Color

The Color tool covers everything color-related: OpenColorIO settings, LUTs (look-up tables), and image adjustments such as brightness, contrast, levels, and exposure.

Locations: Tools menu, Tools toolbar

Shortcut: F4

The tool is divided into collapsible sections — OCIO, LUT, Color, Levels, Exposure, and Soft Clip — and each can be turned on or off independently using the checkbox in its header. This makes it easy to compare the image with and without a given adjustment.

OpenColorIO (OCIO)

The OpenColorIO configuration can be set to a built-in configuration, the OCIO environment variable, or a specific file path.

Input color spaces

The Input color space can be named explicitly, or left at None and resolved for each file. Resolving takes the first of:

• The extension assignments in the Color tool.
• What the file declares — a movie's color description, an OpenEXR file's chromaticities.
• A file rule from the configuration. The default rule, which matches every path, is not used.

The Color tool shows what was resolved and where it came from, and files being compared are each shown through their own input color space.

An OTIO timeline resolves per clip rather than as a whole.

Shortcuts:

• Toggle OCIO enabled: Ctrl+N

LUT

A LUT can be applied either before or after the OpenColorIO pass — set the LUT Order option to PreColorConfig or PostColorConfig as needed.

Shortcuts:

• Toggle LUT enabled: Ctrl+K

Supported LUT formats

The following LUT formats are supported:

• flame: .3dl
• lustre: .3dl
• ColorCorrection: .cc
• ColorCorrectionCollection: .ccc
• ColorDecisionList: .cdl
• Academy/ASC Common LUT Format: .clf
• Color Transform Format: .ctf
• cinespace: .csp
• Discreet 1D LUT: .lut
• houdini: .lut
• International Color Consortium profile: .icc
• Image Color Matching profile: .icm
• ICC profile: .pf
• iridas_cube: .cube
• iridas_itx: .itx
• iridas_look: .look
• pandora_mga: .mga
• pandora_m3d: .m3d
• resolve_cube: .cube
• spi1d: .spi1d
• spi3d: .spi3d
• spimtx: .spimtx
• truelight: .cub
• nukevf: .vf

Different formats may be available depending on how DJV was built.

Color

Basic color adjustments:

• Add — Add a constant value to each channel.
• Brightness — Scale the overall brightness.
• Contrast — Increase or decrease contrast around the midpoint.
• Saturation — Adjust color intensity, from grayscale up to oversaturated.
• Hue — Rotate the hue.
• Invert — Invert the image colors.

Levels

Levels remap the input tonal range to an output range, similar to the levels control in an image editor:

• In low / In high — The black and white points of the input.
• Gamma — A midtone adjustment applied between the input and output ranges.
• Out low / Out high — The black and white points of the output.

Exposure

Exposure controls mimic film response and are useful for high-dynamic-range images:

• Exposure — Overall exposure, in stops.
• Defog — Subtract a fog (haze) value.
• Knee low / Knee high — The range over which the highlight roll-off (the "knee") is applied.
• Gamma — A final gamma adjustment.

Soft clip

Soft clip gently rolls off values approaching white instead of clipping them hard, which helps preserve detail in bright highlights.