Filters & Adjustments

These group includes nodes to improve image quality and color grade, as well as tools for image analysis and value manipulation.

Vibrance

_images/vibrance.jpg

Works like in the filter in Darkroom and many other 2D editors. Adds more saturation in the less saturated areas, and less in the more saturated ones.

Inputs Description
Image Original image
Intensity Strength of the effect
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

Vibrance by Luminance

_images/vibrance_by_luminance.jpg

Works like Vibrance, but also takes into account brightness. Lighter areas will get less saturation (or even get desaturated) while darker areas get more saturation.

Inputs Description
Image Original image
Intensity Strength of the effect
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

Channel Transform

_images/channel_transform.jpg

Apply different transforms to each image channel.

Inputs Description
Image Original image
X Horizontal position
Y Vertical position
Angle Rotation
Width Channel Width
Height Channel Height
Opacity Opacity
Mask Mask out areas of the effect

(these settings are repeated for each channel)

Outputs Description
Image The resulting image

High Pass Filter

_images/highpass.jpg

This node can be used for many things, just like in 2D editors. Google “High Pass Filter” to find more ideas and tutorials.

Inputs Description
Intensity How much of the effect is applied
Radius How much blur to use in the effect
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

High Pass Sharpening

_images/highpass_sharpening.jpg

Sharpens the image using the High Pass filter.

Inputs Description
Image Original image
Intensity How much of the effect is applied
Radius How much blur to use in the effect
Mask Mask out areas of the effect
Outputs Description
Image The resulting image
Edges Edges from the image

Clamp

_images/clamp.jpg

Clamps brightness to be between the maximum and minimum. You can use this node to get animations/video in legal range for broadcast, or to clamp an input value for a node group.

Inputs Description
Image Original image
Maximum Clamp high values to this number
Minimum Clamp low values to this number
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

Highlight out of Range

_images/out_of_range.jpg

Colors pixels that are above the maximum or below the minimum brightness.

Inputs Description
Image Original image
Maximum Values above this number will be colored
Minimum Values below this number will be colored
Above Max Color Color for values above maximum value
Below Min Color Color for values above minimum value
Outputs Description
Image The resulting image
Above Max Mask Mask of values above maximum
Below Min Mask Mask of values above minimum

Shadow gain

_images/shadow_gain.jpg

Pump the shadows. They can also add a little extra to each of the RGB channels (it can be used to make shadows colder for instance).

Inputs Description
Image Original image
Intensity Strength of the effect
Tweak Blue/Green/Red Increase or decrease the effect on each channel
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

Light gain

_images/light_gain.jpg

Pump the highlights. They can also add a little extra to each of the RGB channels

Inputs Description
Image Original image
Intensity Strength of the effect
Tweak Blue/Green/Red Increase or decrease the effect on each channel
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

Separate by Luminance

_images/lum_masks.jpg

Creates three masks: Shadows, Highlights, and Mid-tones. Each setting includes a “Mask Tweak” value to modify the mask.

Inputs Description
Image Original image
Highlights Threshold to consider a value a highlight
Highlights Mask Tweak Tweak mask by changing contrast
Mid-tones High Threshold to consider a value a mid-tone (maximum)
Mid-tones High Mask Tweak Tweak mask by changing contrast
Mid-tones Low Threshold to consider a value a mid-tone (minimum)
Mid-tones Low Mask Tweak Tweak mask by changing contrast
Shadows Threshold to consider a value a shadow
Shadows Mask Tweak Tweak mask by changing contrast
Mask Mask out areas of the effect
Outputs Description
Highlight Mask Greyscale image for highlights
Mid-tones Mask Greyscale image for mid-tones
Shadows Mask Greyscale image for shadows

Color by Luminance

_images/color_by_luminance.jpg

Colorizes the image based on the base hue, and shifts it according to brightness.

Hue goes from 0.0 to 1.0. Both ends are red. Shifting is done by adding to the base hue. For instance: A base hue of 0.5 with a Max hue shift of 0.25, would yield hues in the range 0.5-0.75.

This node is specially useful for coloring greyscale images with a more realistic approach than just using a single color.

Inputs Description
Image Original image
Base Hue Hue to use when coloring
Maximum Hue Shift How much to add to the hue from brightness changes
Soften Soften hue changes
Saturate Saturation of colorization
Luminance Influence How much luminance influences hue
Saturate by Luminance Saturate or desaturate using luminance
Mask Mask out areas of the effect
Outputs Description
Image The resulting image

Two-Tone Mixer

_images/two_tone.jpg

Changes the tones of both lights and shadows without changing their brightness.

Inputs Description
Image Original image
First Tone Color(s) to mix with shadows
Second Tone Color(s) to mix with medium tones and highlights
First Tone Influence Mix factor for first tone
Second Tone Influence Mix factor for second tone
Mask Mask out areas of the effect
Outputs Description
Image The resulting image