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Applications of Light fields in Computer vision Week 1. REU student: Amari Lewis P.H.D student: Aidean Sharghi. Applications of light fields in Computer Vision. The goals of this project is to examine : Object recognition Occlusion Detection 3D reconstruction of a scene.

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applications of light fields in computer vision week 1

Applications of Light fields in Computer visionWeek 1

REU student: Amari Lewis

P.H.D student: AideanSharghi

applications of light fields in computer vision
Applications of light fields in Computer Vision
  • The goals of this project is to examine :
    • Object recognition
    • Occlusion Detection
    • 3D reconstruction of a scene
what is object recognition
What is object recognition?
  • Given test image, we want to determine what the image is.
  • Steps for conventional object recognition:
      • Collect dataset
      • Divide into positive/ negative data
      • Extract features (ex: sift..)
      • Train a classifier for extracted features
      • Given a test image: Extract the features
      • Use the classifier to determine which object it is
the problem
The problem
  • Conventional methods use 2d information of the objects for detection.
  • Example: a bottle and a picture of a bottle on a piece of paper.
lytro light field camera
Lytro light field camera
  • Using the lytro camera we are able to include 3d information with one single shot.
  • The camera manages to capture all the light field direction, intensity and color.
stereo
Stereo
  • The conventional way of capturing 3d information is using stereo
  • Finding the correspondents is difficult
  • However finding the correspondents can be avoided…

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epi
  • Epipolar plane images
    • Can be used to represent 3d information of the object
    • This project/research is based on using epi to describe the objects and increase the object recognition accuracy
steps
Steps:
  • Choose 5 categories for classification
  • Collect dataset using the light field camera
  • Extract the photos, using the lytro software
5 categories for dataset using light field camera
5 categories for dataset using light field camera
  • Bicycles
  • Bus
  • Trees/flowers
  • Buildings
  • trucks
assignment
Assignment
  • There has been a similar study to improve object recognition and tracking
  • Scale-invariant representation of light field images for object recognition and tracking
  • Ecolepolytechniquefederale de Lausanne (Switzerland)
references
references
  • Ng, REN (2006). Digital light field photography (doctoral dissertation). Stanford University, Stanford, California.
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