Display backlight normalization

摘要

Techniques for displaying images of different dynamic ranges in a display system are provided. In some embodiments, images that have a number of dynamic ranges may be normalized to a configured dynamic range that corresponds to the full intensity reproduction capability of the device. The configured dynamic range may be wider, greater, or deeper than the relatively limited dynamic range.

主权项

1. A method for rendering images on a high dynamic range display system comprising:
receiving a first image; determining, based on the first image, a first dynamic range of luminous intensity; normalizing the first dynamic range of luminous intensity to a first configured dynamic range of luminous intensity; rendering the first image on the display system using the configured dynamic range of luminous intensity; outputting first image on the display system; receiving a second image, wherein the second image is different from the first image; determining, based on a second different image, a second dynamic range of luminous intensity, the second dynamic range being determined from the second image and differing from the first dynamic range; wherein the first dynamic range represents a wider dynamic range than the second dynamic range; normalizing the second dynamic range of luminous intensity to the second configured dynamic range of luminous intensity the first configured dynamic range is less than the second configured dynamic range; and rendering the second image on the display system using the second configured dynamic range of luminous intensity; outputting second image on the display system; wherein at least one of the first image and the second image comprises a low dynamic range (LDR) image, one of the first and second configured dynamic range comprises a high dynamic range (HDR), and at least one of the first dynamic range and the second dynamic range is smaller than one of the first and second configured dynamic range; wherein the steps of rendering the images comprises rendering the images on a locally dimmed display and normalizing the backlights of the display to a range of values having an upper limit that is less than the maximum light output level to which a backlight can be set but which comprises a light output level to produce an upper limit of a dynamic range selected for display of the images; and wherein the display system further comprises a dynamic range control to a user; the dynamic range control configured to accept a selection by the user of a configured dynamic range from at least two configurable dynamic ranges as supported by the display system.