Limits to visual processing: non-linearities, noise and integration

视觉处理的限制：非线性、噪声和积分

• 批准号: RGPIN-2016-03740
• 负责人: Hess, Robert
• 金额: $ 4.44万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=631571
• 关键词: Limits; visual; processing; non; linearities

In any sensory system there are three fundamental stages in processing; the initial filtering, non-linear transduction and integration. Neural signals are perturbed by internal noise that limits detectability. Previous approaches have often assumed the visual system is linear and the neural noise is additive. However, it is now recognized that the human visual system has nonlinearities that also affect these measurements. Furthermore, differences in this nonlinearity can be confused with differences in internal noise level if these effects are not accounted for. These effects require a new comprehensive approach that will distinguish nonlinearities from internal noise. In this proposal I develop novel methods that will have long term applicability for understanding the functional limits of visual processing in the cortex. This will be applied in the short term to contrast processing, and to the processing of form and motion in the intermediate term.

在任何感觉系统中，处理过程都有三个基本阶段；初始滤波，非线性转导和积分。神经信号受到内部噪声的干扰，限制了可探测性。以前的方法通常假设视觉系统是线性的，神经噪声是加性的。然而，现在人们认识到人类视觉系统的非线性也会影响这些测量。此外，如果不考虑这些影响，这种非线性的差异可能与内部噪声水平的差异混淆。这些影响需要一种新的综合方法来区分非线性和内部噪声。在这个建议中，我开发了新的方法，将长期适用于理解皮层视觉处理的功能限制。这将在短期内应用于对比处理，并在中期应用于形式和运动的处理。