Methods and apparatus for motion-based video tonal stabilization
OwnerOriel FRIGO, Neus SABATER +2inventors
InventorsOriel FRIGO, Neus SABATER, Pierre HELLIER, Julie DELON
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Abstract
One general aspect for motion-based video tonal stabilization uses a keyframe and motion estimation techniques to determine the level of spatial correspondence between input images and the keyframe. When the level of spatial correspondence is high, tonal stabilization is performed through regression and power law tonal transformation to minimize the color differences between images caused by automatic camera parameters without a priori knowledge of the camera model. Tonal error accumulation is reduced by using long-term tonal propagation.
Claims21
1-8. (canceled)
A method for correcting color and/or brightness instabilities of a sequence of images, said method comprising correcting color and/or brightness instabilities of at least one first image of said sequence according to a reference image, said reference image being determined between images of said sequence according to a number of motion based correspondences between said first image and said reference image.
An apparatus adapted for correcting color and/or brightness instabilities of a sequence of images, said apparatus comprising a processing circuitry adapted for correcting color and/or brightness instabilities of at least one first image of said sequence according to a reference image, said reference image being determined between images of said sequence according to a number of motion based correspondences between said first image and said reference image.
The apparatus of 19, wherein said second image is the last previously corrected image of said sequence.
A computer readable storage medium having stored thereon computer program comprising program code instructions for executing a method for correcting color and/or brightness instabilities of a sequence of images, said method comprising correcting color and/or brightness instabilities of at least one first image of said sequence according to a reference image, said reference image being determined between images of said sequence according to a number of motion based correspondences between said first image and said reference image.
Dependencies are inferred from the claim text.