Color Swapping

Definition

• Substituting a specific color in an image with some targeted color for the purpose of exploration, design, image, and creation.

Color Spaces

• Different numerical systems to represent the association of color/colors in a particular display/image.

$\bullet$ RGB Color Space

• 3-dimensional space based on an $RGB$ color
• Any color is a mixture of different intensities of the three primary color components (RGB)

$\bullet$ HSV Color Space

• Separate components for representing color and intensity
• Hue
• Represents the color of a pixel with a value ranges from 0 to 360 (azimuthal angle)
• Saturation
• amount of purity and colorfulness of a color.
• Lower saturation $\Rightarrow$ faded or grayed out.
• Value
• the brightness or darkness of a hue

$\bullet$ LAB color space

• Similar to how HSV color space separate color components to represent
• 2 components to represent color and 1 separate component for brightness value
• 128 is the neutral value (gray) for both A and B
• L
• Lightness component
• $0: Black\quad\quad100: White$
• A
• color component specifying the combination of Red and Green
• $a< 0\quad(\rightarrow green)\quad\quad a > 0\quad(\rightarrow red)$
• B
• color component specifying the combination of Blue and Yellow
• $a< 0\quad(\rightarrow blue)\quad\quad a > 0\quad(\rightarrow yellow)$