Method and apparatus for encoding and decoding a light field based image, and corresponding computer program product

A device for encoding at least one block of pixels of a view belonging to a matrix of views obtained from light-field data associated with a scene, wherein said device comprises a processor configured to control:

• a module for predicting said at least one block of pixels to obtain a predicted block of pixels, said module comprising, for at least on pixel to predict of said block of pixels:
• an entity for obtaining, from said matrix of views, at least one epipolar plane image (EPI) to which said pixel to predict belongs,
• an entity for determining, among a set of unidirectional prediction modes, at least one optimal unidirectional prediction mode from a set of previous reconstructed pixels neighboring said pixel to predict in said at least one epipolar plane image,
• an entity for extrapolating a prediction value of said pixel to predict by using said at least one optimal unidirectional prediction mode,
• a module for determining a residual error corresponding to the difference between said at least one block of pixels and said predicted block of pixels,
• a module for encoding said residual error associated with said block of pixels.

A device for decoding a signal representing at least one block of pixels of a view belonging to a matrix of views obtained from light-field data associated with a scene, wherein said device comprises a processor configured to control:

• a module for decoding a residual error associated to said block of pixels,
• a module for predicting said at least one block of pixels to obtain a predicted block of pixels, said module comprising, for at least one pixel to predict of said block of pixels:
• an entity for obtaining, from said matrix of views, at least one epipolar plane image (EPI) to which said pixel to predict belongs,
• an entity for determining, among a set of unidirectional prediction modes, at least one optimal unidirectional prediction mode from a set of previous reconstructed pixels neighboring said pixel to predict in said at least one epipolar plane image,
• an entity for extrapolating a prediction value of said pixel to predict by using said at least one optimal unidirectional prediction mode,
• a module for reconstructing said at least one block of pixels by adding said residual error to said predicted block of pixels.