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US 7,924,261 B2Granted
Methods and systems for determining a display light source adjustment
AssigneeSharp Laboratories of America, Inc.
InventorLouis Joseph Kerofsky
Life of this patent
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Abstract
Embodiments of the present invention comprise systems, methods and devices for adjusting display light source levels for enhanced image display.
Claims6
A method for determining a display source light reduction factor, said method comprising:
- analyzing an input image histogram for a first color channel of said input image;
- determining a first clipped percentage of pixels that are clipped in said first color channel of said input image;
- determining a first clipped code value, Cvclipped, corresponding to said first clipped percentage of pixels that are clipped;
- determining a first distorted percentage of pixels that are distorted in said first color channel of said input image;
- determining a first distorted code value, Cvdistorted, corresponding to said first distorted percentage of pixels that are distorted;
- and
- calculating a source light reduction factor that is proportional to a quantity raised to the power of a display gamma value, wherein said quantity is equal to the average of said Cvdistorted and said Cvclipped divided by a maximum value of said first color channel.
4 more elements
A method for determining a display source light reduction factor, said method comprising:
- analyzing an input image histogram for a first color channel of said input image;
- determining a first clipped percentage of pixels that are clipped in said first color channel of said input image;
- analyzing an input image histogram for a second color channel of said input image;
- determining a second clipped percentage of pixels that are clipped in said second color channel of said input image;
- selecting a maximum clipped percentage value of said first clipped percentage and said second clipped percentage;
- determining a maximum clipped code value, Cvclipped, based on said maximum clipped percentage value;
- determining a first distorted percentage of pixels that are distorted in said second color channel of said input image;
- determining a second distorted percentage of pixels that are distorted in said second color channel of said input image;
- selecting a maximum distorted percentage value of said first distorted percentage of pixels that are distorted and said second distorted percentage of pixels that are distorted;
- determining a maximum distorted code value, Cvdistorted, based on said maximum distorted percentage value;
- and
- calculating a source light reduction factor that is proportional to a quantity raised to the power of a display gamma value, wherein said quantity is equal to the average of said Cvdistorted and said Cvclipped divided by a maximum value of said first color channel and said second color channel.
9 more elements
An apparatus for determining a display source light reduction factor, said apparatus comprising:
- a first color channel analyzer for determining a first clipped percentage of clipped pixels in a first image color channel;
- a second color channel analyzer for determining a second clipped percentage of clipped pixels in a second image color channel;
- a clipped percentage selector for selecting a maximum clipped percentage value of said first clipped percentage of clipped pixels and said second clipped percentage of clipped pixels;
- a first clipped code value selector for determining a clipped code value, Cvclipped corresponding to said maximum clipped percentage value;
- a third color channel analyzer for determining a first distorted percentage of distorted pixels in said first image color channel;
- a fourth color channel analyzer for determining a second distorted percentage of distorted pixels in said second image color channel;
- a distorted percentage selector for selecting a maximum distorted percentage value of said first distorted percentage of distorted pixels and said second distorted percentage of distorted pixels;
- a distorted code value selector for determining a distorted code value, Cvdistorted, corresponding to said maximum distorted percentage value;
- and
- a processor for calculating a source light reduction factor that is proportional to a quantity raised to the power of a display gamma value, wherein said quantity is equal to the average of said Cvdistorted and said Cvclipped divided by a maximum value of said first color channel and said second color channel.
7 more elements
Dependencies are inferred from the claim text.