Patent ID: 11908109
Assignee: MADVR HOLDINGS LLC
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. A device comprising:
a processor; and
a memory device coupled to the processor and having a program stored thereon for execution by the processor to perform operations comprising:
receiving a video sequence having image frames with a high dynamic range;
separating each image frame into low and high frequency components;
compressing the low frequency components using a non-linear brightness compression curve including tone mapping the low frequency components;
reducing brightness and saturation for pixels of the low frequency components which are outside a target gamut;
reconstructing the image frames of the video sequence by combining the high frequency components with the compressed and reduced brightness and saturation for pixels of the low frequency components; and
rendering the reconstructed image frames of the video sequence during real time playback for display on a device having a lower dynamic range, while preserving highlight detail, wherein tone mapping the low frequency components comprises:
determining a tone mapping for each successive image frame;
smoothing the tone mapping to reduce visible flickering artifacts;
detecting a scene change; and, discontinuing smoothing the tone mapping for a first image frame of the detected scene change.