0176B - Chroma Contamination
Summary
EBU QC Id
0176B
Name
Chroma Contamination
Status
published
Category
human-only review
Lead editor
Annabel Polanco
Aliases
Tags
vfx chroma green screen vfx mattes
Versions
Version Status Edition date Saved by Note
Details
Description
Chroma Contamination is the improper bleeding of colour values adjacent to each other in the frame, causing the intended colour value to shift.
Definition
Used in Checks, the system shall review content for chroma contamination. Optionally it may report the time location and position of the contamination in the frame.

Used in Reports, the system shall report timecode(s) at which chroma contamination exists and the position in the frame.
References
Examples
  • Output: "Check Result" = false
    Output: "Chroma Contamination Segment" from 00:00:30;00 to 00:30:05;00, SpatialRegion xywh=pixel:160,120,320,240
    Output: "Chroma Contamination Segment" from 00:00:34;00 to 00:34:11;00, SpatialRegion xywh=pixel:1020,460,300,140

    Remark: Used as a Check.


  • Output: "Chroma Contamination Segment" from 00:00:30;00 to 00:30:05;00, SpatialRegion xywh=percent:50,50,50,50
    Output: "Chroma Contamination Segment" from 00:00:34;00 to 00:34:11;00, SpatialRegion xywh=percent:50,50,50,50

    Remark: Used as a Report. Note the Spatial Region here refers to the bottom-right quadrant of the image.

Input parameters
Name Default value Description Data model name Unit Locator
Output parameters
Name Alias Description Data model name Unit Locator
Test material
Title Version Download
Remarks
Remarks
User discussions
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