A method and device for enlarging local area images

A technology for magnifying images and local areas, applied in the field of communications, and can solve problems such as poor magnification effect

Inactive Publication Date: 2011-12-28
NEW H3C TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, digital amplification is to be processed on the existing live image. When the live image is sent to the client by the encoder, image compression (such as image change information reduction, color information distortion) has been performed. After that, the client compresses the image. After the image is enlarged and displayed, the zoom effect is not good

Method used

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  • A method and device for enlarging local area images
  • A method and device for enlarging local area images
  • A method and device for enlarging local area images

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Embodiment Construction

[0070] Firstly, the following features are clarified: (1) The image is collected, which is the image collected by the encoding device. (2) The global image is a reduced image based on the collected image, and its content is the same as that of the collected image, but the size is different from that of the collected image. (3) The enlarged image is an enlarged image based on a certain area to be enlarged in the collected image, and is obtained by enlarging the image in the area to be enlarged in the collected image.

[0071] Aiming at the problems existing in the prior art, the present invention proposes a method for enlarging local area images, which is applied to a monitoring system including encoding devices (such as encoders, etc.) and clients (such as VCs, etc.), such as figure 1 As shown, the method includes the following steps:

[0072]In step 101, the client sends an image enlargement request to the encoding device. The image enlargement request carries the position i...

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Abstract

The invention discloses a method and device for enlarging a partial area image, the method comprising: an encoding device receives an image enlarging request from a client, the image enlarging request carries position information of the area to be enlarging in the collected image; the encoding The device determines the position of the region to be enlarged in the captured image according to the position information; the encoding device performs zoom processing on the captured image at the position to obtain an enlarged image; and performs shrink processing on the collected image to obtain a global Figure; the coding device sends the global picture and the enlarged image to the client. In the present invention, the loss of image information can be reduced, so that the enlarged image displayed by the client terminal is clearer.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for enlarging local area images. Background technique [0002] In the field of video surveillance, it is often necessary to enlarge low-resolution images into high-resolution images. The current monitoring system provides two image enlargement functions for live events: (1) physical enlargement, which can be realized by adjusting the optical parameters through the pan / tilt. Physical magnification. (2) Digital magnification, the encoder sends the image to the client, and the client processes the image to realize digital magnification. [0003] In the prior art, the implementation process of digital magnification includes: through the client, the user draws a frame on the part of the image that needs to be enlarged as a selection area, and the client magnifies the live image of the selected area. [0004] However, digital amplification is to be ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18G06T3/40
Inventor 黄军
Owner NEW H3C TECH CO LTD
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