Back to results
US 2010/0134689 A1Published application
Dynamic contrast on displays using average picture level and histogram analysis
AssigneesSony Corporation, Sony Electronics Inc.
InventorsEmigdio Z. Flores, Mario Ramirez, Juan Flores, Eduardo Zuniga
Life of this patent
Estimating the term…
Abstract
Average picture level (APL) of a display and, in examples, histogram information is used to dynamically adjust the display contrast, or “gamma”, using an exponential function. APL can also be used for DC transmission adjustment and black/white stretch.
Claims20
Display system, comprising:
- video display;
- processor circuitry receiving demanded image information and adjusting the demanded image information for output on the display, the processor circuitry executing logic comprising:
- obtaining average picture level (APL) associated with the demanded image;
- using the APL to alter an intrinsic transfer curve associated with the demanded image;
- using the APL to alter a DC transmission characteristic associated with the demanded image;
- and
- using the APL to alter a black stretch and white stretch characteristic associated with the demanded image.
4 more elements
A display system comprising:
- a display;
- and
- a processor circuitry receiving an input signal representing a demanded image for the display and automatically altering a gamma of the input by applying an S-shaped transfer function to the input to produce an output used by the display to present the demanded image.
Machine-implemented method comprising:
- receiving a demanded image for a visual display, an input contrast being associated with the demanded image;
- altering the input contrast using at least one exponential function to produce an output contrast;
- implementing the output contrast in the demanded image;
- and
- presenting the demanded image on the display.
2 more elements
Dependencies are inferred from the claim text.