Dolby Laboratories Licensing Corporation

Dolby Laboratories Licensing Corproation

Mahdi Nezamabadi

Scott J Daly

Jon Scott Miller

Robin Atkins

Neil W Messmer

Craig C Todd

A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

Perceptual luminance nonlinearity-based image data exchange across different display capabilities

In some embodiments, an encoding method for generating an extended dynamic range (EDR) channel in response to an input video channel, such that the EDR channel's code values consist of code values in a range from a standard black level, X, through a standard white level, Z, and an additional code value set. The EDR channel is displayable with standard dynamic range and standard precision by a standard dynamic range video system which maps to the level, X, any of the EDR channel's values less than X, and maps to the level, Z, any of the EDR channel's values greater than Z, and is displayable with an extended dynamic range greater than the standard dynamic range and/or a precision greater than the standard precision by an EDR video system. Other aspects are systems configured to perform embodiments of the encoding method, and methods and systems for displaying EDR video.

Method and system for backward compatible, extended dynamic range encoding of video

Several embodiments of image processing systems and methods are disclosed herein whereby at least one characteristic of an image displayed on a target display is changed according to information regarding the viewer's position&#x2014;e.g. distance to the target display, the visual angle the target display's subtends of the viewer's field of view. In one embodiment, luminance and/or contrast may be changed depending on the information regarding viewer's position relative to the target display.

Systems and methods of image processing that adjust for viewer position, screen size and viewing distance

Device and method of improving the perceptual luminance nonlinearity-based image data exchange across different display capabilities

A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.

Growing community of inventors

Moorestown, NJ, United States of America

Mahdi Nezamabadi