Prediction of images by prior determination of a family of reference pixels, coding and decoding using such a prediction
AssigneeOrange
InventorsJoël Jung, Guillaume Laroche
Life of this patent
Estimating the term…
Abstract
A method is provided for predicting partitions of at least one group of pixels in an image to be coded, with respect to a group of reference pixels. Accordingly, the group of reference pixels is obtained by calculating a function characteristic of a predetermined mode of prediction, the reference pixels of the group obtained being variable from one partition to another.
Claims24
A method for predicting pixels in an image to be coded with an image coder comprising the steps of:
- selecting sets of reference pixels;
- determining distances from a current pixel of a group of current pixels to each pixel of the sets of reference pixels, respectively;
- selecting a group of reference pixels for the current pixel using a predetermined prediction mode, wherein the group of reference pixels is located in the sets and is closest to the current pixel;
- predicting the current pixel based on the reference pixel which, out of the group of reference pixels, is closest to the current pixel.
A method for predicting pixels in an image to be decoded with an image decoder comprising the steps of:
- selecting sets of reference pixels;
- determining distances from a current pixel of a group of current pixels to each pixel of the sets of reference pixels, respectively;
- selecting a group of reference pixels for the current pixel using a predetermined prediction mode, wherein the group of reference pixels is located in the sets and is closest to the current pixel;
- predicting the current pixel based on the reference pixel which, out of the group of reference pixels, is closest to the current pixel.
A method for predicting pixels in an image to be decoded with an image decoder comprising the steps of:
- selecting sets of reference pixels;
- determining distances from a current pixel of a group of current pixels to each pixel of the sets of reference pixels, respectively;
- selecting a group of reference pixels for the current pixel using a predetermined prediction mode, wherein the group of reference pixels is located in the sets and is closest to the current pixel;
- predicting the current pixel based on at least one pixel of the group of reference pixels, the at least one pixel being located in a predetermined direction of prediction.
A method for predicting pixels in an image to be decoded-with an image decoder comprising the steps of:
- selecting sets of reference pixels;
- determining distances from a current pixel of a group of current pixels to each pixel of the sets of reference pixels, respectively;
- selecting a group of reference pixels for the current pixel using a predetermined prediction mode, the group of references pixels including a first reference pixel and a second reference pixel, wherein the group of reference pixels is located in the sets and is closest to the current pixel,
- wherein the first reference pixel is located in a first predetermined direction of prediction and the second reference pixel is located in a second predetermined direction of prediction, the first and second predetermined directions being different from one another;
- predicting the current pixel based on the first and second reference pixels.
Dependencies are inferred from the claim text.