MM Solutions - Products

Video HDR

What is Video HDR?

Many of the scenes captured in practice exhibit dynamic range higher than the one representable by the contemporary image sensors, causing blackening the dark regions and overexposing (whitening) the bright ones.

The solution:

Multiple frames differently exposed can be combined such that dark regions to be taken from brighter frames and bright regions - from darker frames.

Highlights

MMS Video HDR algorithm consists of two parts:

  • AutoExposureControl (AEC), which regulates the exposure time of bright and dark frames
  • Frames fusion, which combines couples of bright/dark frames to produce HDR frames

MMS Video HDR algorithm features:

  • Suitable for various HDR sensors as well as for conventional sensors (sequentially altering bright and dark frames)
  • Adaptive AEC depending on the scene content and scene dynamic range
  • AEC regulates both dark and bright frame exposures
  • AEC can adapt to the specifics of different HDR sensors
  • The fusion utilizes automatic Global and Local Brightness and Contrast Enhancement (GLBCE, known also as tone mapping) to represent scene dynamics in the best way

MMS Video HDR algorithm features:

  • The fusion algorithm incorporates temporal smoothing of its parameters to guarantee smooth and pleasant HDR video
  • The fusion can be done efficiently on a graphics accelerator, using standard OpenGL/DirectX functionality, thus avoiding high processor load
  • The fusion algorithm can accept frame warping parameters from an external Video Stabilization (VSTAB) algorithm and execute simultaneous VSTAB warping and Video HDR fusion, thus halving the processor load and consumed memory bandwidth
  • No need of frames capture nor processing parameters passed from the camera driver to the fusion algorithm
  • No complex tuning, nor sensor calibration required

Example videos:

Screenshots:

Example videos:

Screenshots: