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Image compression method and device

An image compression and image technology, which is applied in the field of image processing, can solve problems such as the compression method cannot be compressed

Active Publication Date: 2020-12-22
HANGZHOU HIKVISION DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, this application provides an image compression method and device to solve the problem that the currently used compression methods cannot be compressed according to actual scene changes

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  • Image compression method and device
  • Image compression method and device

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Embodiment Construction

[0025] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0026] The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application. As used in this application and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term...

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Abstract

The invention provides an image compression method. The method comprises the steps of: obtaining an ROI area from an original image, compressing a non-ROI area in the original image according to a first compression level, and determining the compressed non-ROI area and the area, except the non-ROI area, in the original image as a first image; compressing the first image according to the second compression level to obtain a second image; and if the difference value between the second image size M and the preset target value N is not in the preset range, selecting a compression level to be adjusted from the first compression level and the second compression level according to the M and the N, and adjusting the selected compression level. The non-ROI area is compressed by using the first compression level, so that the size of the non-ROI area is reduced, the definition of the ROI area is reserved, and then the whole image is compressed by using the second compression level to obtain the image size meeting the requirement. The size of the compressed image is always kept in a range meeting the requirement by dynamically adjusting the compression level.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to an image compression method and device. Background technique [0002] In the traffic monitoring industry, in order to save storage space and improve data transmission efficiency, it is a key step before storage and transmission to compress and encode the original image collected by the surveillance camera to reduce the image size (the storage space occupied by the image). [0003] At present, the collected original images are only stored and transmitted after being compressed and encoded with a fixed compression rate. However, this compression method is suitable for fixed scenes. For surveillance scenes with dynamically changing targets (such as vehicles, people, etc.) The size of the image varies greatly. If the original image is always compressed and encoded with a fixed compression rate, the size of the stored and transmitted image will also vary greatly, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/167H04N19/85
CPCH04N19/167H04N19/85
Inventor 陈鑫
Owner HANGZHOU HIKVISION DIGITAL TECH
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