Computational Photography: Epsilon to Coded Imaging

author: Ramesh Raskar, MIT Media Lab, School of Architecture + Planning, Massachusetts Institute of Technology, MIT
published: Dec. 5, 2008,   recorded: November 2008,   views: 1250
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Slides

Slides
0:00 Computational Photography: Epsilon to Coded Imaging
1:09 Integration of Cameras in Mobile Phones
2:09 Where are the ‘camera’s? (1)
3:31 Where are the ‘camera’s? (2)
4:02 We focus on creating tools to better capture and share visual information
4:22 Cameras of Tomorrow
6:23 Motion Blurred Photo (1)
6:52 Motion Blurred Photo (2)
7:17 Flutter Shutter Camera (1)
7:55 Flutter Shutter Camera (2)
8:15 Blurring == Convolution (1)
9:22 Blurring == Convolution (2)
10:13 Blurring == Convolution (3)
11:13 Blurring == Convolution (4)
11:51 Blurring == Convolution (5)
12:26 Coded Aperture Camera
12:44 In Focus Photo
12:52 Out of Focus Photo: Open Aperture
13:21 Out of Focus Photo: Coded Aperture
13:36 Captured Blurred Photo
13:41 Refocused on Person
14:08 Less is More (1)
15:03 Less is More (2)
16:00 Shielding Light …
16:13 Coded Computational Photography
16:35 Computational Photography
17:18 Epsilon Photography
18:12 Computational Photography (1)
18:54 Computational Photography (2)
20:50 Computational Photography (3)
22:05 Computational Photography (4)
22:15 Computational Photography (5)
22:58 Light Field Inside a Camera
24:53 Stanford Plenoptic Camera [Ng et al 2005]
25:32 Digital Refocusing
26:23 Mask based Light Field Camera
27:04 How to Capture 4D Light Field with 2D Sensor ?
27:23 Optical Heterodyning
28:02 Cosine Mask Used
28:28 Captured 2D Photo (1)
28:43 Captured 2D Photo (2)
29:11 Computing 4D Light Field
29:47 Extra sensor bandwidth cannot capture extra dimensionof the light field
29:49 Solution: Modulation Theorem Make spectral copies of 2D light field
29:50 Sensor Slice captures entire Light Field
29:51 Demodulation to recover Light Field (1)
29:51 Demodulation to recover Light Field (2)
29:54 Single shot visual hull: Shield Field
30:54 Single shot 3D reconstruction: Simultaneous Projections using Masks
31:00 Long Distance Bar-codes
32:02 Computational Camera and Photography
32:29 Towards a 6D Display - Passive Reflectance Field Display
32:34 Camera Culture
33:30 Tools for Visual Computing (1)
34:32 Tools for Visual Computing (2)
35:01 Blind Camera
35:33 Cameras of Tomorrow (1)
35:39 Cameras of Tomorrow (2)

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Description

Computational photography combines plentiful computing, digital sensors, modern optics, actuators, and smart lights to escape the limitations of traditional cameras, enables novel imaging applications and simplifies many computer vision tasks. However, a majority of current Computational Photography methods involve taking multiple sequential photos by changing scene parameters and fusing the photos to create a richer representation. The goal of Coded Computational Photography is to modify the optics, illumination or sensors at the time of capture so that the scene properties are encoded in a single (or a few) photographs. We describe several applications of coding exposure, aperture, illumination and sensing and describe emerging techniques to recover scene parameters from coded photographs.

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