Computational Photography (CS 445) – Fall 2015

Instructor: Derek Hoiem (dhoiem at illinois ; SC 3312)

TAs: Daeyun Shin (dshin11@illinois)

Mariya Vasileva (mvasile2@illinois)

Office Hours:

Derek Mon 10am SC 3312

Daeyun Tues 4pm SC 0207

Mariya Fri 3pm SC 0207

Bonus * Mon 7pm TBD

* Bonus hours on day project is due only

Class Time and Place: Tues and Thurs 9:30-10:45 at DCL 1310

Syllabus

Take-home questions

Lecture Recordings

Homework Submission

Piazza Discussion Board

Textbook: Computer Vision: Algorithms and Applications by Rick Szeliski

Matlab Info: Video Tutorials; Writing Fast Code

Projects

Project 1: Hybrid Images Results	Project 2: Image Quilting Results	Project 3: Gradient Domain Fusion Results
Project 4: Image-based Lighting Results	Project 5: Video Stitching Results	Final Project Results

Class Schedule (subject to change)

Date	Topic	Link	Reading/Notes
Aug 25 (Tues)	Introduction	ppt ; pdf
	Basics of Working with Images
Aug 27 (Thurs)	Pixels and image filters	ppt ; pdf	S3.2 (linear filtering) S3.3 (non-linear filtering)
Sept 1 (Tues)	Thinking in frequency	ppt ; pdf	S3.4 (fourier transforms) S2.3.3 (compression) FFT Demo
Sept 2 (Wed) 5pm, SC0216	Matlab Tutorial, Linear Algebra Tutorial	refsheet examples	Linear algebra review
Sept 3 (Thurs)	Templates and image pyramids	ppt ; pdf	S3.5.2 (image pyramids) S8.1.1 (pyramid alignment) Other reading: Burt Adelson 1983 – The Laplacian Pyramid
Sept 8 (Tues)	Light and color	ppt ; pdf	S2.2 (light), S2.3.2 (color) or Forsyth and Ponce Ch 3
Sept 10 (Thurs)	Histograms and color adjustment	ppt ; pdf	S3.1 (histograms and color adjustment) Color balance demo
Sept 14 (Mon)	Project 1 (Hybrid images) due
	The Digital Canvas: Coloring, Blending, Cutting, Synthesizing, and Warping Images
Sept 15 (Tues)	Growing: Texture synthesis and hole filling	ppt ; pdf	Texture Synthesis – Efros Leung (1999) Image Quilting – Efros Freeman (2001) Image Analogies – Hertzmann et al. (2001) Patch Match – Barnes et al. (2009)
Sept 17 (Thurs)	Cutting: Intelligent Scissors and Graph Cuts	ppt ; pdf	Intelligent Scissors – Mortenson Barret (1995) GrabCut – Rother et al. (2004)
Sept 22 (Tues)	Pasting: Compositing and blending	ppt ; pdf	GradientShop Poisson Image Editing – Perez et al. (2003) Burt and Adelson, A multiresolution spline with application to image mosaics, ACM ToG (1983)
Sept 24 (Thurs)	Image warping (translation, rotation, scale, etc.)	ppt ; pdf	S3.6 (warping) Alignment demo
Sept 28 (Mon)	Project 2 (Image quilting) due
Sept 29 (Tues)	Image morphing	ppt ; pdf
	Modeling the Physical World
Oct 1 (Thurs)	The Pinhole Camera	ppt ; pdf	S2.1.5 (3D to 2D projection)
Oct 6 (Tues)	Single-view Metrology	ppt ; pdf	HoiemSavarese-SVG Chapter
Oct 8 (Thurs)	Single-view 3D Reconstruction	ppt ; pdf	Tour into the picture (Horry et al. 1997)
Oct 12 (Mon)	Project 3 (Gradient domain fusion) due
Oct 13 (Tues)	Image-based Lighting: ray tracing, environment maps, light probes	ppt ; pdf	Reading (do read this): Debevec, Image-based Lighting Tutorial (2005)
Oct 15 (Thurs)	Image-based Lighting cont.: HDR light probes, relighting	ppt ; pdf	Optional Reading: Debevec & Malik, “Recovering High Dynamic Range Radiance Maps from Photographs”, SIGGRAPH 1997 Debevec, Rendering Synthetic Objects in Real Scenes, 1998
Oct 20 (Tues)	The image as a virtual stage	ppt ; pdf	Rendering Synthetic Objects (Karsch et al. 2011)
	Correspondence and Recognition
Oct 22 (Thurs)	Matching and alignment with interest points	ppt ; pdf	Grauman/Leibe Draft Chapter on Local Features Optional: Lowe - SIFT paper
Oct 26 (Mon)	Project 4 (Image-based lighting) due
Oct 27 (Tues)	Automatic Photo Stitching and RANSAC	ppt ; pdf	Brown Lowe 2007 ; S9 (stitching); slides ; Szeliski Tutorial Draft
Oct 29 (Thurs)	Object recognition, retrieval, and augmented reality	ppt ; pdf	Grauman/Leibe Draft Visual Vocabularies; S14.3
Nov 3 (Tues)	Opportunities of scale: texture synthesis, multi-view reconstruction, im2gps, tiny images, etc.	ppt ; pdf	Reading: Hays & Efros, Scene Completion Using Millions of Photographs
	More Topics of Interest
Nov 5 (Thurs)	How the Kinect works	ppt ; pdf
Nov 10 (Tues)	Detecting fakes	ppt ; pdf
Nov 11 (Wed)	Project 5 (Video stitching) due
Nov 12 (Thurs)	Computational approaches to cameras	ppt ; pdf	Adelson & Bergen, The Plenoptic Function and the Elements of Early Vision (1991) Ng et al., Light Field Photography with a Hand-held Plenoptic Camera (2005) Levin et al., Image and Depth with a Coded Aperture (2007)
Nov 16 (Mon)	Final Project Proposal due
Nov 17 (Tues)	Exam Review	ppt ; pdf	Example questions
Nov 19 (Thurs)	Exam, normal class time/place
Nov 24, 26	NO CLASS - Thanksgiving Break!
Dec 1 (Tues)	Understanding Faces	ppt ; pdf
Dec 3 (Thurs)	Video Magnification	ppt ; pdf
Dec 8 (Tues)	Last day – wrap up	ppt ; pdf
Dec 14 (Mon)	Final Project Poster Presentations (1:30-4:30), 1^st floor Siebel Center

Credits and Course Notes

I am grateful for the many preceding efforts to design excellent courses and course notes for this topic. I am particularly indebted to Alyosha Efros for borrowing much of his course and project design, to Rick Szeliski for making his book available, to James Hays for course suggestions and materials, and to Steve Seitz, Lana Lazebnik, Silvio Savarese, among others for their slides (as credited within). Anyone who would like to use my slides is more than welcome; please do credit the original sources where appropriate.