Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

UIUC CS 498 - Computational Photography - Final project presentation

1,497 views

Published on

Published in: Art & Photos
  • Be the first to comment

  • Be the first to like this

UIUC CS 498 - Computational Photography - Final project presentation

  1. 1. Computational Photography -Final Project- Miniature Photography Jia-Bin Huang [email_address]
  2. 4. Outline <ul><li>Introduction of fake blur </li></ul><ul><li>Process Overview </li></ul><ul><li>Depth-of-Field (DOF) Specification </li></ul><ul><li>Results </li></ul><ul><li>Discussion </li></ul>
  3. 5. Introduction of Fake Miniature <ul><li>Optical blur </li></ul>Slide credit: Rebert Held
  4. 6. Normal Lens Slide credit: Rebert Held
  5. 7. Tilt-Shift Lens Slide credit: Rebert Held
  6. 8. Process Overview <ul><li>Goal: Simulate the Tilt-Shift Effect (i.e., miniature photography) </li></ul><ul><li>Process </li></ul><ul><ul><li>Focus line/region/target selection </li></ul></ul><ul><ul><li>DOF specification </li></ul></ul><ul><ul><li>Blur image </li></ul></ul><ul><ul><li>Color Enhancement (optional) </li></ul></ul>
  7. 9. Depth-of-Field (DOF) Specification <ul><li>We lost depth information from the image. </li></ul><ul><li>Assumption: objects on the same straight line are at the same depth. </li></ul><ul><li>Methods to specify DOF </li></ul><ul><ul><li>Horizontal </li></ul></ul><ul><ul><li>Focus line </li></ul></ul><ul><ul><li>Object mask </li></ul></ul><ul><ul><li>Salient region detection </li></ul></ul>
  8. 10. DOF - Horizontal
  9. 11. DOF - Focus Line
  10. 12. DOF – Object Mask
  11. 13. DOF – Salient Region Detection
  12. 14. More Results
  13. 23. Discussion <ul><li>Two main open issues </li></ul><ul><ul><li>Depth estimation from single image </li></ul></ul><ul><ul><li>Salient region selection </li></ul></ul><ul><li>Accurate depth information can help create realistic miniature effect </li></ul><ul><li>Salient region selection can help automate the miniature photography process </li></ul>
  14. 24. References <ul><li>[1] Held et al. &quot; Using Blur to Affect Perceived Distance and Size &quot;.  ACM Transactions on Graphics 2010. </li></ul><ul><li>[2] Levin et al. &quot; Image and Depth from a Conventional Camera with a Coded Aperture &quot;. SIGGRAPH 2007. </li></ul><ul><li>[3] Felzenszwalb and Huttenlocher. &quot; Efficient Graph-Based Image Segmentation &quot;. IJCV 2004. </li></ul><ul><li>[4] Achant et al. &quot; Frequency-tuned Salient Region Detection &quot;. CVPR 2009. </li></ul>
  15. 25. Thank You! Questions?

×