-time capturing and reconstructing system for 8K electronic holography was developed by a combination of that method and graphics processing units [6]. In integral photography, the 3D information of objects is captured through a lens array on an image, and that is called an IP image. When the IP image is captured by a video camera, the size of an image sensor of that camera is generally smaller than that of a lens array or the IP image. So the IP image is demagnified by a field lens for capturing by the video camera. Then, aberrations of both the lens array and the field lens cause color blurs of the captured IP image. Consequently, the color blurs of the captured IP image result in that of reconstructed 3D images in electronic holography. In this paper, we report a method which can improve the color blurs of the 3D images by correcting chromatic aberrations of the captured IP image. II. I NTEGRAL P HOTOGRAPHY AND E LECTRONIC H OLOGRAPHY A. Capturing and Reconstructing of Iintegral Photography Integral photography is a method of capturing and reconstructing technique on media, such as photographic plate [7].Figure 1 shows how to capture a 3D image in integral photography. When we capture an object through a lens-array, composed of small lenses called as elemental lenses, the information of an object called “IP image” is captured in reverse on a record surface. The image captured through each elemental lens is called “elemental image”. Therefore, the IP image is consisted of the elemental images. In the case that the distance between the object and the record surface is equal to the focal length of the elemental lens, the size of the elemental image is equal to that of the elemental lens. Figure 2 shows the method of reconstructing a 3D image from the IP image. When seeing the IP image with reversed elemental images through the lens array, we can observe a virtual image as a reconstruction image on the previous position of the 3D object. Figure 1. Capturing in integral photography Proceedings of 3DSA2013, S8-21Zhejiang University of Media and Communications (218.75.124.130) - 2014/10/8 Download

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