Chroma Key DirectShow Filter

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This page is a copy of the original page on the AVObjects' web site and can also be viewed here.

High-quality DirectShow chroma key solution.

Overview

Chroma key is a technology used in motion picture, television and photographic applications to remove solid-colored backgrounds (usually green or blue) and replace them with transparency to enable background replacement. This technology is sometimes refefrred to color keying, colour-separation overlay, greenscreen or bluescreen.

In our implementation we use several two-layred elippsoids floating in the RGB, YUV or HLS colorspace cube to isolate color regions to be removed (made transparent) in the image.

We claim that our technology offers the best quality among PC-based solutions capable of performing in real-time.

DirectShow Filter Specs

Input:

  • YUV or RGB image or video

Outputs:

  • ARGB image or video
  • Keying mask (black&white)
  • Preview (video keyed over selectable background)

Features

  • Quality processing of image borders by a two-layred ellipsoid in a color space cube. Transparency between the two ellipsoids changes in a linear way from fully transparent to non-transparent.
  • Advanced anti-splil correction algorithm: for quality processing of image borders.
  • Several color ranges to process complex backgrounds.
  • Support for RGB, YUV and HLS color spaces.
  • Separate pin for mask output (to enable external keying).
  • Separate pin for preview (video keyed over selectable background) to simplify tuning.
  • Property page with ability to configure chroma key setting by interacting with a video frame from the source video.

Editions

Feature Basic Pro
Two-layered elipsoid for quality border processing
Advanced anti-splil correction algorithm
Several color ranges
RGB color space support
YUV color space support
HLS color space support

External Links

Download

Chroma Key DirectShow Filter

Licensing

If you are interested in licensing this product please contact us through the link below.

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