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Distinguishability self-adapting node tree encoding method of JPEG (joint photographic experts group) 2000

An encoding method and node tree technology, applied in the field of image processing, can solve problems such as large clock resources, and achieve the effects of high encoding efficiency, fast encoding speed, and wide application range

Inactive Publication Date: 2012-10-10
XIDIAN UNIV
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Problems solved by technology

However, the disadvantage of this method is that when coding, the patent uses the method of marking whether the node has been coded, and generates coded streams by level-by-level comparison, which will consume a lot of clock resources

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  • Distinguishability self-adapting node tree encoding method of JPEG (joint photographic experts group) 2000
  • Distinguishability self-adapting node tree encoding method of JPEG (joint photographic experts group) 2000
  • Distinguishability self-adapting node tree encoding method of JPEG (joint photographic experts group) 2000

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Embodiment Construction

[0053] Attached below figure 1 The implementation steps of the present invention are described in detail.

[0054] Step 1. The user inputs the encoding parameters to the output node information module according to the project requirements. The encoding parameters include wavelet transform series, image width, and image height.

[0055] Step 2, output node information

[0056] 2a) Determine whether the image width of the coding parameters in the output node information module exceeds the maximum image width of 2048 to 4096 pixels allowed by the project. If it exceeds, set the node width and height in the image to 64 pixels and 16 pixels respectively pixels; otherwise, set the width and height of nodes in the image to 32 pixels.

[0057] In a specific embodiment of the present invention, considering the size of the memory capacity, the maximum image width is set to 2048-4096 pixels. In practical application, the present invention does not limit the width of the image. The wi...

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Abstract

The invention discloses a distinguishability self-adapting node tree encoding method of a JPEG (joint photographic experts group) 2000. The distinguishability self-adapting node tree encoding method comprises the following steps of: (1) inputting a coding parameter; (2) outputting coding block information; (3) controlling circulation; (4) depositing node information of all levels of the current sub belts; (5) judging whether the current sub belt contribution finishes; (6) carrying out current contribution; (7) carrying out current sub belt coding; and (8) storing a code result after separation. The encoding method provided by the invention can carry out compressed encoding of a distinguishability image at will in a certain scale in a self-adapting manner, and uses each level father node sole stored manner in a contribution manner; and a coordinate value of a leaf node during encoding is utilized to calculate the stage number when initiating encoding, an address calculation method is simplified, the defects that a clock resource is wasted because whether a labeling node is encoded are overcome, and the coding efficiency is improved. The distinguishability self-adapting node tree encoding method provided by the invention is used for compressed encoding of different digital image chips.

Description

technical field [0001] The invention belongs to the technical field of image processing, and further relates to a resolution self-adaptive node tree (Tag-tree) encoding method conforming to the JPEG2000 standard. The present invention uses the Tag-tree coding method containing information in the JPEG2000 standard to code any resolution image. The invention can be used for compression coding of various digital image chips. Background technique [0002] JPEG2000, as a new generation static compression coding standard, has been widely used in Internet, image transmission and other fields. It adopts the multi-analysis encoding method based on wavelet transform. Compared with the currently widely used multilevel tree set splitting algorithm (SPIHT), this coding system can provide good rate-distortion characteristics and subjective visual quality when compressing at very low bit rates. In addition, this system has a series of other Benefits and features. It adopts discrete wav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/30H04N19/102H04N19/63H04N19/70
Inventor 李云松雷杰姚银琪李志彦刘凯王柯俨宋长贺
Owner XIDIAN UNIV
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