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Region Filling and Object Removal by Exemplar-Based Image Inpainting

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Region Filling and Object Removal by Exemplar-Based Image Inpainting. Source: IEEE Transactions on image processing , Vol. 13, No. 9, SEP. 2004. Authors: A. Criminisi , P. Perez and K. Toyama Speaker: Hon- Hang Chang Date: 2011. 07. 22. Outline. Introduction

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Region Filling and Object Removal by Exemplar-Based Image Inpainting
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  1. Region Filling and Object Removal by Exemplar-Based Image Inpainting Source: IEEE Transactions on image processing, Vol. 13, No. 9, SEP. 2004. Authors: A. Criminisi, P. Perez and K. Toyama Speaker: Hon- Hang Chang Date: 2011. 07. 22

  2. Outline Introduction Proposed method Experimental results Conclusions

  3. Introduction • Idea: • Remove (large) object(s) from digital photographs. • Fill the hole with information extracted from the surrounding area. • Filled region should look “reasonable” to the human eyes.

  4. Proposed method • Proposed region-filling algorithm

  5. Proposed method (cont.) • Proposed region-filling algorithm

  6. Proposed method (cont.) • Proposed region-filling algorithm • 1. Computing patch priorities • 2. Propagating texture and structure information • 3. Updating confidence values Fig. 1 A diagram showing an image and a selected target region (in white).

  7. Proposed method (cont.) • Step 1: Computing patch priorities [Note]Initialization:

  8. Proposed method (cont.) • Step 1: Computing patch priorities (cont.) Confidence value Edge

  9. Proposed method (cont.) • Step 2: Propagating texture and structure information

  10. Proposed method (cont.) • Step 3: Updating confidence values

  11. Proposed method (cont.) • Algorithm Table 1 Region filling algorithm

  12. Experimental results (cont.) • Comparing different filling orders d a c b Fig. 1 (a) Original image. (b) The target region has been selected and marked with a red boundary. (c) Results of filling by concentric layers. (d) Results of filling with proposed algorithm. Thanks to the data term in the sign pole is reconstructed correctly by proposedalgorithm.

  13. Experimental results Fig. 2. Removing large objects from photographs. (e) Proposed automatic algorithm(f) filling by traditional image inpainting

  14. Experimental results Fig. 3. Comparison with “texture and structure inpainting” [1]. [1] M. Bertalmio, L. Vese, G. Sapiro, and S. Osher. Simultaneous struc- ture and texture image inpainting. In Proc. Conf. Comp. Vision Pattern Rec., Madison, WI, 2003. http://mountains.ece.umn.edu ∼guille/inpainting.htm.

  15. Experimental results (cont.) • Results by proposed method Fig. 4 Removing an object on a highly textured background. (a) Original photograph. (b) Work correctly on proposed algorithm.

  16. Experimental results (cont.) • Results by proposed method Fig. 5. Removing several objects from a photograph. (a) Original image,(b) The crowd of people and other objects are gradually removed by proposed algorithm.

  17. Experimental results (cont.) • Results by proposed method Fig. 6. Region- filling on an image of a text.

  18. Experimental results (cont.) • Results by proposed method Fig. 7. Final examples of object removal from photographs.

  19. Experimental results (cont.) • Results by proposed method Fig. 8. Removing multiple objects from photographs.

  20. Conclusion • This paper has presented a novel algorithm for removing large objects from digital photographs.