US 2026/0075210 A1 · Image Coding Method and Apparatus

Abstract

An image encoding method includes an encoding device that classifies sub-images of a to-be-encoded image based on feature values of the sub-images. Different sub-images have different feature values, and after matching the sub-images with encoded sub-images in a buffered queue, a matched sub-image and an unmatched sub-image may be determined. Therefore, image encoding data of a sub-image that is in a previous frame of image and that is the same as the matched sub-image in the to-be-encoded image can be reused only when the matched sub-image in the to-be-encoded image and the sub-image in the previous frame of image do not need to have a same location and same content. Further, in a process of encoding the to-be-encoded image, encoding (for example, standard encoding) is performed on the unmatched sub-image, and information about the matched encoded sub-image is generated for the matched sub-image.

Claims20

Dependent claims

A method comprising:

obtaining a first image comprising first-type sub-images and/or second-type sub-images, wherein a size of each of the first-type sub-images and/or the second-type sub-images is based on a first matching status of a first feature value of an encoded sub-image, wherein the first image and a second image to which the encoded sub-image belongs are part of a same image sequence, wherein second feature values of the first-type sub-images match the first feature value, and wherein third feature values of the second-type sub-images do not match the first feature value;
updating first original pixel values of the first-type sub-images to obtain updated first-type sub-images;
and
encoding the updated first-type sub-images and the second-type sub-images to obtain a bitstream.

1 more element

A coding system, comprising:

an encoding device configured to:
obtain a first image comprising first-type sub-images and/or second-type sub-images, wherein a size of each of the first-type sub-images and/or the second-type sub-images is based on a first matching status of a first feature value of an encoded sub-image, wherein the first image and a second image to which the encoded sub-image belongs are part of a same image sequence, wherein second feature values of the first-type sub-images match the first feature value, and wherein third feature values of the second-type sub-images do not match the first feature value;
update first original pixel values of the first-type sub-images to obtain updated first-type sub-images;
and
encode the updated first-type sub-images and the second-type sub-images to obtain a bitstream;
and
a decoding device configured to:
obtain the bitstream of at least one image frame;
obtain a second image based on the bitstream, wherein the second image comprises third-type sub-images and/or fourth-type sub-images, wherein a size of each of the third-type sub-images and/or the fourth-type sub-images is based on a second matching status of a fourth feature value of a decoded sub-image, wherein the second image and a third image to which the decoded sub-image belongs are part of a same image sequence, wherein fifth feature values of the third-type sub-images match the fourth feature value, and wherein sixth feature values of the fourth-type sub-images do not match the fourth feature value;
and
restore, based on the fourth feature value, an image area corresponding to the third-type sub-images to obtain a reconstructed image.

8 more elements

Dependencies are inferred from the claim text.

Image Coding Method and Apparatus

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Image Coding Method and Apparatus

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Abstract

Claims20