User Manual

Addition
The result of adding the blending image to the original can produce values > 255. If a component of the
resulting is larger than 255, it will be clipped to 255. The result color is: R=O+B.
Subtraction
The result of subtracting the blending image from the original can produce negative values. If a component of
the resulting is less than zero, it will be clipped to 0. The result color is: R=O-B.
Darken Only
For each pixel comparing the value in each channel and selects whichever is smaller as the result color. The
result color is: R=min (O, B)
Lighten Only
For each pixel comparing the value in each channel and selects whichever is larger as the result color. The
result color is: R=max (O, B).
Hue
The hue of the result image comes from the blending image, and the saturation and value come from the
original image. The result color is R=(h(B), s(O), v(O)).
Saturation
The saturation of the result image comes from the blending image, and the hue and value come from the
original image. If the blending image is gray and no saturation, then this mode causes no effect to the image.
The result color is R=(h(O), s(B), v(O)).
Value
The value of the result image comes from the blending image, and the hue and saturation come from the
original image. The result color is R=(h(O), s(O), v(B)).
Color
The hue and saturation of the result image come from the blending image, and the lightness comes from the
original image. The result color is R=(h(B), s(B),l(O)). This method can be used to replace color (see Example
10.1).
Burn
It darkens the highlight area of original image. If using with a paint brush on highlight area, it will bring out the
details of the area. The result color is: R = 255-((256 x (255-B))/(O+1)). The white blending color has no
effect on the image.
Dodge
It lightens the shadow area of original image. If using with a paint brush on shadow area, it will bring out the
details of the area. The result color is: R = (256 x O)/((255-B)+1). The black blending color has no effect on
the image.
Soft Light
It gives the smooth edge and soft image.
Hard Light
It gives the sharp edge and bright image.