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US 8,913,089 B2Granted
Methods and systems for enhancing display characteristics with frequency-specific gain
AssigneeSharp Laboratories of America, Inc.
InventorsLouis Joseph Kerofsky, Scott James Daly
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Abstract
Embodiments of the present invention comprise systems, methods and devices for increasing the perceived brightness of an image. In some embodiments this increase compensates for a decrease in display light source illumination.
Claims19
A method for adjusting an image for increased brightness, said method comprising:
- a) filtering an image to create a low-pass (LP) image and a high-pass (HP) image;
- b) applying a tone scale adjustment model exclusively to said LP image to form an adjusted LP image, wherein said tone scale adjustment model increases pixel values in said LP image of said image;
- c) applying a constant, positive gain exclusively to said HP image to form an adjusted HP image, wherein the magnitude of said gain is greater than 1 and wherein said applying is performed by a computing device comprising a processor and a memory;
- d) adding said adjusted LP image to said adjusted HP image to form a brightness-enhanced image.
1 more element
A method for adjusting an image for increased brightness, said method comprising:
- a) applying a low-pass (LP) filter to an image to create an LP version of said image;
- b) subtracting said LP version of said image from said image to create a high-pass (HP) version of said image;
- c) applying a tone scale adjustment model exclusively to said LP version of said image to form an adjusted LP image, wherein said tone scale adjustment model increases pixel values in said LP version of said image;
- d) applying a constant, positive gain exclusively to said HP version of said image to form an adjusted HP image, wherein the magnitude of said gain is greater than 1 wherein said applying is performed by a computing device comprising a processor and a memory;
- e) adding said adjusted LP image to said adjusted HP image to form a brightness-enhanced image.
2 more elements
An apparatus for adjusting an image for increased brightness, said apparatus comprising:
- a) a low-pass (LP) filter for filtering an image and creating a LP version of said image;
- b) an LP tone scale adjustment model for exclusively adjusting only said LP version of said image thereby creating an adjusted LP image, wherein said tone scale adjustment model increases pixel values in said LP version of said image;
- c) a processor for subtracting said LP version of said image from said image to create a HP version of said image;
- d) a second processor for applying a constant, positive gain exclusively to said high-pass (HP) version of said image to form an adjusted HP image, wherein the magnitude of said gain is greater than 1;
- e) an adder for adding said adjusted LP image to said adjusted HP image to form a brightness-enhanced image.
2 more elements
Dependencies are inferred from the claim text.