AddLight 2 - user's guide

Operators

File operations

Load = selects an image or image sequence to use in Addlight 2.
Save = selects a location and name to save images processed in Addlight 2.

Composition operations

Use pictures with premultiplied alpha with these operators.
Copy Picture = duplicates the nomitated source layer to create a new destination layer.
Overlay = overlays the source image on the destination using the source images alpha channel ( source must be a 32bit tga or 32bit bmp).
Atop = overlays the source layer to the destination layer only where the destination picture is opaque.
Inside = copy the source image where the destination picture is opaque.
Outside = copy the source image where the destination picture is transparent.
Xor = same as overlay but the part where both pictures are opaque is deleted..

MISC. operations

No Operation = the default for a new line.

Color operations

Negative = Inverts all color and and tone information of the nominated layer.
Fill with color = creates a solid color which can be merged with an image according to the amount selected.
Gray level = converts the image to grayscale and allows the user to manipulate the pixel value of the grays by changing the original images RGB bias.
Modify saturation = modifies the image color saturation up or down according to the amount selected.
Modify hue = shifts the hue of the image according to the amount selected.
Gamma = modifies the image color gamma up or down according to the amount selected.
Contrast = modifies the image color contrast up or down according to the amount selected.

Arithmetic operations

Add = adds the RGB of the source and destination layers together - this tends to brighten the image.
Subtract = subtracts the RGB of the source from the destination layer - this tends to darken the image.
Difference = this subtracts the RGB of one layer from another depending on the which is brighter.
Multiply = this multiply the destination RGB by the source RGB- this tends to darken the image..
Screen = this adds brightness to destination RGB according to the amount of source RGB - this tends to brighten the image.
Mix = this blends the two layers according to the amount set by the slider.
Add alpha = adds the alpha of the source and destination layers together
Sub alpha = subtracts the alpha of the source from the destination layer

RGB operations

RGB balance = allows the user to modify the overall color bias of the image by adjusting RGB sliders -
Copy to Red = when applied from source to destination it modifies the color of the image by creating a tonal scale from red to its opposite, cyan *
Copy to Green = when applied from source to destination it modifies the color of the image by creating a tonal scale from green to its opposite, magenta *
Copy to Blue = when applied from source to destination it modifies the color of the image by creating a tonal scale from blue to its opposite, yellow*
Copy RGB to Alpha = create an alpha channel from RGB values.
Copy alpha to Alpha = copy the alpha chanel from the source picture to the alpha channel of the destination picture .
Multiply by Alpha = multiply the RGB by the alpha value.
Un-multiply by Alpha = retrieve the original RGB values from a premultiplied picture.
* When these are used inconjunction with RGB balance a greater range of 2 tone colors are created - ie red and green, blue and red etc

Advanced operations

Darken = only uses the color and tone of the pixels from the source layer when they are darker than the corresponding pixels of the destination layer
Lighten = only uses the color and tone of the pixels from the source layer when they are lighter than the corresponding pixels of the destination layer
Blur filter = apply a blur convolution to the picture. You can choose Gaussian or box.
Alpha blur filter = apply a blur convolution to alpha channel. You can choose Gaussian or box.
Sharp filter = apply a sharp convolution to the picture. You have the choice between 4 variations.
Edge filter = apply an edge detection or a emboss convolution. These filters are based on Laplacian matrix.
Grain = add an amount of grain to the RGB value. This grain can affect the RGB values uniformly or independantly.
Flip X = invert the picture horizontally.
Flip Y = invert the picture vertically.

 

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