High dynamic range, backwards-compatible, digital cinema
First Claim
1. A method, comprising:
- receiving a data packet in a bit stream that conforms to the Digital Cinema Systems Specification of the Digital Cinema Initiative (DCI Systems Standard), the data packet comprising at least a portion of a high dynamic range (HDR) image, wherein the HDR image comprises (a) a coded baseline image that complies with the DCI Systems Standard, and (b) one or more HDR-enhancement images;
wherein the coded baseline image comprises at least three color components, wherein the coded baseline image and the one or more HDR-enhancement images each provides enhancement information to allow reconstruction of an instance of the received HDR image using the baseline image and the HDR-enhancement images;
processing the data packet to reconstruct the HDR image by extracting;
a first data set that relates to the coded baseline image for the at least three color components; and
a second data set that relates to the one or more HDR-enhancement images,wherein each of the HDR enhancement images comprises;
a first coded chroma residual image,a second coded chroma residual image, anda coded ratio image representing ratios of (i) luminance values of the HDR image and (ii) corresponding luminance values of a tone-mapped version of the HDR image,wherein each of the residual images is configured to capture chroma information lost in creating the baseline image from the HDR image,wherein the first coded chroma residual image and the second coded chroma residual image are based on the tone-mapped version of the HDR image and a re-mapped image representing an application of the ratios to the HDR image, andwherein the first coded chroma residual image is embedded within a first portion of the data packet that also includes baseline data for a first color component, the second coded chroma residual image is embedded within a second portion of the data packet that also includes baseline data for a second color component, and the coded ratio image is embedded within a third portion of the data packet that also includes baseline data for a third color component.
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Accused Products
Abstract
HDR images are coded and distributed. An initial HDR image is received. Processing the received HDR image creates a JPEG-2000 DCI-compliant coded baseline image and an HDR-enhancement image. The coded baseline image has one or more color components, each of which provide enhancement information that allows reconstruction of an instance of the initial HDR image using the baseline image and the HDR-enhancement images. A data packet is computed, which has a first and a second data set. The first data set relates to the baseline image color components, each of which has an application marker that relates to the HDR-enhancement images. The second data set relates to the HDR-enhancement image. The data packets are sent in a DCI-compliant bit stream.
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Citations
20 Claims
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1. A method, comprising:
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receiving a data packet in a bit stream that conforms to the Digital Cinema Systems Specification of the Digital Cinema Initiative (DCI Systems Standard), the data packet comprising at least a portion of a high dynamic range (HDR) image, wherein the HDR image comprises (a) a coded baseline image that complies with the DCI Systems Standard, and (b) one or more HDR-enhancement images; wherein the coded baseline image comprises at least three color components, wherein the coded baseline image and the one or more HDR-enhancement images each provides enhancement information to allow reconstruction of an instance of the received HDR image using the baseline image and the HDR-enhancement images; processing the data packet to reconstruct the HDR image by extracting; a first data set that relates to the coded baseline image for the at least three color components; and a second data set that relates to the one or more HDR-enhancement images, wherein each of the HDR enhancement images comprises; a first coded chroma residual image, a second coded chroma residual image, and a coded ratio image representing ratios of (i) luminance values of the HDR image and (ii) corresponding luminance values of a tone-mapped version of the HDR image, wherein each of the residual images is configured to capture chroma information lost in creating the baseline image from the HDR image, wherein the first coded chroma residual image and the second coded chroma residual image are based on the tone-mapped version of the HDR image and a re-mapped image representing an application of the ratios to the HDR image, and wherein the first coded chroma residual image is embedded within a first portion of the data packet that also includes baseline data for a first color component, the second coded chroma residual image is embedded within a second portion of the data packet that also includes baseline data for a second color component, and the coded ratio image is embedded within a third portion of the data packet that also includes baseline data for a third color component. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus comprising a processor, wherein the processor is configured to:
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receive a computed data packet in a bit stream that conforms to the Digital Cinema Systems Specification of the Digital Cinema Initiative (DCI Systems Standard), the data packet comprising at least a portion of a high dynamic range (HDR) image, wherein the HDR image comprises (a) a coded baseline image that complies with the DCI Systems Standard, and (b) one or more HDR-enhancement images; wherein the coded baseline image comprises at least three color components, wherein the coded baseline image and the one or more HDR-enhancement images each provides enhancement information to allow reconstruction of an instance of the received HDR image using the baseline image and the HDR-enhancement images; process the data packet to create the HDR image by extracting; a first data set that relates to the coded baseline image for the at least three color components; and a second data set that relates to the one or more HDR-enhancement images, wherein each of the HDR enhancement images comprise; a first coded chroma residual image, a second coded chroma residual image, and a coded ratio image representing ratios of (i) luminance values of the HDR image and (ii) corresponding luminance values of a tone-mapped version of the HDR image, wherein each of the residual images is configured to capture chroma information lost in creating the baseline image from the HDR image, wherein the first coded chroma residual image and the second coded chroma residual image are based on the tone-mapped version of the HDR image and a re-mapped image representing an application of the ratios to the HDR image, and wherein the first coded chroma residual image is embedded within a first portion of the data packet that also includes baseline data for a first color component, the second coded chroma residual image is embedded within a second portion of the data packet that also includes baseline data for a second color component, and the coded ratio image is embedded within a third portion of the data packet that also includes baseline data for a third color component. - View Dependent Claims (9, 10, 11, 12)
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13. A method, comprising:
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receiving a high dynamic range (HDR) image; processing the received HDR image, wherein the received HDR image comprises (a) a coded baseline image that complies with the Digital Cinema Systems Specification of the Digital Cinema Initiative (DCI Systems Standard), and (b) one or more HDR-enhancement images are created from the received HDR image; wherein the coded baseline image comprises at least three color components, wherein the coded baseline image and the one or more HDR-enhancement images each provide enhancement information to allow reconstruction of an instance of the received HDR image using the baseline image and the HDR-enhancement images; computing a data packet, wherein the data packet comprises; a first data set that relates to the coded baseline image for the at least three color components; and a second data set that relates to the HDR-enhancement images, wherein each of the HDR enhancement images comprises; a first coded chroma residual image, a second coded chroma residual image, and a coded ratio image representing ratios of (i) luminance values of the received HDR image and (ii) corresponding luminance values of a tone-mapped version of the received HDR image, wherein the first coded chroma residual image and the second coded chroma residual image are based on the tone-mapped version of the received HDR image and a re-mapped image representing an application of the ratios to the received HDR image wherein the first coded chroma residual image is embedded within a first portion of the data packet that also includes baseline data for a first color component, the second coded chroma residual image is embedded within a second portion of the data packet that also includes baseline data for a second color component, and the coded ratio image is embedded within a third portion of the data packet that also includes baseline data for a third color component; and sending the computed data packet in a bit stream that conforms to the DCI Systems Standard. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification