FAQ¶
License?¶
New BSD.
You are welcome to include the OpenColorIO in commercial, or open source applications. See the License for further details.
Terminology¶
- Transform - a function that alters RGB(A) data (e.g transform an image from scene linear to sRGB)
- Reference space - a space that connects colorspaces
- Colorspace - a meaningful space that can be transferred to and from the reference space
- Display - a virtual or physical display device (e.g an sRGB display device)
- View - a meaningful view of the reference space on a Display (e.g a film emulation view on an sRGB display device)
- Role - abstract colorspace naming (e.g specify the “lnh” colorspace as the scene_linear role)
What LUT Formats are supported?¶
| Ext | Details | Notes |
|---|---|---|
| 3dl | Autodesk Apps: Lustre, Flame, etc. Supports shaper LUT + 3D | Full support. |
| csp | Cinespace (Rising Sun Research) LUT. Spline-based shaper LUT, with either 1D or 3D LUT. | Full support. Shaper LUT is resampled into simple 1D LUT with 2^16 samples |
| cub | Truelight format. Shaper Lut + 3D | Full support. |
| cube | Iridas format. Either 1D or 3D Lut. | Supports arbitrary input domains. Full support. |
| hdl | Houdini. 1D Lut, 3D lut, 1D shaper Lut | Only ‘C’ type is supported. Need to add R G B A RGB RGBA ALL. No support for Sampling tag. Header fields must be in strict order. |
| spi1d | 1D format. Imageworks native 1D lut format. HDR friendly, supports arbitrary input and output domains | Full support. |
| spi3d | 3D format. Imageworks native 3D lut format. | Full support. |
| spimtx | 3x3 matrix + color offset. Imageworks native color matrix format | Full support. |
Note
Shaper LUT application in OCIO currently only supports linear interpolation. For very small shaper LUT sizes this may not be sufficient.