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Image boundary search method and device

A boundary position and boundary technology, applied in the field of image processing, can solve the problem of low image boundary recognition accuracy, achieve the effect of improving search accuracy and search speed, small calculation amount, and large information granularity

Active Publication Date: 2018-07-03
SHENZHEN YIHUA COMP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an image boundary search method and device to solve the problem of low image boundary recognition accuracy in the prior art

Method used

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  • Image boundary search method and device

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Experimental program
Comparison scheme
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Embodiment 1

[0035] figure 1 It is a flow chart of an image boundary search method provided by Embodiment 1 of the present invention. This embodiment is applicable to search for the upper or lower boundary of an image. The method can be executed by an image boundary search device, which can use software and / or hardware implementation.

[0036] The method of Embodiment 1 of the present invention specifically includes:

[0037] S101. Perform binarization on the target image to obtain a binarized target image.

[0038] Specifically, image binarization is also referred to as image black-and-white. The gray value of a pixel on the image is set to 0 or 255, and the entire image presents an obvious black-and-white effect. Wherein, a grayscale value of 0 represents black, and a grayscale value of 255 represents white. In this embodiment, the target image is binarized by using the maximum inter-class variance method (OTSU algorithm) or the P parameter method to obtain a binarized target image. ...

Embodiment 2

[0048] Figure 2A It is a flow chart of a method for searching the upper boundary of an image in Embodiment 2 of the present invention. Embodiment 2 is further described on the basis of Embodiment 1 by taking the upper boundary of a target image as an example. Such as Figure 2A As shown, the method of the second embodiment of the present invention specifically includes:

[0049] S201. Perform binarization on the target image to obtain a binarized target image.

[0050]S202. Acquire a column boundary point array of the binarized target image, wherein each value in the column boundary point array corresponds to the position of the upper boundary point of each column in each column in the binarized target image.

[0051] Preferably, for each column in the binarized target image, a point that satisfies the upper boundary point condition is searched column by column from top to bottom as the upper boundary point;

[0052] The position of the upper dividing point in each column ...

Embodiment 3

[0066] image 3 It is a flow chart of a method for searching the lower boundary of an image provided by Embodiment 3 of the present invention. On the basis of Embodiment 1, Embodiment 3 is further described by taking the lower boundary of a target image as an example. Such as image 3 As shown, the method of the third embodiment of the present invention specifically includes:

[0067] S301. Perform binarization on the target image to obtain a binarized target image.

[0068] S302. Acquire a column boundary point array of the binarized target image, wherein each value in the column boundary point array corresponds to a position of a lower boundary point of each column in each column in the binarized target image.

[0069] Preferably, for each column in the binarized target image, a point satisfying the lower boundary point condition is searched column by column from bottom to top as the lower boundary point;

[0070] The position of the lower dividing point in each column is...

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Abstract

An embodiment of the invention discloses an image boundary search method and device. The method comprises the following steps: carrying out binarization on a target image to obtain a binary target image; obtaining a column boundary point array of the binary target image, wherein each item of data in the column boundary point array represents an upper boundary point of each column or the position of a lower boundary point in each column in the binary target image; ranking each item of data in the column boundary point array according to magnitude to obtain a column boundary point sequence array; and obtaining the value of an array item in the preset position in the column boundary point sequence array as a boundary position, and serving a corresponding row of the boundary position in the binary target image as an upper boundary or a lower boundary of the target image. The method and device can fully obtain boundary information of the target image characteristic region, can eliminate noise interference, are small in operation amount and improve image boundary search precision and speed.

Description

technical field [0001] Embodiments of the present invention relate to image processing technologies, and in particular to an image boundary search method and device. Background technique [0002] The boundary of an image refers to the part of the image where the local intensity changes most significantly. As a basic feature of an image, the boundary is an important basis for image analysis such as image segmentation, texture features, and shape features, and is very important in the field of image processing. [0003] In the prior art, the mutation of the row sum or column sum in the image is usually used to find the image boundary, and the row sum or column sum has a large granularity as statistical information, which reflects the detailed information of the image. Therefore, this method is used to identify The image boundary is easily affected by image noise, and the recognition accuracy is low. Contents of the invention [0004] Embodiments of the present invention pro...

Claims

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Application Information

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IPC IPC(8): G06T7/13G06T7/11G06T7/194
Inventor 李杰
Owner SHENZHEN YIHUA COMP