Walker Effects Manual

Colorize

Colorize is a great tool for applying color schemes and tints to layers. With a variety of built-in presets, Colorize makes it fast and easy to remap an image to a certain look. There are also more advanced options such as the choice of 3 or 5 colors, input Cycle, and Composite Modes.

Color Presets

A wide range of common color corrections are listed in the presets menu. Typically these presets offer at least a good starting point. Choosing a preset may change the color values and the number of colors used.

Input

Colorizing works by remapping the values to the new colors. Any channel can be used to create the mapping.

Channel

This specifies which channel to map the new color to. Luminance is typically the channel used, but others can produce a more customized result.

Invert

Any Channel can be inverted. The invert operation is calculated before premultiplying or coloring.

Premultiply With Alpha

This multiplies the channel with the alpha, in effect combining them. Premultiply is calculated after Invert.

Cycle Mode

The Cycle Mode determines how values are handled beyond the normal value range when the Cycle is changed.

Cycle

The Cycle offsets the input phase of the Channel. This essentially cycles the grayscale gradient, wrapping it around. This can be useful for shifting colors through the image, or to alter the mapping created by a channel such as Hue. The Cycle Mode can be used to determine how the values are wrapped.

Levels

The Matte can be further adjusted using the Levels controls. These controls work similarly to the standard Levels effect.

Input Black

As the Input Black is increased, the channel becomes darker. Visually it appears as though the darker areas grow, eventually overtaking all pixels. The Input Black and Input White values can be moved closer together to create contrast.

Input White

Opposite of Input Black, Input White increases the range of white pixels. As the value is decreased, the brightness of the image increases until the whole image becomes white. When the Input White value is less than the Input Black, the Channel will be inverted.

Gamma

The grayscale levels between white and black can be biased towards either end of the spectrum using Gamma. At the default value of 1.0, the interpolation from black to white is even. Gamma values less than 1.0 bias the gray levels towards black, creating a darker image. When the Gamma value is greater than 1.0 the gray values are pushed towards white brightening the image.

Output Black

The Output Black value clamps the Matte value at the specified level. For example, if the value is set to 45, then no pixel in the resulting Matte will be darker than 45 (measured in bits per pixel).

Output White

The Output White level limits the maximum brightness of the Matte. For example, if Output White is set to 128, then no pixel in the resulting matte will be greater than 128.

Number of Colors

Colorize supports either 3 or 5 colors. When set to 3 colors the Mid-Shadow and Mid-Highlight controls become disabled.

Color Controls

Each color control targets its respective range of the image. The Shadow color, for example is mapped to the darkest areas of the image, while the Highlights are mapped to the brightest.

Composite Mode

You can use the Composite Mode to control how new color is mixed with the original layer colors. The default setting of Normal simply replaces the original layer colors. Other Composite Modes can be used to create more dynamic coloring effects.

Opacity

The amount of color applied is controlled by the Opacity. At a value of 0, no color is applied to the image, while at 100 the color is fully applied.