Image data encapsulation
A method of encapsulating an encoded bitstream representing one or more images, the encapsulated bitstream comprising a data part and a metadata part. The method including providing image item information identifying a portion of the data part representing a sub-image or an image of a single image; providing image description information comprising parameters including display parameters and/or transformation operators relating to one or more images and outputting said bitstream together with said provided information as an encapsulated data file, wherein the image description information is stored in the metadata part.
1. A method of encapsulating an encoded bitstream representing one or more images, the method comprising:
providing image item information identifying a portion of a data part representing a single image or a sub-image of a single image;
providing image description information comprising parameters including display parameters and/or transformation operators relating to one or more images; and
outputting the encoded bitstream together with the provided image item information and the provided image description information as an encapsulated data file, the encapsulated data file comprising the data part and a metadata part;
wherein the image description information is stored in the metadata part of the encapsulated data file and wherein each parameter comprised in the image description information is associated with additional data which comprise an identifier used to link the image item information to the parameter.
2. The method according to claim 1 , wherein the display parameters comprise one or more parameters among:
image position and size;
pixel aspect ratio,
color information, and
the transformation operators comprise one or more transformation operators among:
cropping,
rotation.
3. The method according to claim 1 , wherein each parameter comprised in the image description information is associated with additional data which comprises:
type information, and/or
an identifier used to link an image item information to the said parameter.
4. The method according to claim 1 , wherein metadata part is included in an ISOBMFF's ‘meta’ box.
5. The method according to claim 1 , wherein each transformation operator comprised in the image description information is associated with additional data which comprises an identifier used to link a transformed item to the transformation operator.
6. The method according to claim 1 , wherein a box stored in the metadata part includes at least one transformation operator and/or at least one display parameter.
7. The method according to claim 1 , further comprising providing a derived image definition for obtaining a derived image item by the composition of one or more image items, the derived image definition being stored in the data part and the derived image item being stored in the metadata part.
8. A method of processing an encapsulated data file comprising a data part and a metadata part, including an encoded bitstream corresponding to one or more images in the data part, and, in the metadata part, image item information identifying a portion of the data part representing a single image or a sub-image of a single image and information included in image or sub-image description information comprising parameters including display parameters and transformation operators relating to one or more image or sub-images, the method comprising:
selecting an image or a sub-image of interest,
identifying, from the selected image or sub-image description information, associated display parameters and/or transformation operators from the meta data part;
applying the identified transformation operators to the image or sub-image, and displaying the image or sub image eventually transformed, according to the display parameters,
wherein each parameter comprised in the image description information is associated with additional data which comprise an identifier used to link the image item information to the parameter.
9. The method according to claim 8 , wherein the method further comprising prior to the identifying step, retrieving additional data comprised in the parameters, the additional data comprising:
type information, and/or
an identifier used to link an image or sub-image item information to the parameter.
10. A server device for encapsulating an encoded bitstream representing one or more images, configured to implement a method according to claim 1 .
11. A client device for processing an encoded bitstream representing one or more images, configured to implement a method according to claim 8 .
12. A non-transitory computer-readable storage medium storing instructions of a computer program for executing the method of claim 1 .
13. The method according to claim 1 , wherein metadata part is included in an ISOBMFF's ‘meta’ box.
14. The method according to claim 8 , wherein metadata part is included in an ISOBMFF's ‘meta’ box.