Smartek UCC User Manual page 143

As shown in Figure 113 as well, Saturation describes the intensity of a color. It defines how pale or strong
a color appears and is the intensity of a Hue from gray. At maximum saturation a color would contain no
gray at all, at minimum saturation a color would contain mostly gray. In the HSL color wheel the saturation
specifies the distance from the middle of the wheel in percent.
Lightness describes how bright or how dark a color appears. It defines how much white or black is contained
within a color.
Because of its characteristics of separating color and brightness information, the HSL color space fits for
various image processing functions such as convolution, equalization, histograms, which mainly use the
brightness information for calculation. As a result, computation performance may also increase due to
performing calculation only on one channel.
Gimp HSL in the CameraSuite SDK
In the CameraSuite SDK the ImageProcAPI provides the programming interface for configuring and
executing Gimp HSL algorithm. The bit depth and image type supported are shown in Table 61. For a
detailed description on how to use this feature please refer to the CameraSuite API Help located in the doc
folder of the CameraSuite SDK installation directory.
Supported image input
Hue (angle)
0 ◦
◦
60
◦
120
180 ◦
240 ◦
300 ◦
Table 60: HSL color space
Monochrome
Raw Bayer
Color RGB
Table 61: Gimp HSL - supported bit depth and image type
Color
red
yellow
green
cyan
blue
magenta
Supported bit depth
8 bit per channel
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User Manual - twentynine
16 bit per channel
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