endoscope exploration on knee surface n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Endoscope Exploration on Knee Surface PowerPoint Presentation
Download Presentation
Endoscope Exploration on Knee Surface

Loading in 2 Seconds...

play fullscreen
1 / 15

Endoscope Exploration on Knee Surface - PowerPoint PPT Presentation


  • 117 Views
  • Uploaded on

Endoscope Exploration on Knee Surface. 15-862 Computed Photography Final Project Chenyu Wu. Motivation. Endoscope is widely used in minimally invasive surgery. Problem. The size and distortion of endoscope images limit its use. Our Goal.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Endoscope Exploration on Knee Surface' - mandelina-jorgensen


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
endoscope exploration on knee surface

Endoscope Exploration on Knee Surface

15-862 Computed Photography Final Project

Chenyu Wu

motivation
Motivation
  • Endoscope is widely used in minimally invasive surgery
problem
Problem
  • The size and distortion of endoscope images limit its use.
our goal
Our Goal
  • Stitch the endoscope images onto a 3D surface to get a bigger view of the knee surface
solution
Solution
  • Calibration
    • Image: Correct the distortion
    • Camera: Get intrinsic parameters
  • Map onto surface
    • Put trackers on the endoscope and bone
    • Compute the transformation between camera and bone
    • Texture mapping
image calibration
Image Calibration
  • Basic idea – warp! rectify!
    • Generate a set of checker board and grid images
    • Define the correspondences between original image and endoscope image
    • Compute Homograph for each corresponding images
    • Same endoscope, consider least square to get the best fit homograph
camera calibration
Camera Calibration
  • Determine intrinsic parameters
    • Given a set of control points with known x,y,z and u,v
    • Least Square
transformation between camera and bone
Transformation between camera and bone
  • Determine extrinsic parameters
texture mapping
Texture mapping
  • Compute the transformation from image to bone (surface)
  • Given each image, we can find the corresponding vertex and local triangles on the surface
  • Warp!
references
References
  • C. ARLOS. H. ENRIQUE. Q. UARTUCCI. F. ORSTER. C. LÉSIO. L. T. OZZI, “Toward 3d reconstruction of endoscope images using shape from shading”, Proceedings SIBGRAPI 2000, XIII Brazilian Symposium on Computer Graphics and Image Processing, Gramado, RS, pp. 90-96, October, 2000.
  • C. Soler, M. Cani, A. Angelidis, “Hierarchical pattern mapping”, ACM Trans. On Graphics (TOG), 21(3): 673-680, 2002.