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A codec method, device and electronic equipment

A technology of encoding method and decoding method, which is applied in the fields of encoding and decoding methods, devices and electronic equipment, and can solve problems such as low compression efficiency

Active Publication Date: 2021-03-26
BEIJING QIYI CENTURY SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the above-mentioned bit-plane encoding method is a pixel-by-pixel encoding method, the compression efficiency of the existing encoding method is relatively low

Method used

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  • A codec method, device and electronic equipment
  • A codec method, device and electronic equipment
  • A codec method, device and electronic equipment

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Embodiment Construction

[0080] The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

[0081] In order to solve the problem of low compression efficiency when encoding planar curves in images, embodiments of the present invention provide a codec method, device, and electronic equipment to improve the compression efficiency of encoding planar curves in images.

[0082] Firstly, the encoding method provided by the embodiment of the present invention will be described in detail below.

[0083] see figure 2 , figure 2 It is a flowchart of an encoding method according to an embodiment of the present invention, including the following steps:

[0084] S201. For each planar curve in the acquired image, obtain a plurality of position coordinates of the planar curve, and according to the starting sequence of the planar curve, separately perform the X-axis coordinates in the plurality of positio...

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Abstract

Embodiments of the invention provide a coding method and device, a decoding method and device, and an electronic device that are applied in the technical field of image coding and decoding. The codingmethod comprises the steps of acquiring multiple position coordinates of each plane curve in an image, and building arrays for X-axis coordinates and Y-axis coordinates in the multiple position coordinates according to a starting order of the plane curves, so as to obtain two arrays; if the length of each array is greater than a preset first length threshold, splitting the array into multiple sub-arrays according to a sequence of elements in the array; performing DCT transform and quantization on each sub-array of the multiple sub-arrays, so as to obtain quantified sub-arrays, and coding thelength of the sub-array and the quantified sub-array; and after coding the length of each sub-array and the sub-array in each of the two arrays, obtaining a code stream of the plane curve. The methodimproves coding compression efficiency.

Description

technical field [0001] The present invention relates to the technical field of image encoding and decoding, in particular to an encoding and decoding method, device and electronic equipment. Background technique [0002] In the image coding and decoding technology, it is usually necessary to encode the planar curve in the image, such as figure 1 The image shown is a binary image composed of a large number of curves, and its pixel values ​​can be represented by 0 and 1. The usual encoding method is bit-plane encoding, in which bit-plane encoding is a method of decomposing an image containing multiple gray values ​​into a series of binary images, and then compressing each binary image with a binary compression method Technology. Wherein, the bit-plane encoding method includes: bit-plane decomposition and bit-plane encoding. For example, in the binary image coding method defined by the JBIG organization, for each pixel in a binary image, first, a set of encoded pixels adjace...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/625H04N19/124
CPCH04N19/124H04N19/625
Inventor 朱洪波
Owner BEIJING QIYI CENTURY SCI & TECH CO LTD
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