An augmented-reality edge enhancement application for Google Glass.
An augmented-reality edge enhancement application for Google Glass.
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DOI：
10.1097/opx.0000000000000326
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发表时间：
2014-08
期刊：
影响因子：
--
通讯作者：
Peli E
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文献类型：
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作者：
Hwang AD;Peli E
谷歌眼镜提供了一个平台，可以很容易地扩展到包括视觉增强工具。我们已经在眼镜上实现了增强视觉系统，它将增强的边缘信息覆盖在佩戴者的真实的世界视图上，为眼镜佩戴者提供对比度改善的中央视觉。增强的中央视觉可以自然地与扫描集成。Goggle Glass的摄像头透镜失真是通过使用图像扭曲来校正的。由于摄像头和虚拟显示屏水平间隔16毫米，摄像头瞄准和虚拟显示屏投影角度相差10°，因此扭曲的摄像头图像必须经过一系列3D变换，以最大限度地减少视差，然后才能最终投影到眼镜的透视虚拟显示屏上。所有的图像处理都是为了实现接近实时的性能。针对三名视力正常的受试者测量了对比度增强的影响，其中包括使用和不使用漫射膜来模拟视力丧失。对于所有三个主题，显着提高对比敏感度时，实现主题使用的边缘增强与扩散膜。性能提升受到Glass相机性能的限制。作者假设这解释了为什么只有在漫射器过滤条件下（模拟低视力）才观察到性能改善。通过模拟视觉障碍来测量改善。由于透视增强现实边缘增强的益处，自然视觉扫描过程是可能的，并且表明该设备可以以美观和符合人体工程学的吸引力的形式为黄斑变性患者提供更好的视觉功能。
Google Glass provides a platform that can be easily extended to include a vision enhancement tool. We have implemented an augmented vision system on Glass, which overlays enhanced edge information over the wearer’s real world view, to provide contrast-improved central vision to the Glass wearers. The enhanced central vision can be naturally integrated with scanning. Goggle Glass’s camera lens distortions were corrected by using an image warping. Since the camera and virtual display are horizontally separated by 16mm, and the camera aiming and virtual display projection angle are off by 10°, the warped camera image had to go through a series of 3D transformations to minimize parallax errors before the final projection to the Glass’ see-through virtual display. All image processes were implemented to achieve near real-time performance. The impacts of the contrast enhancements were measured for three normal vision subjects, with and without a diffuser film to simulate vision loss. For all three subjects, significantly improved contrast sensitivity was achieved when the subjects used the edge enhancements with a diffuser film. The performance boost is limited by the Glass camera’s performance. The authors assume this accounts for why performance improvements were observed only with the diffuser filter condition (simulating low vision). Improvements were measured with simulated visual impairments. With the benefit of see-through augmented reality edge enhancement, natural visual scanning process is possible, and suggests that the device may provide better visual function in a cosmetically and ergonomically attractive format for patients with macular degeneration.