Eyeon:Manual/Tool Reference/Color/Color Gain
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Color Tools |
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Color Gain
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Color Gain [Clr] | |
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The Color Gain tool contains options for adjusting the gain, gamma, saturation and hue of the image. Many of the controls provided by the color gain tool are also found in the Color Corrector tool, but this simpler tool may render more quickly. One feature that distinguishes the color gain tool from the color corrector is its balance controls. These can be used to adjust the tinting of the colors in the high, mids and lows. |
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Gain Tab
When selected, the Red, Green and Blue channel controls for each effect are combined into one slider. Alpha channel effects remain separate.
The Gain RGBA controls multiply the values of the image channel in a linear fashion. All pixels are multiplied by the same factor, but the effect will be larger on bright pixels and smaller on dark. Black pixels will not be changed (x * 0=0).
The Gamma RGBA controls affect the brightness of the mid-range in the image. The affect of this tool is non-linear. White and black pixels in the image are not affected when gamma is modified, whereas pure grays are affected most by changes to this parameter. Large value changes to this control will tend to push mid-range pixels into black or white, depending on the value used.
Selecting this checkbox will cause the image pixel values to be divided by the alpha values prior to the color correction, and then re-multiplied by the alpha value after the correction. This helps to avoid the creation of illegally additive images, particularly around the edges of a blue/green key or when working with 3D rendered objects.
Saturation Tab
This setting controls the intensity of the colors in the image channels. A value of 0.0 will strip all of the color out of an image channel. Values greater than one will intensify the colors in the scene, pushing them toward primary colors.
Balance Tab
This section of the color gain tool offers controls for adjusting the overall balance of a color channel. Independent color and brightness controls are offered for the High, Mid and Dark ranges of the image.
Colors are grouped into opposing pairs from the two dominant color spaces. Red values can be pushed toward Cyan, Green Values to Magenta and Blue to Yellow. Brightness can be raised or lowered for each of the channels.
By default, the balance sliders can be adjusted by -1 to +1, but values outside of this range can be entered manually to increase the effect. A value of 0.0 for any slider indicates no change to the image channel. Positive and negative values indicate that the balance of the image channel has been pushed toward one color or the other in the pair.
Hue Tab
Use the Hue section of the color gain tool to shift the overall hue of the image, without affecting the brightness or saturation. Independent control of the High, Mid and Dark ranges is offered by three sliders.
The following is the order of the hues in the RGB color space; Red, Yellow, Green, Cyan, Blue, Magenta and Red
Values above 0 push the hue of the image toward the right (red turns to yellow). Values below 0 push the hue toward the left (red turns to magenta). At -1.0 or 1.0, the hue completes the cycle and returns to its original value.
The default range of the hue sliders is -1.0 to +1.0. Values outside of this range can be entered manually.
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