Amazon VERSION 2.0V1 Guide de l'utilisateur Page 194
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
194
Control (UI) Default Value Function
operation (continued) The available operations (based on the Porter & Duff paper) are:
• ImageAtop - Fb+B(1-f). This shows the shape of the
background, with the foreground covering the background
where the images overlap.
• ImageAverage - (F+B)/2. This produces the average of the
two images. The result is darker than the original images, but
accentuates highlights.
• ImageDifference - abs(F-B). This shows how much the pixels
differ and is useful for comparing two very similar images.
• ImageDivide - B/F. This divides the background values by the
foreground values.
• ImageExclusion - F+B-2FB. This is a more photographic form
of ImageDifference.
• ImageFrom - F-B. This subtracts the background from the
foreground. For subtracting the foreground from the
background instead, see ImageMinus.
• ImageGeometric - 2FB/(F+B). This is another way of
averaging two images. Visually, it's close to ImageMin.
• ImageHypot - sqrt(F*F+B*B). This resembles the ImageAdd
and ImageScreen operations. The result is not as bright as
ImageAdd, but brighter than ImageScreen. ImageHypot
works with values above 1. It can be is useful for adding
reflections, as an alternative to ImageScreen.
• ImageIn - Bf. This only shows the areas of the background
that overlap with the alpha of the foreground. It can be useful
for combining mattes.
• ImageMatte - Ff*B(1-f). This is a premultiplied ImageOver.
Use unpremultiplied images with this operation.
• ImageMax - max(F,B). This takes the maximum values of both
images. This is a good way to combine mattes and useful for
bringing aspects like bright hair detail through.
4 NODES I-K | IMAGEHYPOT
- REFERENCE GUIDE 1
- Contents 3
- 1 Preface 10
- Contacting Customer Support 11
- 2 Nodes A-C 12
- Alembic_In 13
- ArnoldGlobalSettings 16
- ArnoldObjectSettings 27
- ArnoldOutputChannelDefine 31
- ArnoldShadingNode 38
- AttributeCopy 72
- AttributeEditor 74
- AttributeFile_In 77
- AttributeModifierDefine 79
- AttributeModifierResolve 81
- AttributeScript 81
- AttributeSet 87
- AttributeUpgrade 90
- BillboardConstraint 92
- BoundsAdjust 93
- CameraClippingPlaneEdit 94
- CameraCreate 95
- CameraImagePlaneCreate 98
- CameraScreenWindowConstraint 101
- ClippingConstraint 102
- CollectionCreate 103
- ConstraintListEdit 103
- ConstraintResolve 104
- CoordinateSystemDefine 104
- 3 Nodes D-H 106
- FaceSetCreate 108
- FOVConstraint 109
- GafferThree 113
- GenericOp 123
- GroupMerge 131
- GroupStack 133
- HierarchyCopy 134
- 4 Nodes I-K 135
- ImageAtop 136
- ImageAverage 140
- ImageBackgroundColor 144
- ImageBlack 145
- ImageBlur 146
- ImageBrightness 149
- ImageChannels 150
- ImageCheckerboard 153
- ImageClamp 154
- ImageColor 156
- ImageContrast 158
- ImageCoordinate 160
- ImageCrop 161
- ImageDifference 162
- ImageDistort 166
- ImageDivide 169
- ImageExclusion 173
- ImageExposure 177
- ImageFade 179
- ImageFrom 180
- ImageGain 184
- ImageGamma 186
- ImageGeometric 188
- ImageHypot 192
- ImageInvert 200
- ImageLevels 201
- ImageMatte 203
- ImageMatteMix 207
- ImageMax 209
- ImageMin 213
- ImageMinus 217
- ImageMix 221
- ImageMultiply 222
- ImageOrient 226
- ImageOut 227
- ImageOver 231
- ImagePlus 235
- ImagePosition 239
- ImagePremultiply 240
- ImageRamp 242
- ImageRead 243
- ImageReformat 247
- ImageSaturation 250
- ImageScreen 252
- ImageText 256
- ImageThreshold 260
- ImageTransform2D 263
- ImageUnder 268
- ImageUnpremultiply 272
- ImageWhite 273
- ImageWrite 275
- Importomatic 284
- InfoCreate 285
- InteractiveRenderFilters 286
- 5 Nodes L-Q 289
- LightLink 292
- LightListEdit 294
- LiveGroup 295
- LiveGroupStack 296
- LocationCreate 297
- LodGroupCreate 298
- LodSelect 299
- LodValuesAssign 300
- LookFileAssign 302
- LookFileBake 302
- LookFileGlobalsAssign 303
- LookFileManager 305
- LookFileMaterialsIn 305
- LookFileMaterialsOut 306
- LookFileMultiBake 306
- LookFileOverrideEnable 308
- LookFileResolve 308
- Material 309
- MaterialStack 312
- MaterialAssign 312
- MaterialResolve 312
- NetworkMaterial 314
- NetworkMaterialParameterEdit 317
- NetworkMaterialSplice 318
- NonpersistentSwitch 320
- OCIOCDLTransform 320
- OCIOColorSpace 321
- OCIODisplay 321
- OCIOFileTransform 322
- OCIOLogConvert 323
- OCIOLookTransform 324
- OpResolve 324
- OpScript 325
- OrientConstraint 331
- ParentChildConstraint 331
- PointConstraint 332
- PrimitiveCreate 333
- PrmanGlobalSettings 334
- PrmanObjectSettings 337
- PrmanOutputChannelDefine 350
- PrmanShadingNode 351
- 6 Nodes R-Z 353
- RenderOutputDefine 356
- RenderScript 360
- RenderSettings 363
- ScaleConstraint 364
- ScenegraphGeneratorResolve 365
- ScenegraphGeneratorSetup 365
- ScenegraphXml_In 365
- ScreenCoordinateConstraint 366
- ShadowBranch 367
- ShadowManager 368
- TeapotCreate 369
- Teleport 371
- TimeOffset 371
- Transform3D 371
- VariableDelete 372
- VariableEnabledGroup 372
- VariableSet 373
- VariableSwitch 373
- VelocityApply 374
- ViewerObjectSettings 374
- VisibilityAssign 376
- ZoomToRect 377
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