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Convex polygonal image block detection method, device and equipment

A technology of convex polygon and detection method, which is applied in the computer field and can solve problems such as detecting convex polygon image blocks

Active Publication Date: 2015-06-24
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no method to detect convex polygon image patches from the image

Method used

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  • Convex polygonal image block detection method, device and equipment
  • Convex polygonal image block detection method, device and equipment
  • Convex polygonal image block detection method, device and equipment

Examples

Experimental program
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Embodiment 1

[0061] see figure 1 , an embodiment of the present invention provides a method for detecting a convex polygon image block, including:

[0062] Step 101: acquiring an image collected by an image sensor;

[0063] Step 102: Obtain a corner point set, where the corner point set includes a corner point in the image, and the corner point is the intersection of any two non-parallel straight lines in the image;

[0064] Step 103: According to the set of corner points, obtain from the image a convex polygonal image block whose shape is a preset shape and whose similarity with the preset image block exceeds a preset first threshold.

[0065] In the embodiment of the present invention, an image collected by an image sensor is obtained, and a corner point set is obtained, where the corner point set includes a corner point in the image, and the corner point is an intersection point where any two non-parallel straight lines in the image intersect; according to For the corner point set, a ...

Embodiment 2

[0067] see Figure 2-1 , an embodiment of the present invention provides a method for detecting a convex polygon image block, including:

[0068] Step 201: acquiring an image captured by an image sensor;

[0069] Step 202: Obtain a set of candidate corner points, where the candidate corner points included in the candidate corner point set are pixels whose corner point response values ​​in the image are greater than a preset second threshold;

[0070] Specifically, it can be achieved through the following steps from 2021 to 2023, including:

[0071] 2021: Acquire the grayscale value of each pixel included in the image;

[0072] 2022: Calculate the corner response value of each pixel respectively according to the acquired gray value of each pixel, the preset first matrix and the preset second matrix;

[0073] Wherein, for any pixel in the image, the following steps (A-1) to (A-8) can be used to calculate the corner response value of the pixel, including:

[0074] (A-1): Obta...

Embodiment 3

[0175] see image 3 , an embodiment of the present invention provides a method for detecting a convex polygon image block, including:

[0176] Step 301: acquiring an image collected by an image sensor;

[0177] Step 302: Obtain a set of candidate corner points, and the candidate corner points included in the candidate corner point set are contour points included in the contour of the connected domain in the image;

[0178] Specifically, the gray value of each pixel in the image is obtained, the obtained gray value is averaged to obtain the average gray value, and the gray value of the pixel whose gray value in the image is greater than or equal to the average gray value is calculated. The value is set as the first gray value, and the gray value of the pixel whose gray value in the image is less than the average recovery value is set as the second gray value; The original image is converted into a black and white image through the above-mentioned conversion process; The conne...

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Abstract

The present invention discloses a method and an apparatus for detecting a convex polygon image block, and a device. The method includes: acquiring an image collected by an image sensor; acquiring a corner set, where the corner set includes a corner in the image, and the corner is an intersection point at which any two straight line sides that are not parallel to each other in the image intersect; and detecting a convex polygon image block in the image according to the corner set, where a shape of the convex polygon image block is a preset shape and a similarity between the convex polygon image block and a preset image block exceeds a preset first threshold. The apparatus includes: a first acquiring module, a second acquiring module, and a detecting module. In the present invention, the convex polygon image block can be detected from the image.

Description

technical field [0001] The present invention relates to the field of computers, in particular to a method, device and equipment for detecting convex polygon image blocks. Background technique [0002] Augmented reality technology is a new technology developed on the basis of virtual reality. It is a technology that increases users' perception of the real world through information provided by computer systems, applies virtual information to the real world, and converts computer-generated virtual objects and scenes. Or virtual information such as system prompts is superimposed on the real scene, so as to realize the enhancement of reality. [0003] Augmented reality technology includes three steps of locating the real scene in the image, generating virtual information and adding the generated virtual information to the located real scene. Among them, when locating the real scene in the image, the convex polygon image block in the image is firstly detected, and the detected co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06V10/44
CPCG06T7/70G06V10/44G06V10/751G06F18/21
Inventor 沈言浩周炯
Owner HUAWEI TECH CO LTD