Image compression method and device

A compression method and image compression technology, which is applied in the field of communication, can solve the problems of low visual quality, failure to consider the visual characteristics of the human eye, inconsistent visual quality of pixel quality images, etc.

Active Publication Date: 2016-07-20
ZTE CORP
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  • Claims
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Problems solved by technology

However, the image quality evaluation methods used in these methods do not take into account the visual characteristics of the human eye, and the pixel quality of the actual image after image compression is incons...

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  • Image compression method and device

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Embodiment Construction

[0023] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0024] In this embodiment, an online examination management method is provided, figure 1 is a flow chart of a picture compression method according to an embodiment of the present invention, such as figure 1 As shown, the process includes the following steps:

[0025] Step S102, obtaining the initial quality factor of the input image;

[0026] Step S104, performing recompression processing on the input image according to the initial quality factor and the preset minimum quality factor, and calculating an objective quality evaluation score of the input image after recompression processing;

[0027] Step S106, the quality factor of the input image is adaptively adjusted according to the preset rules ...

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Abstract

The invention discloses an image compression method and device. The method comprises the following steps of adopting an initial quality factor for obtaining an input image; computing an objective quality assessment score of the input image after double compression processing according to the initial quality factor and a preset minimum quality factor; carrying out adaptive adjustment on the quality factor of the input image according to the objective quality assessment score, a preset objective quality assessment score of the image, which is corresponding to the type of the input image, and a preset rule, stopping a compression process until the objective quality assessment score for image compression meets a preset threshold range, and computing to obtain a first quality factor; carrying out fine tuning on the first quality factor according to subjective image quality factor priori knowledge obtained based on mass data knowledge, and determining a second quality factor; and carrying out compression processing on the input image according to the first quality factor and the second quality factor. According to the image compression method and device, a problem that the visual quality effect is low when the image compression rate is higher, and the visual quality effect for image compression is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a picture compression method and device. Background technique [0002] With the development of network and multimedia technology, the continuous enrichment and development of various terminal applications such as computers and mobile phones has made the proportion of static images in these applications continue to increase. Followed by more and more frequent use of image communication, a large amount of image information not only brings better experience to users, but also increases the challenge to the load capacity of network transmission bandwidth. At the same time, due to the gradual promotion of applications to multiple screens, different screens have different requirements for the browsing experience of pictures, and issues such as multi-resolution storage, display, and efficient compression of pictures need to be considered. On the other hand, people's requirements for t...

Claims

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Application Information

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IPC IPC(8): H04N19/42H04N19/154
CPCG06T7/00G06T9/00H04N1/41
Inventor 刘明马利庄贾霞朱恒亮董振江邹盼盼
Owner ZTE CORP
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