Apple Inc.

Ian C Hendry

Kenneth I Greenebaum

Kenneth Christian Dyke

Eric Werner Anderson

Rajabali M Koduri

Jeffry E Gonion

Gabriel G Marcu

Geoffrey Grant Stahl

David Hayward

Nathaniel C Begeman

Anthony Graham Sumpter

Patrick L Coffman

Jerrold Von Hauck

Guy Cote

Christopher P Tann

Steve S Ko

Arthur L Spence

David J Redman

Vanessa Cristina Heppolette

Ross Thompson

Adrian T Sheppard

John C Gnaegy

Eve Brasfield

Paul Stephen Drzaic

Jean-Pierre Simon Guillou

Yifan Zhang

Tae-Wook Koh

Fernando A Urbina

John Kennedy Calhoun

George C Kyriazis

Eric L Dacquay

Jeffrey L Robbin

Michael F Culbert

Brijesh Tripathi

Jiaying Wu

Rainer Brodersen

Jeremy Sandmel

Tim Millet

Thomas Michael Madden

Ian R Ollmann

Kevin M Arnold

Thomas W Costa

Changki Min

Luke Stanislaw Wallis

Unmesh Sahasrabuddhe

David A Leech

Amanda R Rainer

Ingrid Aligaen

Chris Niederauer

Hans Werner Neubrand

Mike Nugent

Wei Chen

Victor H Yin

Jun Qi

Colin Whitby-Strevens

Bertrand Serlet

Marc Albrecht

Ali Sazegari

Rudolph Van Der Merwe

Richard E Crandall

Mingxia Gu

Nicolas P Bonnier

Lu Zhang

Brian D Howard

Jeffrey E Frederiksen

Arkady Ten

Bongsun Lee

Tobias Jung

Douglas P Mitchell

Yanming Li

Teun R Baar

Lars M Lindberg

Geoff Stahl

Konstantin Othmer

Robert L Ridenour

Jean-François Mulé

Travis W Brown

Andrew P Aitken

Maciej Maciesowicz

Alan M Dunn

Maciej Macicsowicz

David A Curran

Adam J Machalek

Greg Anderson

Michael Puckett

Phillip J Churchill

Philip J Churchill

Ian Ollman

Kenneth Greemebaum

A device comprises memory, a display characterized by a characteristic, and processors coupled to the memory. The processors receive data indicative of a preferred adaptation technique and intended display parameter. The processors adapt the content item to a display color space and the intended display parameter based on the preferred adaptation technique. The processors modify the intended display parameter based at least in part on the display characteristic to obtain a modified display parameter and cause the adapted content item to be displayed on the display according to the modified display parameter. In some embodiments, the processors obtain data indicative of ambient light conditions and adjust the modified display parameter based on the data indicative of ambient light conditions. In some embodiments, the processors cause the adapted content item to be displayed according to the adjusted and modified display parameter.

Automatic display adaptation based on environmental conditions

In some implementations, a computing device can perform multi-display alignment through observed user interactions. The computing device can receive user input aligning a first alignment object on a first display device with a second alignment object on a second display device. The computing device can align the display buffers for each display device based on the positions of the alignment objects in each display buffer corresponding to each display device. The computing device can align display buffers based on observed movements of graphical objects between multiple display devices. When display buffers corresponding to the display devices are misaligned, the user may correct the path of a graphical object when moving the graphical object between display devices. The computing device can detect the correction and align the display buffers of the display devices so that graphical objects are presented at the appropriate locations when moved between the display devices.

Multi-display alignment through observed interactions

Systems, methods, and computer readable media to improve the operation of a display system are disclosed. Techniques disclosed herein selectively darken a region of an image so that when text or other information is rendered into that region, the contrast between the text or other information and the underlying image in that area is sufficient to ensure the text or other information is visible and readable. In one embodiment, a region into which information is to be rendered may be combined or blended with tone mapped values of those same pixels in accordance with a given function, where the function gives more weight to the tone mapped pixel values the closer those pixels are to the midline of the region and more weight to untone-mapped image pixel values the further those pixels are from the midline of the region.

Rendering information into images

An output device is set to a first state in which a value of a first characteristic of the output device is set to a first value. Pixel adjustment values for plural gray levels are set to first pixel adjustment values in response to the output device being set to the first state. The value of the first characteristic is changed from the first value to a second value to set the output device to a second state. The pixel adjustment values for the plural gray levels are updated to second pixel adjustment values in response to the output device being set to the second state. The second pixel adjustment values are derived based on the second value of the first characteristic. Pixel values applied to a plurality of pixels of the output device are corrected based on the second pixel adjustment values.

Gray tracking across dynamically changing display characteristics

An electronic device may be provided with a display. A content generator may generate frames of image data to be displayed on the display. Control circuitry in the electronic device may be used in implementing a tone mapping engine. The tone mapping engine may display content from the content generator on the display in accordance with a content-luminance-to-display luminance mapping. The content-luminance-to-display-luminance mapping is characterized by tone mapping parameters such as a black level, a reference white level, and a specular white level. The tone mapping engine may adjust the tone mapping parameters based on ambient light levels, user brightness settings, content statistics, and display characteristics.

Electronic devices with tone mapping engines

A data processing system can store a long-term history of pixel luminance values in a secure memory and use those values to create burn-in compensation values that are used to mitigate burn-in effect on a display. The long-term history can be updated over time with new, accumulated pixel luminance values.

Long-term history of display intensities

Pixel values of image content are lowered in response to setting a display mode so that the lowered pixel values of the first image content are mapped to a first color gamut. The first color gamut is defined by a nominal range space and is lower than a native color gamut of a display panel. The native color gamut is defined by the nominal range space and an extended range space that is outside of the first color gamut. One or more parameters are obtained for the image content in the display mode. A color boosting operation is performed for, from among the lowered pixel values of the image content in the nominal range space, each of first pixel values that meet one of the parameters. A color associated with each of the first pixel values is proportionally enhanced without changing a corresponding hue to utilize the extended range space.

Color rendering for images in extended dynamic range mode

Systems, methods, and computer readable media to promote a graphics context when rendering a digital image content with dynamic ranges and/or color gamut outside the current graphics context. Various embodiments render digital image content based on a graphics context that corresponds to an initial image rendering format. During the rendering process a determination is made that indicates the quality of the digital image content exceeds the graphics context's initial capabilities. The various embodiments can select an updated image rendering format based on the quality of the digital image and expand the graphic context's capabilties to correspond with the updated image rendering format.

Dynamic selection of image rendering formats

Systems and methods are disclosed to enable switching of graphics processing unit (GPU) resources based on different factors. Embodiments include a virtual graphics driver as an interface between GPU drivers and the applications or graphics framework executing on an electronic device. The virtual graphics driver may switch GPU resources from a first GPU to a second GPU by routing function calls to the first GPU or the second GPU. The switching of GPU resources may be based on power management, system events such as hot-plug events, load management, user requests, any other factor, or any combination thereof. In some embodiments, a virtual frame buffer driver is provided that interfaces with the frame buffer of the GPU and provides a virtual view of the frame buffer to manage additional system application programming interfaces (APIs) during the switch.

Virtual graphics device driver

Scalable color balancing techniques for processing images to be presented on displays are described. One technique includes receiving ambient light color information from an ambient light sensor and input image data to be presented via a display coincident with receiving the ambient light color information. The display may have a first white point at a time prior to receiving the input image data. The technique may include determining a second white point for the display based on the input image data and the ambient light color information. The first and second white points may differ from each other. The technique may also include generating one or more chromatic adaptation transforms (CATs) based on the white points. Output image data may be generated based on applying the one or more CATs to the input image data. The output image data may be presented via the display. Other embodiments are described.

Scalable chromatic adaptation

Systems, methods, and computer readable media are described for effectively using dither techniques upon signals having a predicted quantization error that varies across the range of the signal. In some embodiments, predicted error is used to shape a precision input signal so that the newly-shaped signal yields a uniform or relatively uniform predicted quantization error. A dither is applied to the re-shaped signal, and the shaping is reversed, after which the signal may be slope limited and/or quantized, taking full and efficient advantage of the dithering technique.

System and method for improving graphics and other signal results through signal transformation and application of dithering

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San Jose, CA, United States of America

Ian C Hendry