Patent ID: 11949921
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 1:
2. A method of image transformation comprising:
deformatting an input video signal to obtain a DCT-compressed input image and parameter data from the image signal, wherein the DCT-compressed input image comprises pixels which have colors which encode input luminances;
decompressing the DCT-compressed input image to obtain a decompressed input image comprising applying at least an inverse DCT transform;
performing dynamic range conversion to obtain output colors which encode output luminances, by successively applying to the colors
a loggamma mapping, and
a monotonically increasing arbitrary tone mapping,
wherein the parameters which define the arbitrary monotonically increasing tone mapping are received in the parameter data.