Introduction
参考视频：# 04.相机系统 | GAMES204-计算成像
Nautilus Eye 大王乌贼 小孔成像阶段
tapetum incidum 反射层，提高夜视能力
Compound Eye 光场相机
Human Eye
Visual acuity: 20/20 is ~1 arc min
Field of view: ~190° monocular, ~120°binocular,~135° vertical
Temporal resolution: ~60Hz(depends on contrast, luminance)
Dynamic range: instantaneouse 6.5 f-stops,adapt to 46.5f-stops
Color: everything in the CIE xy diagram; distances are linear in CIE Lab
Depth cues in 3D displays: vergence, focus, conflicts,
Accommodation range: ~8cm to ∞，年龄越大看看近能力越差
Camera Optics: Lens
Aberrations
Distortion
Aperture
Unit: f-number N = f/D
f 焦距，D aperture 直径
D 越小，进光量越大，景深越小
Camera Depth of Field
物距、Aperture Size、放大率
M放大率越大，景深越小
hyper plane
光圈小会带来曝光时间长的问题
Field of View
超广角,长焦
Focal length 是固定的，Sensor 是固定的
Diffraction Limit 衍射极限
Dolly zoom
Sensor 传感器
非线性的 曝光程度(Log Exposure)和曝光密度(Density)
HDR imaging 高动态范围
ISO 相对线性
电子快门对于运动快的物体会导致拉伸变形