Methods and systems for displays with chromatic correction with differing chromatic ranges

Abstract

The invention relates to methods and systems for displays with chromatic correction having differing chromatic ranges. A method comprises carrying out (530) an initial chromatic correction on an image content source by means of a display of the reference type having a reference chromatic range to give a reformatted image content having undergone a chromatic correction for display on displays of the reference type with the reference chromatic range. The method further comprises determining (586) a first set of metadata defining a description of mapping a chromatic range for a chromatic range mapping of a display of the non-reference type with a non-reference chromatic range into the display of the reference type. The method further comprises carrying out (535) an ultimate chromatic correction by means of the display of the non-reference type and reformatted image content having undergone a chromatic correction to give a second set of metadata relating to displays of the non-reference type with the non-reference chromatic range. The method further comprises generating (566) a final set of metadata from the first set of metadata and the second set of metadata for an ultimate chromatic transformation which chromatically transforms the reformatted image content having undergone a chromatic correction for display on a display of the non-reference type for client use. The image source content is reformatted for client use only by displays of the reference type having the reference chromatic range.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application 60 / 921,579, filed April 3, 2007, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to television displays and, more particularly, to color correction methods and systems for providing predictable display results on displays having different color gamuts. Background technique [0004] In today's motion picture industry, the color of motion picture content is largely graded for displays with a single color gamut defined by cathode ray tube (CRT) phosphor colors, which correspond to European Broadcasting Union (EBU) or Society of Motion Picture and Television Engineers Color Standard (SMPTE-C) for SD and International Telecommunication Union (ITU) 709 colors for HD. These are the current standards for determining the reference color gamut (RCG) for display. However, the majority...

AI Technical Summary

Problems solved by technology

If a monitor with a color gamut not equal to RCG (CG2) is used for the display, the image will look incorrect and the artifacts described above will appear

Images