Study on adaptation and focusing in the visual system and its hardware implementation.

视觉系统的自适应和聚焦研究及其硬件实现。

• 批准号: 16500120
• 负责人: TSUKADA Akira
• 金额: $ 2.24万
• 依托单位: Toyama National College of Maritime Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-16500120/
• 关键词: retinal cone; adaptation; focusing; Mach bands; ハードウェア; 合焦機能; 高ダイナミックレンジシーン

(1) Focal edge detection using mechanism of appearance and disappearance of Mach bandsPreviously, it is considered that Mach bands perform to enhance a blur edge. Tsukada et al. suggested by model simulation that the disappearance of Mach bands plays an important role rather than the appearance of them and contributes to a focal edge detection in a visual system. To verify this suggestion, we simulated the edge detection in a real-world image. As a result, Mach bands disappeared in a limited range from 48cm to 52cm under the condition that the distance ring of the camera was set to 50cm. Furthermore, we developed a two dimensional hardware model of above software model and simulated the appearance and disappearance of Mach bands.(2) Hardware model on adaptation of retinal coneAlthough the dynamic range of retinal cones to the light is three log units at most, the cones can visually respond to the light over a luminance span of about seven log units. The cones accomplish this by shifting the adapting level relative to the ambient light levels spatio-temporally. We proposed a mathematical model on a cone adaptation. But we did not consider the spatial characteristics. In this research, we developed a hardware model and attempted to simulate the spatial and temporal characteristics of the cones by considering circumference adaptation.

(1)利用马赫带的出现和消失机制进行聚焦边缘检测以前，人们认为马赫带可以增强模糊边缘。Tsukada等人通过模型模拟提出，马赫带的消失起着重要作用，而不是它们的出现，并且有助于视觉系统中的焦点边缘检测。为了验证这一建议，我们模拟在现实世界的图像边缘检测。结果表明，当相机的距离环设置为50 cm时，马赫带在48 ~ 52 cm的有限范围内消失。在此基础上，建立了该软件模型的二维硬件模型，并对马赫带的出现和消失进行了模拟。(2)视网膜视锥适应的硬件模型虽然视网膜视锥对光的动态范围最多为3个对数单位，但视锥对光的视觉响应范围约为7个对数单位。锥体通过相对于环境光水平在空间上-时间上移位适应水平来实现这一点。我们提出了一个关于锥适应的数学模型。但我们没有考虑空间特征。在本研究中，我们开发了一个硬件模型，并试图模拟视锥细胞的空间和时间特性，考虑周长适应。

项目成果

ハンズフリーポインテイングシステム

免提指点系统

• 发表时间: 2006

錯視を説明する視覚情報処理モデルの合焦検出機能について

解释视错觉的视觉信息处理模型的焦点检测函数

• 发表时间: 2006
• 期刊: 平成17年度北陸地区学生による研究発表会講演論文集
• 作者: Q.Chen;H.Wu;T.Wada;寺島義晴
• 通讯作者: 寺島義晴

網膜錐体順応機構のハードウェアモデル

视网膜锥体适应机制的硬件模型

• 发表时间: 2006
• 期刊: 電子情報通信学会技術研究報告 MBE2006-2
• 作者: Q.Chen;H.Wu;T.Wada;Katsuhiro Hirayama;T.Naka;杉本拓巳
• 通讯作者: 杉本拓巳

Focal edge detection using mechanizm of appearance and disappearance of Mach bands.

使用马赫带的出现和消失机制进行焦点边缘检测。

• 发表时间: 2007
• 期刊: IEICE Technical Report MBE2007-2
• 作者: TERASHIMA;Yoshiharu
• 通讯作者: Yoshiharu

Consideration of hardware implementation of retinal cone.

考虑视网膜锥体的硬件实现。

• 发表时间: 2004
• 期刊: Proc. of the Conference of Hokuriku Capter of Japanese Society for Medical and Biological Engineering
• 作者: YOSHIDA;Yako
• 通讯作者: Yako