The Art and Science of Digital CompositingComputer-generated visual effects are now used extensively in feature films, commercials, music videos, and multimedia. The backbone of this process, the final and most important step, is known as digital compositing. The Art and Science of Digital Compositing is a comprehensive reference that provides a complete overview of the technical and the artistic nature of this process. This book covers a wide range of topics from basic image creation, representation, and manipulation, to a look at the visual cues that are necessary to create a believable composite. Designed as both an introduction to the field as well as a valuable technical reference, this book should be of interest to both novices and professionals alike. Written by a working professional in the visual effects industry, the book provides over 250 different images and illustrations (including a 40-page color insert) as well as a complete glossary of compositing and visual-effects terminology. Also included are in-depth case studies from well-known films such as Speed, Independence Day, and Titanic. |
Contents
The Art and Science of Digital Compositing | xix |
HISTORICAL PERSPECTIVE | 2 |
TERMINOLOGY | 5 |
ORGANIZATION OF THE BOOK | 6 |
The Digital Representation of Visual Information | 12 |
Pixels Components and Channels | 13 |
Spatial Resolution | 15 |
Bit Depth | 16 |
Specialized Film Formats | 154 |
VIDEO FORMATS | 156 |
Fields | 157 |
Color Resolution | 159 |
Gamma | 160 |
PAL | 161 |
OTHER FORMATS | 162 |
WORKING WITH NONSQUARE PIXELS | 163 |
Normalized Values | 18 |
The HSV Color Representation | 19 |
IMAGE INPUT DEVICES | 20 |
DIGITAL IMAGE FILE FORMATS | 21 |
Vendor Implementations of File Formats | 22 |
Choosing a File Format | 29 |
Nonlinear Color Spaces | 30 |
Basic Image Manipulation | 31 |
TERMINOLOGY | 32 |
COLOR MANIPULATIONS | 34 |
Gamma Correction | 36 |
Invert | 37 |
Contrast | 38 |
Channel Swapping | 39 |
HSV Manipulations | 40 |
Lookup Table Manipulations | 41 |
Expression Language | 42 |
SPATIAL FILTERS | 44 |
Blurring | 45 |
Sharpen | 48 |
Median Filter | 49 |
GEOMETRIC TRANSFORMATIONS | 50 |
Panning | 51 |
Rotation | 53 |
Scale | 54 |
Warping | 56 |
Filtering Algorithms | 58 |
Basic Image Compositing | 63 |
THE INTEGRATED MATTE CHANNEL | 65 |
MULTISOURCE OPERATORS | 66 |
Over | 67 |
Mix | 69 |
In | 70 |
Atop | 71 |
MASKS | 72 |
ColorCorrecting and Combining Premultiplied Images | 73 |
Luminosity | 75 |
Matte Creation and Manipulation | 77 |
Keying Based on Luminance | 79 |
Difference Matting | 80 |
The Color Difference Method | 82 |
Specialized Keying Software | 83 |
MATTING TECHNIQUES | 84 |
Edge Mattes | 86 |
Combining Mattes | 87 |
Time and Temporal Manipulations | 91 |
TEMPORAL RESOLUTION | 92 |
TEMPORAL ARTIFACTS | 93 |
CHANGING THE LENGTH OR TIMING OF A SEQUENCE | 94 |
KEYFRAMING | 97 |
Image Tracking and Stabilization | 101 |
TRACKING AN ELEMENT INTO A PLATE | 102 |
Choosing the Feature to Track | 105 |
Limiting the Search Area | 107 |
Using Tracking Curves Manually | 108 |
STABILIZING A PLATE | 109 |
TRACKING MULTIPLE POINTS | 111 |
Interface Interactions | 113 |
WORKFLOW | 114 |
ONLINE VERSUS BATCH | 116 |
METHODS OF REPRESENTING THE COMPOSITING PROCESS | 119 |
Compressed Trees | 121 |
Timelines | 122 |
CURVE EDITORS | 124 |
WORKING WITH PROXY IMAGES | 128 |
Image Viewing and Analysis Tools | 131 |
IMAGE STATISTICS | 133 |
Histograms | 134 |
Formats Media Resolution and Aspect Ratios | 139 |
ASPECT RATIO | 141 |
Nonsquare Pixels | 142 |
DECIDING ON A RESOLUTION WHEN YOU HAVE AN ASPECT RATIO | 144 |
FORMAT CONVERSION PIPELINE | 145 |
A Format Conversion Example | 147 |
FILM FORMATS | 150 |
35mm Formats | 151 |
16mm Formats | 153 |
COMBINING FORMATS | 168 |
Quality and Efficiency | 171 |
EFFICIENCY | 172 |
MINIMIZING DATA LOSS | 173 |
Internal Software Accuracy | 176 |
CONSOLIDATING OPERATIONS | 178 |
REGION OF INTEREST | 182 |
WORKING IN A NETWORKED ENVIRONMENT | 183 |
PRECOMPOSITING | 184 |
Learning to See | 187 |
JUDGING COLOR BRIGHTNESS AND CONTRAST | 188 |
THE CAMERA | 190 |
DISTANCE AND PERSPECTIVE | 191 |
Depth Cues | 193 |
Combining Depth Cues | 197 |
LENS FLARES | 198 |
FOCUS | 199 |
Creating Elements | 201 |
LIGHTING | 202 |
Interactive Lighting | 203 |
MATCHED CAMERAS | 205 |
THE REFERENCE STANDIN | 207 |
CLEAN PLATES | 209 |
FILTERS | 211 |
CHOOSING A FORMAT | 212 |
LIGHTING AND SHOOTING WITH BLUESCREENS | 214 |
Bluescreen versus Greenscreen | 217 |
SHOOTING ORDER | 219 |
Integration Techniques | 221 |
LIGHTING | 223 |
SHADOWS | 224 |
LENS FLARES | 226 |
ATMOSPHERE | 227 |
CAMERA MISMATCHES | 228 |
CAMERA MOVEMENTS | 230 |
FOCUS | 231 |
FILM GRAIN | 232 |
BLUESCREEN INTEGRATION | 234 |
DIGITAL INTEGRATION | 236 |
Advanced Topics | 239 |
White Point and Black Point | 241 |
NONLINEAR COLOR SPACES | 243 |
Working with Nonlinear Color Spaces | 248 |
WORKING WITH 3D ELEMENTS | 251 |
ZDepth Compositing | 253 |
RELATED 2D DISCIPLINES | 259 |
Digital Painting | 262 |
Editing | 264 |
Case Studies | 267 |
SPEED | 269 |
INSURRECTION | 271 |
CON AIR | 272 |
BUDWEISER LIZARDS COMMERCIAL | 274 |
INDEPENDENCE DAY | 276 |
FIGHT THE FUTURE | 278 |
BACK TO THE CRETACEOUS | 279 |
THE PRINCE OF EGYPT | 283 |
TITANIC | 286 |
Digital Compositing Software Tools and Features | 289 |
COLOR CORRECTION | 290 |
SPATIAL FILTERING | 291 |
GEOMETRIC TRANSFORMATION | 292 |
MISCELLANEOUS | 293 |
CONTROL | 294 |
FIELD CONTROLS | 295 |
IMAGE GENERATION | 296 |
OTHER | 297 |
Digital Compositing Software Manufacturers | 299 |
Digital Image File Formats | 301 |
THE CINEON FILE FORMAT | 304 |
Common Film and Video Formats | 311 |
VIDEO | 315 |
HDTV | 317 |
Bibliography | 319 |
Glossary | 323 |
Index | 353 |