1. The Art and Science of Digital Compositing

2. Chapter 6Matte Creation and Manipulation 3. Agenda Rotoscoping Procedural Matte Extraction Matte Manipulations 3 4. Rotoscoping 5. Rotoscoping? 6. Rotoscoping 6 7. RotoscopingBored (Garbage Matte Experiment).mp4rotoscoping_thought_of_you_2.avi 7 8. RotoscopingVisual_Effects_100_Years_of_Inspiration_-_YouTube.avi8 9. RotoscopingMatteKey9 10. RotoscopingMatte Keying10 11. Rotoscoping3D software Matte11 12. RotoscopingPaint? Spline? 12 13. Rotoscoping13 14. Rotoscoping 14 15. Rotoscoping () Shape 15 16. RotoscopingTechniquesspline ?spline obejct overlapping ? object mask ? 16 17. RotoscopingTechniquesOverlap Entity 17 18. RotoscopingTechniquesobject (hierarchy) mini-animation body parent 18 19. Rotoscoping Techniques 19 20. Rotoscoping Techniques20 21. Rotoscoping Techniques 21 22. Rotoscoping Techniques22 23. RotoscopingTechniquesConsistency 23 24. Rotoscoping Techniques24 25. Rotoscoping TechniquesAutomatic Interpolation25 26. RotoscopingMotion Blur26 27. RotoscopingMotion Blur27 28. RotoscopingLimitations (transparency) Hair, Fur ( Shape) Spline 28 29. Procedural Matte Extraction 30. Procedural Matte Extraction (Non-Linear Keyer Keying ) Luma-Key Matte Chroma-Key Matte Color Difference Matte Keyer Software Discreet Keyer Ultimatte Corp Ultimatte, Ultimatte Advantage Photron Primatte, FS-C Keylight Digital Film Tools ZMatte,30 31. Procedural Matte Extraction Keying Based on Luminance Luma-Keying Matte ( ) image-processiong operator 31 32. Procedural Matte Extraction Keying Based on Luminance 32 33. Procedural Matte Extraction Keying Based on Luminance 33 34. Procedural Matte Extraction Keying Based on LuminanceContrast Operator 34 35. Procedural Matte Extraction Keying Based on Luminance Lumakey 35 36. Procedural Matte Extraction Keying Based on Chrominance Color Hue , , pixel RGB HSV RGB HSV 36 37. Procedural Matte Extraction Keying Based on Chrominance 37 38. Procedural Matte Extraction Keying Based on Chrominance 38 39. Procedural Matte Extraction Keying Based on Chrominance 39 40. Procedural Matte Extraction Keying Based on Chrominance 40 41. Procedural Matte Extraction Keying Based on ChrominanceMatte = 41 42. Procedural Matte Extraction Keying Based on ChrominanceChromaKey 42 43. Procedural Matte ExtractionThe Color Difference Method Optical() Matte Process 1950 Petro Vlahos 1959 Ben Hur() () Matte , Color correction, step 43 44. Procedural Matte Extraction The Color Difference Method Step 1 : Matte Extraction blue component green component intensity() blue green If Blue > Greenthen NewBlue = Greenelse NewBlue = Blue blue backing green 0 , blue background black 44 45. Procedural Matte Extraction The Color Difference Method Step 2 : Matte GenerationMatte = Blue - Maximum(Green,Red) ( ) R - Max(G, B) G - Max(R, B) matte 45 46. Procedural Matte Extraction The Color Difference Method Step 2 : Matte Generation * Background 46 47. Procedural Matte ExtractionThe Color Difference Method Step 3 : Over OperatorIf Blue > GreenMatte =then NewBlue = GreenOver OperatorBlue -else NewBlue = Blue Maximum(Green,Red)Channel Threshold 47 48. Procedural Matte ExtractionThe Color Difference Method backdrop foreground object Matte , pre-correcting keying , , color differencemethod bluescreen, greenscreen 12 48 49. Procedural Matte Extraction The Color Difference Method Spill ( ) Back Light : ( 85) : : 49 50. Procedural Matte ExtractionDifference MattingRaw Difference Matte = Abs(R1 - R2) + Abs(G1 - G2) + Abs(B1 - B2)50 51. Procedural Matte Extraction The Color Difference Method Difference Matting 51 52. Procedural Matte ExtractionDifference Matting object Subtract , , grain method second-pass , 52 53. Matte Manipulation 54. Matte Manipulation 54 55. Matte Manipulation 55 56. Matte Manipulation 56 57. Matte ManipulationChecking the Solidity of your Matte . 2 Judging Color, Brightness, and Contrast 57 58. Matte Manipulation Checking the Solidity of your MatteBrightness Gamma 58 59. Matte Manipulation Checking the Solidity of your Matte 59 60. Matte ManipulationGabage Matte 60 61. Matte ManipulationGabage Matte hold-out matte : 61 62. Matte ManipulationGabage Matte 62 63. Matte ManipulationGabage Matte 63 64. Matte ManipulationGabage Matte Luma Key64 65. Matte ManipulationGabage MatteLuma Key Garbage Matte 65 66. Matte Manipulation Gabage Matte Garbage Matte + Luma Key66 67. Matte ManipulationGabage Matte Lumakey Garbage Matte + Luma Key 67 68. Matte Manipulation Gabage Matte high-quality edge .68 69. Matte Manipulation Edge Matte 69 70. Matte ManipulationEdge Matte 70 71. Matte Manipulation Combining Mattes 71 72. Matte ManipulationImage Processing on Mattes 72 73. Matte ManipulationImage Processing on Mattes 4 Channel Premultiplied Image Premultiplied Unpremultiplied Premultiply 73 74. Matte ManipulationNoise Artifacts : , , 74 75. Matte ManipulationHard Edges 75 76. Matte ManipulationPoor Fitting Mattes Dilate / Erode Brightness / Gamma Dilate Tool 76 77. Q&A 78.