Development of the Imaging System Based on the Human Visual System.

基于人类视觉系统的成像系统的开发。

• 批准号: 05650037
• 负责人: OHYAMA Nagaaki
• 金额: $ 1.41万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650037/
• 关键词: imaging system; electric camera; image restoration; image reconstruction; liquid crystal lens; computer vision; continuous-discrete model; electrical zoom; カラー画像処理; 電子ズーム

We can know htat a human visual system does not have good optical elements and restoration will be made in the brain, bue we can obtain a clear image.This reason is that the brain restores degraded images taken on the retina.So we propose the imaging system that has same functions as teh human visual system.and we develop the high quality imaging system based on the human visual system in this research.(1)We propose principles which are similar to functions of the visual system and examine them through computer simulations. We use the method that called GARDS(Generalized Analytic Reconstruction from Discrete Samples) for restoration. In this method the characteristics of the system is described with sensitivity distribution functions instead of point spread functions. Merits of this method are to deal the object space as continuous, to be able to restore space-variant degradation analytically, and especially to be able to describe all factors of the degradation appeared in the system by sensitivity functions.(2)If somebody uses a simple lens to get and image, the obtains image is degraded by blur or distortion. Then one can restore them through post-processing by using knowledge about properties of the optical system. But usually, it is difficult to get characteristics of optical systems. So we propose a method to learn functional parameters with selecting proper patterns(base functions).(3)we have confirmed effectiveness of our method for the space-variant imaging system. we made and experiment on the system combined an optical system (a monitor, a single lens and CCD-camare) with post-processing which is on a workstation. After taking a degraded image, we restored in by the method. And also, A zooming function that combines a liquid crystal lens and restoring process is realized.

我们可以知道，人类视觉系统没有良好的光学元件，在大脑中进行修复，但我们可以获得清晰的图像。这是因为大脑恢复了视网膜上拍摄的退化图像。因此，我们提出了与人类视觉系统具有相同功能的成像系统。在本研究中，我们开发了基于人类视觉系统的高质量成像系统。（1）我们提出了与视觉系统功能相似的原理，并通过以下方法对其进行了检验： 计算机模拟。我们使用GARDS（离散样本广义分析重建）方法进行恢复。在该方法中，系统的特性是用灵敏度分布函数而不是点扩散函数来描述的。该方法的优点是将物空间视为连续的，能够解析地恢复空间变化的退化，特别是能够用灵敏度函数来描述系统中出现的退化的所有因素。（2）如果有人使用简单的镜头来成像，则获得的图像会因模糊或畸变而退化。然后，人们可以利用有关光学系统特性的知识，通过后处理来恢复它们。但通常情况下，获得光学系统的特性是很困难的。因此，我们提出了一种通过选择适当的模式（基函数）来学习功能参数的方法。（3）我们已经证实了我们的方法对于空变成像系统的有效性。我们在该系统上进行了实验，该系统将光学系统（监视器、单镜头和 CCD 摄像机）与工作站上的后处理相结合。拍摄出退化的图像后，我们通过该方法进行了恢复。并且，实现了结合液晶透镜和恢复处理的变焦功能。

项目成果

小尾 高史 他: "システムの分解能を考慮した連続-離散モデルに基づく再構成手法" 光学連合シンポジウム浜松'94講演予稿集. 63-64 (1994)

Takashi Oo 等人：“考虑系统分辨率的基于连续离散模型的重建方法”光学联盟滨松研讨会论文集 94（1994）。

Takashi Obi et.al: "An introduction of resolving power to continuous-discrete inverse problem" Japan Optics '94 Ext.Abs.63-64 (1994)

Takashi Obi 等人：“连续离散逆问题解决能力的介绍”Japan Optics 94 Ext.Abs.63-64 (1994)

Magaaki Ohyama et.al: "Image Reconstruction Based on Continuous-Discrete Mapping Model" Optical Method in Biomedical and Environmental Sciences. 55-58 (1994)

Magaaki Ohyama 等人：“基于连续离散映射模型的图像重建”生物医学和环境科学中的光学方法。

Nagaaki Ohyama et. al.: "Image Reconstruction Based on Continuous-Discrete Mapping Model" Optical Methods in Biomedical and Environmental Sciences. 55-58 (1994)

大山长明等。

日暮 正樹 他: "液晶レンズを用いた機械的可動部のないズ-ム機能" 第25回画像工学コンファレンス論文集. 283-286 (1994)

Masaki Higurashi 等人：“使用液晶镜头无需机械移动部件即可实现变焦功能”第 25 届图像工程会议论文集 283-286 (1994)。