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Image compression method and image compression device

A technology for image compression and image scanning, which is applied in the field of image processing, can solve the problem of not considering the symmetry of characters, etc., and achieve the effect of reducing the number and data volume

Inactive Publication Date: 2016-01-13
FUJITSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, whether it is lossless data compression or lossy data compression, the current image compression methods do not take into account the symmetry characteristics of characters.

Method used

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  • Image compression method and image compression device

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Embodiment Construction

[0019] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described here, therefore, the present invention is not limited to the specific embodiments disclosed below limit.

[0021] figure 1 A schematic flowchart of an image compression method according to an embodiment of the present invention is shown.

[0022] Such as figure 1 As shown, the image compression method according to an embodiment of the presen...

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Abstract

The invention provides an image compression method and an image compression device. The image compression method comprises the steps of scanning each pixel in an image coding unit, and acquiring a plurality of pixel sets; distributing a unique index value for a gray value set of each pixel set, and generating an index table, wherein two pixel sets with a symmetry characteristic are identical in index value, and identification information is added to the two pixel sets with the symmetry characteristic so as to differentiate pixel sets with a forward order or a reverse order; and carrying out entropy coding on the coding unit according to the index value of each pixel set in the index table and the image coding unit, wherein if the reverse order of M continuous pixels is matched with other M continuous pixels, the M continuous pixels and the other M continuous pixels are determined to have the symmetry characteristic. The technical scheme provided by the invention utilizes the symmetry characteristics of characters in coding, thereby being capable of reducing the amount of data for expressing an image, reducing the space occupation of data, and improving the data transmission efficiency.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular, to an image compression method and an image compression device. Background technique [0002] Image compression is used to reduce the amount of data required to represent digital images. The reason why images can be compressed is because there is redundancy in the data. The purpose of data compression is to reduce the number of bits required to represent data by removing these data redundancies. . Due to the huge amount of image data, it is more difficult to store, transmit, and process, so image data compression is very important. Image compression can be either lossy or lossless data compression. However, whether it is lossless data compression or lossy data compression, the current image compression methods do not take into account the symmetry characteristics of characters. Contents of the invention [0003] In view of this, the present invention proposes ...

Claims

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Application Information

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IPC IPC(8): H04N19/13H04N19/189H04N19/129
Inventor 叶姜莉付轩
Owner FUJITSU LTD