Image compression method and device
A compression method and image compression technology, applied in the field of communication, can solve the problems of low visual quality effect, not taking into account the visual characteristics of the human eye, inconsistent pixel quality image visual quality effect, etc.
Active Publication Date: 2019-08-06
ZTE CORP
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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 inconsistent with the visual quality of the image.
[0004] Aiming at the problem that the visual quality effect is not high when the image compression rate is high in related technologies, no effective solution has been proposed
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[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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Disclosed are an image compression method and device. An initial quality factor of an input image is acquired; an objective quality score of the input image after double compression processing is calculated according to the initial quality factor and a preset minimum quality factor; adaptive adjustment is performed on a quality factor of the input image according to the objective quality score and an objective quality score of a preset image corresponding to a type of the input image and according to a preset rule, a compression process is stopped until the objective quality score after image compression meets a preset threshold range, and a first quality factor is calculated; fine adjustment is performed on the first quality factor according to subject image quality factor priori knowledge obtained based on massive data knowledge, and a second quality factor is determined; and compression processing is performed on the input image according to the first quality factor and the second quality factor. Therefore, the problem that a visual quality effect is not high when an image compression rate is high is solved, and the visual quality effect of 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...
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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