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Reverse Seam Carving

Reverse Seam Carving . 2011 Sixth International conference on Image and Graphics Gang Pan, Weishu Li, Wei Bai , Jinyan Chen, and Luyuan Li. Speaker: Hon-Hang Chang ( Sica ) Date: 2012. 02. 17. Introduction Related Works Proposed Method Experimental Results Conclusions. Outline .

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Reverse Seam Carving

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  1. Reverse Seam Carving 2011 Sixth International conference on Image and Graphics Gang Pan, Weishu Li, Wei Bai, Jinyan Chen, and Luyuan Li Speaker: Hon-Hang Chang (Sica) Date: 2012. 02. 17

  2. Introduction • Related Works • Proposed Method • Experimental Results • Conclusions Outline

  3. (b) (a) Introduction Target Size (c) Remove Seams (e) Insert Seams (d)

  4. 5 3 5 3 9 4 5 3 5 7 Related Works 7 6 4 5 3 1 6 2 10 9 8 5 8 3 3 2 4 9 12 10 4 5 7 7 4 3 10 11 8 8 Image I Block B3,2 Edge I’ 6 4 3 2 1 4 5 3 4 5 3 7 5 5 4 3 1 6 2 1 6 2 B3,2 B3,2 8 5 8 8 5 8 = 10 × × ＋ 1 2 1 1 0 -1 Gy 0 0 0 2 0 -2 Gx -1 -2 -1 1 0 -1

  5. 7 6 4 5 3 2 8 4 8 9 13 15 13 Related Works (Cont.) 7 6 4 5 3 11 18 19 21 21 2 4 9 12 10 17 15 21 21 22 3 10 11 8 8 22 20 21 25 24 6 4 3 2 1 Energy Map 7 5 6 4 3 7 6 6 4 5 3 2 8 8 4 9 13 15 13 8 Edge I’ 11 11 18 19 21 21 17 15 21 21 22 15 22 20 20 21 25 24 Choose the Minimum Coefficient Energy Map

  6. M. Rubinstein, A. Shamir, and S. Avidan, “Improved seam carving for video retargeting,” ACM Trans. Graph., vol. 27, pp. 16:1–16:9, August 2008. Related Works (Cont.)

  7. Proposed Energy Function Proposed method Straight Term Inverse Term Straight Map Inverse Map

  8. Visual Point Structure Proposed Method (Cont.) Image I C

  9. Visual Point Structure (Cont.) Proposed Method (Cont.) Case 1: Case 2: Case 3:

  10. Visual Point Structure (Cont.) Proposed Method (Cont.)

  11. Seam Carving Proposed Method Original Experimental Results Proposed Method Original Width Reduce Seam Carving Fig. 4 Resizing performance comparison.

  12. Experimental Results(Cont.) Proposed Method Seam Carving Original

  13. Experimental Results(Cont.) Proposed Method Original Seam Carving

  14. This paper present an improved energy function to make the seam insert and remove process more reversible. Conclusions • To large scale cases, the insertion process cannot satisfy the quality as well as the removal process.

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