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Method and device for image compression and decompression

An image compression and image technology, which is applied in image communication, image coding, image data processing, etc., can solve the problems of not being able to make full use of image pixels to repeat by region, image compression, etc., and achieve wide application range, space saving, and large compression than the effect

Active Publication Date: 2015-11-18
NEUSOFT CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ordinary run-length coding cannot make full use of the feature that image pixels repeat by region, and thus cannot effectively compress images.

Method used

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  • Method and device for image compression and decompression
  • Method and device for image compression and decompression
  • Method and device for image compression and decompression

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Embodiment Construction

[0055] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0056] image 3 is a flowchart showing the image compression method according to an embodiment of the present invention, Figure 4-1 to Figure 4-10 It is a group of image model diagrams, showing the changes of compressed pixels and uncompressed pixels when an image is compressed by the image compression method described in an embodiment of the present invention. Below to Figure 4-1 to Figure 4-10 For example, combine image 3 A flow chart is used to illustrate the image compression method according to an embodiment of the present invention.

[0057] Suc...

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Abstract

The invention provides an image compressing method and a device and a relative image uncompressing method and a device. The image compressing method comprises a plurality of rounds of compressing circulation, in each round of compressing circulation, firstly ascertaining pixel lines which a current uncompressing pixel quantity is largest and a line number is smallest and recording the a pixel value of a first uncompressed pixel P of the pixel lines in n pixel lines of images. Further, respectively ascertaining and recording a number N of the current uncompressed pixels which have the same pixel values with the pixel P, counted form the current first uncompressed pixel and arranged continuously in the pixel lines which the pixel P is located and subsequent pixel lines thereof. When a certain subsequent pixel line is judged that the pixel number acquired from the certain subsequent pixel line N is equal to zero, or when a certain subsequent pixel line is the end pixel line, the round of compressing circulation is over. An average compression ratio acquired from the method is about 40%, and excessive central processing unit (CPU) resources are not consumed, and so that the image compressing and uncompressing method is wide is application range.

Description

technical field [0001] The invention belongs to the field of image compression, and in particular relates to an image compression and decompression method and device. Background technique [0002] With the popularity of smart phones, smart phones have become a necessity in people's lives. It can be seen from its development trend that the computing power of smart phones is getting stronger and stronger, and the network connection speed is getting faster and faster. At the same time, cars, which are closely related to people's lives, are far less intelligent than smartphones. In this case, one way to make up for this imbalance is to connect the vehicle-mounted terminal and the smartphone. figure 1 is a schematic diagram showing how the vehicle-mounted terminal and the smartphone cooperate. Such as figure 1 As shown, the user controls the smartphone by operating the vehicle-mounted terminal, and to a certain extent, the images and sounds contained in the content and softwa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/42H04N19/423G06T9/00H04N19/533
Inventor 聂山人张骞杨明张翼刘婕妤毛泳江
Owner NEUSOFT CORP
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