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Method for extracting target area

A technology of object area and reference area, applied in color TV parts, TV system parts, image enhancement and other directions, can solve the problems of correcting inaccurate boundaries, error area expansion, inaccurate boundaries, etc.

Inactive Publication Date: 2003-04-16
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But when the object area is moving fast, you get imprecise boundaries
In this case, fix the imprecise bounds
As discussed earlier, due to the noise of the image, existing methods cannot extend the region to the desired boundary, or wrongly extend the region to the non-object area

Method used

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  • Method for extracting target area
  • Method for extracting target area
  • Method for extracting target area

Examples

Experimental program
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Embodiment Construction

[0042] Detailed Description of Preferred Embodiments

[0043] The method for extracting an object region according to a preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] figure 1 Shown is a flow chart of the process of extracting object regions according to the present invention. refer to figure 1 , the method for extracting the object region includes: detecting the edge pixels closest to the border pixels of the reference region, modifying the border of the reference region (step 100), extending the region within a predetermined range of the modified border pixels of the reference region, and using the color similarity On the one hand, the area is compared with the surrounding areas, and the revised boundary of the reference area is corrected (step 200).

[0045] Refer to the following figure 2 Step 100 of the method for extracting object regions is described in detail.

[0046] figure...

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Abstract

The present invention discloses a method for extracting an object region, which can precisely modify a boundary of a roughly extracted object region (reference region). The boundary of the reference region can be modified by detecting edge pixels nearest to the boundary pixel of the reference region. Thereafter, an expanded region is designated from the modified reference region, and a surrounding region having the smallest color difference is selected by using color differences between the expanded region and the surrounding regions. At last, the modified boundary of the reference region is modified by using distribution of interest region included in the selected surrounding region. As a result, the object region can be more precisely extracted by preventing confusion of the boundary by modifying the reference region twice.

Description

technical field [0001] The present invention relates to a method for extracting an object area in a moving image, in particular to an improved method for extracting an object area, which can accurately extract the object area of ​​a current frame by thinning the boundary of an assumed object area. Background technique [0002] Recently, techniques for extracting or tracking object regions from images have been in the spotlight due to their increasing importance. In particular, MPEG-4 for object-based compression and encoding has been standardized to introduce various object region extraction algorithms. In addition, a method for manually extracting a hypothetical area and automatically extracting an accurate object area has been actively studied to overcome the difficulty of object extraction, realize practical use and demonstrate an object-based application example. In image communication, methods for extracting precise object regions from assumed object regions are useful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24G06T5/00
CPCG06T2207/10016H04N19/00387H04N7/26638G06T7/2006H04N7/26882G06T7/0083G06T2207/20144H04N19/00903H04N19/20H04N19/85G06T7/12G06T7/215G06T7/194G06T7/00
Inventor 李振秀柳在信
Owner LG ELECTRONICS INC