Unlock instant, AI-driven research and patent intelligence for your innovation.

Goal spot global automatic positioning method

An automatic positioning and target point technology, which is applied in image data processing, measuring devices, instruments, etc., can solve the problems of reducing measurement efficiency, cumbersomeness, and low efficiency of the center coordinates of target points

Inactive Publication Date: 2010-08-18
北京机械工业学院
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional target point positioning method is to obtain the coordinates of each target point in each image one by one, which is a very cumbersome work and greatly reduces the measurement efficiency
[0004] Aiming at the low efficiency of obtaining the center coordinates of the target point in the prior art above, the present invention proposes a global automatic positioning method for the target point that can improve the efficiency and automation of visual measurement

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Goal spot global automatic positioning method
  • Goal spot global automatic positioning method
  • Goal spot global automatic positioning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

[0013] Fig. 1 is a flow chart showing a method for global automatic positioning of target points according to the present invention.

[0014] Referring to FIG. 1 , in step S100 , rough positioning of a target point is performed. That is, the center position of the target point is roughly determined.

[0015] In step S110, the fine positioning of the target point is performed according to the result of the rough positioning of the target point. That is, to accurately determine the center position of the target point.

[0016] After step S110 is executed, the final point data obtained after fine positioning can be saved.

[0017] FIG. 2 is a detailed flow chart showing rough positioning in FIG. 1 .

[0018] Referring to FIG. 2, in step S200, a grayscale image (converted from a captured color image, or a direct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a target point global and automatic location method in photogrammetric image which comprises that: the coarse positioning of a target point is executed to roughly define the central position of the target point; according to the result of the coarse positioning of the target point, the accurate location of the target point is executed to accurately define the central position of the target point. The target point can be white or black. In the coarse positioning, an image-binary threshold is preset according to the highlighting feature of the target point in the image. In the accurate location, the minimum area containing the target point is dynamically defined according to the result of the coarse positioning of the target point. The method can simply obtain image coordinates of all feature points in the image at one time by presetting four parameters, and greatly improves the efficiency and automation degree of visual measurement.

Description

technical field [0001] The invention relates to a method for locating a target point in a photogrammetry image, more specifically, to a method for global automatic positioning of a target point in a photogrammetry image. Background technique [0002] Close-range photogrammetry is a measurement technology that obtains the shape, size and motion state of the target to be measured through photography and subsequent image processing and related technologies of photogrammetry processing. Generally, any object whose image can be captured can be used as the object of close-range photogrammetry. In the specific implementation, it is necessary to take several images from different positions, obtain the image coordinates of the point group on different image planes as the original data, and finally obtain the three-dimensional space coordinates of the target point group according to a certain algorithm. The composition of the point group is by arranging several mark points on the tar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/00G01B11/00G01B11/24G01B11/03G06T7/00
Inventor 吕乃光吴迪邓文怡董明利娄小平
Owner 北京机械工业学院