Luminance comfort prediction and adjustment

Number: 10380973
Published: 2019-08-13
Filed: 2017-02-01
Assignee: Disney Enterprises, Inc.
Inventors: Aydin; Tunc Ozan et al.
CPC: G09G5/10; G09G5/005; G09G5/02
Verdict: Set aside luminance comfort prediction/adjustment, generic display processing
Source: Google Patents · FreePatentsOnline

Abstract

One or more levels of maladaptation are calculated relative to frames of media content having abrupt jumps from periods of low illumination to bright illumination when visual acuity may be lost and/or discomfort may be experienced. These levels of maladaptation may be correlated with subjectively determined levels of perceived luminance discomfort. Based upon the levels of perceived luminance discomfort that can be derived from the levels of maladaptation, the media content may be adjusted.

Background

TECHNICAL FIELD(1) The present disclosure relates generally to image processing.DESCRIPTION OF THE RELATED ART(2) Interest in distributing video or other visual content having high dynamic range (HDR) is growing due to its ability to provide an enhanced viewing experience compared to conventional standard dynamic range (SDR) content. However, content that is filmed in HDR and/or presented on an HDR display may have downsides associated with the extended dynamic range. For example, a viewer's visual system may become strained during abrupt transitions from dark frames of content to much brighter frames of content. This can lead to viewing discomfort.BRIEF SUMMARY OF THE DISCLOSURE(3) In accordance with one embodiment, a computer-implemented method, comprises analyzing media content and computing one or more adaptation states relative to the media content. The computer-implemented method further comprises correlating the one or more adaptation states to one or more corresponding levels of perceived luminance discomfort experienced by a viewer of the media content. Further still, the computer-implemented method comprises adjusting luminance of the media content to comport with one or more desired luminance-based effects. In one aspect, the analyzing of the media content comprises determining a luminance level associated with a pixel of a frame of the media content. In another aspect, the analyzing of the media content comprises determining a luminance level associated with a spa

Claims

1. A computer-implemented method, comprising: analyzing media content and computing one or more adaptation states relative to the media content by estimating a perceived magnitude of maladaptation; quantifying the perceived magnitude of maladaptation in terms of perceived luminance discomfort by correlating the one or more adaptation states to one or more corresponding levels of perceived luminance discomfort experienced by one or more viewers of test media content, the test media content comprising known variations in luminance; and adjusting luminance of the media content to comport with one or more desired luminance-based effects relative to the perceived luminance discomfort. 12. A system, comprising: one or more processors; and a memory having computer code being executed to cause the one or more processors to: analyze one or more pixels of a frame of media content; compute one or more adaptation states by estimating a perceived magnitude of maladaptation relative to each of the one or more pixels; quantify the perceived magnitude of maladaptation in terms of perceived luminance discomfort by translating the one or more adaptation states to one or more estimates of perceived luminance discomfort experienced by one or more viewers of test media content, the test media content comprising known variations in luminance, when the one or more adaptation states is indicative of maladaptation of a visual system viewing the media content; and adjust luminance of the media content to comport with one or more desired luminance-based effects relative to the perceived luminance discomfort.