Patent
Representing and reconstructing high dynamic range images
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TLDR
In this article, an approximate impulse response function is determined by comparing the higher and lower-dynamic range images, and a scaling image obtained by applying the impulse-response function to a high-frequency band of the lower-dimensional range image is combined with an upsampled higher-dimensional image to yield a reconstructed image.Abstract:
A high dynamic range image can be recovered from a full-resolution lower-dynamic-range image and a reduced-resolution higher-dynamic-range image. Information regarding higher spatial frequencies may be obtained by extracting high spatial frequencies from the lower-dynamic-range image. In some embodiments an approximate impulse-response function is determined by comparing the higher- and lower-dynamic range images. A scaling image obtained by applying the impulse-response function to a high-frequency band of the lower-dynamic range image is combined with an upsampled higher-dynamic range image to yield a reconstructed image.read more
Citations
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References
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Journal ArticleDOI
Perception-motivated high dynamic range video encoding
TL;DR: A new approach for inter-frame encoding of HDR video is proposed, which is embedded in the well-established MPEG-4 video compression standard and requires only 10--11 bits to encode 12 orders of magnitude of visible luminance range and does not lead to perceivable contouring artifacts.
Patent
Software-based encoder for a software-implemented end-to-end scalable video delivery system
TL;DR: In this paper, a software-based encoder is provided for an end-to-end scalable video delivery system that operates over heterogeneous networks, where the encoder utilizes a scalable video compression algorithm based on a Laplacian pyramid decomposition to generate an embedded information stream.
Proceedings ArticleDOI
JPEG-HDR: a backwards-compatible, high dynamic range extension to JPEG
Greg Ward,Maryann Simmons +1 more
TL;DR: In this paper, a tone-mapped version of each HDR original is accompanied by restorative information carried in a subband of a standard output-referred image, which when multiplied by the tonemapped foreground, recovers the HDR original.
Backward Compatible High Dynamic Range MPEG Video Compression
TL;DR: A compact reconstruction function is introduced that is used to decompose an HDR video stream into a residual stream and a standard LDR stream, which can be played on existing MPEG decoders, such as DVD players.
Patent
High dynamic range image viewing on low dynamic range displays
TL;DR: In this paper, a background image constructed from HDR image information is displayed along with portions of the HDR image corresponding to one or more regions of interest, and an intermediate image or a derived image is then displayed.