CIE Scope (Visor CIE)¶

Descripción

This effect/filter displays a CIE color diagram with overlaid input pixels.

Truco

The effect uses the pixel format of the clip it is applied on in compositing. By default, CIE Scope just displays the scope, so if you want to overlay it on the clip itself, you need to put the clip in the track below. If that clip does not have an alpha channel, the scope will not overlay but obscure the clip below. You can add an Forma alfa effect to the clip, set the operations mode to Min, and adjust the size of the rectangle to the scope dimensions and thus get the CIE Scope to overlay the clip.

Parámetros

Parámetro	Valor	Descripción
Color System	Selection	Set color system to use
CIE System	Selection	Set CIE system to use
Gamuts to Draw	Selection	Set what gamuts to draw
Size	Entero	Set CIE Scope size, by default set to 512.
Intensity	Decimal	Set intensity used to map input pixel values to CIE diagram
Contrast	Decimal	Set contrast used to draw tongue colors that are out of active color system gamut
Display Correct Gamma	Switch	Correct gamma displayed on scope, by default enabled
Show White Point	Switch	Show white point on CIE diagram, by default disabled
Input Gamma	Decimal	Set input gamma. Used only with xyY input color space.
Fill with CIE Colors	Switch	Fill with CIE colors, by default enabled.

The following selection items are available:

Color System[1], Gamuts to Draw

NTSC	American standard for color TV. For the color space relevance, refer to this page in Wikipedia.
BT.470M	Same as NTSC
EBU	Color space used by the European Broadcasting Union (basically BT.601)
BT.470BG
SMPTE	Color space used by the Society of Motion Picture and Television Engineers (SMPTE)
BT.240M
Apple	Color space as defined by Apple RGB[1]
Wide RGB	Wide Gamut RGB[2] as defined by Adobe
CIE 1931	Color space as defined by CIE[3]
HD TV	Using the YCbCr color model (Rec. 709)
Rec. 709	Same as HD TV
UHD TV	Using the YCbCr color model (Rec. 2020)
Rec. 2020	Same as UHD TV
DCI-P3	Color space defined by DCI[4]

CIE System[1]

xyY	Using the CIE xyY[5] color space (derived from CIE XYZ).
UCS	CIE 1960 UCS[6] color space
LUV	CIELUV[7] (abbreviation for CIE 1976 L, u, v)

Examples

This shows the CIE Scope effect with the default settings. Depending on your source material the pixel distribution will look differently.

This shows the CIE Scope effect with the following settings:

Color System: CIE 1931
CIE System: UCS
Gamuts to Draw: SMPTE

This shows the CIE Scope effect with the following settings:

Color System: BT.470M

CIE System: LUV

Gamuts to Draw: Apple