Microsoft Technology Licensing, LLC

Micosoft Corporation

Abhijit Sarkar

Robert L Chambers

Ralph A Lipe

Edward W Connell

Samu Matias Kallio

Dmitry Reshidko

Matthew Richard Wozniak

Tuomas Heikki Sakari Vallius

Mehmet Kucukgoz

Hiroo Umeno

Kari Jussi Ropo

Stefan Angelevski

Zhenhuan Wen

Shibu Kizhakke Vallathai

A method for setting a display white point comprises displaying images with a display including at least a first light source and a second light source. The first light source is configured to emit light having a first color and having a first temperature-dependent luminance change. The second light source is configured to emit light having a second color and having a second temperature-dependent luminance change. An internal display temperature is measured. Based on the internal display temperature being a first temperature, a first target white point is set to prioritize color accuracy. Based on the internal display temperature being a second temperature, greater than the first temperature, a second target white point is set to prioritize luminance output.

Setting white point based on display temperature

A method for digital image color conversion includes, at a first computing device, capturing a first digital image of a first real-world environment. Based on ambient lighting conditions of the first real-world environment, a first ambient lighting-agnostic digital image is generated using a capture-side ambient lighting color conversion. The first ambient lighting-agnostic digital image is transmitted to a second computing device in a second real-world environment. From the second computing device, a second ambient lighting-agnostic digital image is received, the second image having been generated by the second computing device from a second digital image using the capture-side ambient lighting color conversion. Based on the ambient lighting conditions of the first real-world environment, a lighting-corrected digital image is generated from the second ambient lighting-agnostic digital image using a display-side ambient lighting color conversion. The lighting-corrected digital image is displayed on the first computing device.

Color conversion for ambient-adaptive digital content

Sensor calibration methods and systems can for providing accurate color values are disclosed. In one example, a method includes obtaining color measurements that indicate an amount of ambient light, as well as clustering the color measurements, and storing cluster parameters for the clustered color measurements. The method can further include automatic calculation of, for each cluster, generic transformation parameters for conversion of a color measurement to a calibrated color value. In another example, a method can include exposing a light sensor to a calibration ambient lighting, calculating sensor correction parameters for the light sensor, and storing the calculated parameters. As an additional example, an electronic device is adapted to determine calibrated color values with machine readable media storing cluster parameters, sensor correction parameters, and generic transform parameters used by the electronic device to calculate calibrated color values for ambient light sensor measurements.

Color sensing ambient light sensor calibration

Systems and methods for determining a colorimetric value from color measurements for multiple ambient color sensors which for each color measurement, in various approaches, select a lighting cluster similar to the color measurement and determine whether the color measurement is valid or invalid based on a calculated similarity between the color measurement and the selected lighting cluster, calculate a weight for the color measurement for combination with other color measurements based on the calculated similarity between the color measurement and its selected lighting cluster, determine whether the color measurement is valid or invalid based on perceptual color space distances for the color measurement for multiple reference light sources, and/or calculate a weight for the color measurement for combination with other color measurements based on the perceptual color space distances for multiple reference light sources.

Use of multiple calibrated ambient color sensor measurements to generate a single colorimetric value

Calibrated brightness estimation using an ambient color sensor, involving determination and use of lighting cluster parameters effective for automatically identifying which of multiple lighting clusters is associated with a color measurement obtained for the ambient color sensor, and per-cluster sensor brightness estimation factors for each of the first plurality of lighting clusters.

Calibrated brightness estimation using ambient color sensors

Innovations in rendering of high dynamic range ('HDR') video on a display device having enhanced dynamic range ('EDR'). The peak brightness for an EDR display device is lower than the peak brightness for a typical HDR display device but higher than the peak brightness for a typical display device having standard dynamic range. The increased range of brightness values in an EDR display device can be utilized effectively to show bright highlights of the HDR video. For example, decision logic is configured to evaluate a peak brightness of a target display device and select an HDR-to-EDR tone mapping mode. A tone mapper is configured to apply tone mapping to input values for the sample values of HDR video, according to a tone mapping function, thereby producing output values for sample values of EDR video.

Architecture for rendering high dynamic range video on enhanced dynamic range display devices

The present invention provides a method and computer-readable medium for searching for programming objects on a computer system. Under the invention, object attributes that are stored outside of a static attribute storage area are inspected during the search for programming objects.

Method and apparatus for identifying programming object attributes

The present invention provides a method and computer-readable medium for searching for programming objects on a computer system. Under one aspect of the invention, optional search attributes are used to order a list of references to found programming objects. Under a second aspect of the invention, object attributes that are stored outside of a static attribute storage area are inspected during the search for programming objects. Under a third aspect of the invention, different sets of object data are allowed to reference the same programming object class, and different objects of a single programming object class may be initialized in different ways so that they exhibit different attributes.

The present invention provides a method and computer-readable medium for searching for programming objects on a computer system. Under one aspect of the invention, optional search attributes are used to order a list of references to found programming objects. Under a second aspect of the invention, object attributes that are stored outside of a static attribute storage area are inspected during the search for programming objects.

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Woodinville, WA, United States of America

Abhijit Sarkar