User Manual

Inspector
Controls Tab
The Controls tab in the Color Space node consists of two menus. The top Conversion menu
determines whether you are converting an image to RGB or from RGB. The bottom menu
selects the alternative color space you are either converting to or from.
Conversion
This menu has three options. The None option has no effect on the image. When To Color is
selected, the input image is converted to the color space selected in the Color Type control
found below. When To RGB is selected, the input image is converted back to the RGB color
space from the type selected in the Color Type menu (for example, YUV to RGB).
Color Type
This menu is used to select the color space conversion applied when the To Color conversion
is selected. When the To RGB option is selected in the Conversion menu, the Color Type option
should reflect the input image’s current color space. There are eight color space options to
choose from.
 HSV (Hue, Saturation, and Value): Each pixel in the HSV color space is described in
terms of its Hue, Saturation, and Value components. Value is defined as the quality by
which we distinguish a light color from a dark one or brightness. Decreasing saturation
roughly corresponds to adding white to a paint chip on a palette. Increasing Value is
roughly similar to adding black.
 YUV (Luma, Blue Chroma, and Red Chroma): The YUV color space is used in the
analog broadcast of PAL video. Historically, this format was often used to color correct
images because of its familiarity to a large percentage of video engineers. Each pixel is
described in terms of its Luminance, Blue Chroma, and Red Chroma components.
 YIQ (Luma, In Phase, and Quadrature): The YIQ color space is used in the analog
broadcast of NTSC video. This format is much rarer than YUV and almost never seen in
production. Each pixel is described in terms of its Luminance, Chroma (in-phase or red-
cyan channel), and Quadrature (magenta-green) components.
 CMY (Cyan, Magenta, and Yellow): Although more common in print, the CMY format
is often found in computer graphics from other software packages. Each pixel is
described in terms of its Cyan, Magenta, and Yellow components. CMY is nonlinear.
 HLS (Hue, Luminance, and Saturation): Each pixel in the HLS color space is described
in terms of its Hue, Luminance, and Saturation components. The differences between
HLS and HSV color spaces are minor.
Chapter – 85 Color Nodes 1879