Apparatus for allowing operator selection of a color region of a video image for receiving color corrections

A system for correcting a video parameter of an image represented by an uncorrected input video signal, comprising:

• means for generating a variably positionable selection cursor on a video monitor displaying said input video signal;
• first operator control means for positioning said cursor on said video monitor;
• means responsive to the position of said cursor on the video monitor for providing cursor position signals;
• video signal correction means responsive to a video characteristic of said input video signal for selecting a particular one of a plurality of video signal correction signals for correction of a parameter of said input video signal to provide a corrected video output signal;
• second operator control means for changing one of said plurality of video signal correction signals;
• and
• means responsive to said video characteristic and said cursor position signals for modifying said selected particular one of said video signal correction signals.

A system for correcting a video parameter of an image represented by an uncorrected phase-encoded input video signal, comprising:

• phase detecting means responsive to detect relative phase between said input video signal and a phase reference signal;
• correction signal means responsive to said phase reference signal for providing a plurality of correction signals, each of said correction signals being related to a predetermined range of phase differences between said phase reference signal and said input video signal;
• means for generating a variably positionable selection cursor on a video monitor displaying said input video signal;
• first operator control means for positioning said cursor on said video monitor;
• means responsive to the position of said cursor on the video monitor for providing cursor position signals;
• second operator control means for changing one of said plurality of correction signals;
• correction signal selecting means responsive to said cursor position signals and a video characteristic of said input video signal for selecting a particular one of said plurality of correction signals for receiving changes from said second operator control means;
• and
• correction means responsive to said plurality of correction signals for correcting said input video signal to provide a corrected video output signal.

A system for correcting a video parameter of a portion of a video image represented by an uncorrected phase-encoded input video signal, said portion of said video image being at least partially defined by a predetermined hue, comprising:

• phase detecting means responsive to detect said predetermined hue by detecting relative phase between said input video signal and a phase reference signal and responsive to provide a chroma detect signal related to said predetermined hue;
• correction signal means responsive to said phase reference signal for repeatedly providing a plurality of correction signals, each of said correction signals being related to a predetermined range of phase differences between said phase reference signal and said input video signal;
• synchronizing means for causing said correction signal means to provide said plurality of correction signals each cycle of said phase reference signal;
• means for generating a variably positionable selection cursor on a video monitor displaying said video image;
• first operator control means for positioning said cursor on said video monitor and for providing cursor position signals related to the location of said cursor with respect to said video image;
• means responsive to said cursor position signals for providing a selection signal related to the cursor position with respect to said video image;
• correction signal selecting means responsive to the coincidence of said selection signal and said chroma detect signal for selecting a particular one of said correction signals;
• second operator control means for changing said selected particular one of said plurality of correction signals;
• and
• correction means responsive to said correction signals for correcting said input video signal to provide a corrected video output signal.

In a video signal color correction system, an apparatus for selecting a region in a video image represented by an input video signal and for correcting a video parameter of said input video signal, comprising:

• first operator control means for selecting a region on a video monitor displaying said image;
• addressable memory means for storing a plurality of video signal correction signals for correcting a parameter of said input video signal;
• second operator control means for providing operator correction signals;
• correction signal selecting means responsive to a video characteristic of said input video signal and said selected region for selecting a particular one of said stored plurality of video signal correction signals for receiving said operator correction signals;
• means for utilizing said stored video signal correction signals for correcting a parameter of said input video signal to provide a corrected video output signal.