[Computer Vision 3] The Plenoptic Function and the Elements of Early Vision

最新推荐文章于 2024-09-24 08:28:49 发布

原创

最新推荐文章于 2024-09-24 08:28:49 发布 · 842 阅读

1 ·

CC 4.0 BY-SA版权

plenoptic函数描述了观察者在空间和时间中任何位置可获取的信息，包括光线角度、空间坐标、波长、时间和不同视角下光强。早期视觉通过提取plenoptic结构，如形状、颜色和视点变化等信息，进行局部变化测量和低阶导数计算。

The Plenoptic Function

The image information available from a single viewing position, is defined by the pencil of light rays passing through the pupil.

The plenoptic function describes the information available to an observer at any point in space and time. (connection between objects and eyes)

P(θ, φ, λ, t, Vx, Vy, Vz), or P(x, y, λ, t, Vx, Vy, Vz): P(θ, φ): spherical coordinate, P(x, y): spatal coordinate, P(λ): wavelength (color information), P(t): movie, time dimension, P(Vx, Vy, Vz): observable light intensity at every viewing position.

The Plenoptic Structure

(x, y): information about instantaneous form;

(x, λ): information about color variation along x-axis;

(x, Vx/Vy/Vz): information as eye position shift from left to right (up and d