Northeastern University, Fall 2005 Northeastern University, Fall 2005 CSG242: Computational CSG242: Computational Photography Photography Ramesh Raskar Mitsubishi Electric Research Labs Northeastern University Oct 19th, 2005 Course WebPage : http://www.merl.com/people/raskar/photo/course/
61
Embed
Northeastern University, Fall 2005 CSG242: Computational Photography Ramesh Raskar Mitsubishi Electric Research Labs Northeastern University Oct 19th,
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Northeastern University, Fall 2005Northeastern University, Fall 2005 CSG242: Computational PhotographyCSG242: Computational Photography
Ramesh RaskarMitsubishi Electric Research Labs
Northeastern UniversityOct 19th, 2005
Course WebPage :
http://www.merl.com/people/raskar/photo/course/
Plan for TodayPlan for Today
• ““The Eye As a Camera” Michael SandbergThe Eye As a Camera” Michael Sandberg
• Second Programming AssignmentSecond Programming Assignment
• Mid TermMid Term– Oct 26Oct 26thth
• Project Proposals DueProject Proposals Due– November 2November 2ndnd
• Paper reading Paper reading • 2 per student, 15 mins each, Reading list on the web2 per student, 15 mins each, Reading list on the web• Starts Nov 2Starts Nov 2ndnd
CreditsCredits• Assignments:Assignments:• Five project-oriented assignmentsFive project-oriented assignments• Requires programming in MatlabRequires programming in Matlab• 8 points each (Last assignment format is flexible)8 points each (Last assignment format is flexible)
• Mid-term ExamMid-term Exam• 20 points20 points•• Paper reading (two papers per student, 15 min presentation, 5pts each)Paper reading (two papers per student, 15 min presentation, 5pts each)• 10 points (Was Term Paper, 15 points)10 points (Was Term Paper, 15 points)
• Final ProjectFinal Project• Individual or in a group of 2Individual or in a group of 2• 20 points20 points
• Nov 2Nov 2ndnd Project Proposals Due Project Proposals Due
• Nov 9Nov 9thth Class ? Likely on 10 Class ? Likely on 10thth
• Nov 16Nov 16thth Class ? Class ?
• Nov 23Nov 23rdrd -> Likely on Nov 22 -> Likely on Nov 22ndnd
• Nov 30Nov 30thth
• Dec 7Dec 7thth
• Dec 15Dec 15thth (Exam week) Projects (Exam week) Projects
Mid-TermMid-Term
• Oct 26Oct 26thth at 6pm, at 6pm, • Duration: 90 minutesDuration: 90 minutes• Questions: Think, Explore, SolveQuestions: Think, Explore, Solve
– No need to remember all the formulas in detailNo need to remember all the formulas in detail– More concepts than math problemsMore concepts than math problems– Drawing diagrams to explain conceptsDrawing diagrams to explain concepts
• 20 points20 points• TopicsTopics
• All material covered till Oct 19All material covered till Oct 19thth
• Slides, assignments and in-class discussionsSlides, assignments and in-class discussions• Basics, Dynamic Range, Focus, IlluminationBasics, Dynamic Range, Focus, Illumination
FocusFocus
Computational Illumination
Synthetic LightingSynthetic LightingPaul Haeberli, Jan 1992Paul Haeberli, Jan 1992
Varying Exposure time Varying Flash brightness Varying both
Capturing HDR Image
Do We Need All Images ?Do We Need All Images ?
Regular 2D Sampling24 Pictures
Adaptive Sampling5 pictures
Next Best Picture ? Next Best Picture ?
Exposure Time
Flash
Bri
ghtn
ess
Exposure Time
Flash
Bri
ghtn
ess
• Based on all previous picturesBased on all previous pictures• Maximize well-lit pixels over the imageMaximize well-lit pixels over the image• Exclude pixels already captured as well-exposedExclude pixels already captured as well-exposed
HDR Image using N images
HDR Image using N+1 images
Underexposed Still UnderexposedWell-exposedExposure Time
Flash
Bri
ghtn
ess
?
?
?
N+1th picture ?
Mitsubishi Electric Research Labs Raskar, Tan, Feris, Yu, TurkMultiFlash NPR Camera
Ramesh Raskar, Karhan Tan, Rogerio Feris, Jingyi Yu, Matthew Turk
Mitsubishi Electric Research Labs (MERL), Cambridge, MAU of California at Santa Barbara