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Encoding mark based on colors and structural features

A technology of coded marks and structural features, which is applied in the field of coded marks, can solve the problems of difficult recognition of coded marks and low recognition rate, and achieve clear effects, simplified decoding steps, and clear geometric centers

Inactive Publication Date: 2013-04-10
THE PLA INFORMATION ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a coded mark based on color and structural features to solve the problems of difficult identification and low recognition rate of existing coded marks

Method used

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  • Encoding mark based on colors and structural features
  • Encoding mark based on colors and structural features
  • Encoding mark based on colors and structural features

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0024] Color-coded signs require the application of multiple colors, and in order to improve the efficiency of color recognition, it is necessary to enhance the contrast between different colors. In the color space, red, green and blue are usually referred to as three primary colors, which can synthesize most colors in nature, such as Figure 4 Adding red and green makes yellow, adding green and blue makes turquoise, adding red and blue makes magenta, and adding red, blue and green makes white.

[0025] Use 0-255 to represent the brightness value of the RGB grayscale. Each color can be represented by a three-dimensional array. For example, the three elements in (255, 0, 0) correspond to RGB respectively, and the color represented is red. Therefore, to If you want to determine which color a certain pixel belongs to, you can judge the pixel color according to ...

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Abstract

The invention relates to an encoding mark based on colors and structural features. Four template points and two encoding points with different colors are arranged on a substrate; coordinates of the template points are known; three of the template points are positioned on an X axis, a Y axis and an origin of a coordinate system respectively; the last template point is positioned at the center of the encoding mark; the two encoding points are positioned at any two encoding point positions of a group of encoding point positions in the encoding mark; coordinates of the encoding point positions are fixed and are numerically numbered in sequence; the template points and the encoding points are red, green, blue, white, red violet, yellow, and dark green; ground colors of the template points and the encoding points are black; and the template points and the encoding points are circular. The problems that the existing encoding marks are difficult to identify and the identification rate is low are solved.

Description

technical field [0001] The invention relates to a coded mark based on color and structural features. Background technique [0002] At present, in the field of industrial digital photogrammetry, artificial markers are usually used as feature points. On the one hand, artificial markers can make up for the single defect of the surface texture of the target object; measurement effect. In order to measure the surface shape of the target object more precisely, a large number of artificial marks are often pasted, and the number even reaches as many as a thousand. If a manual method is used to determine the image points of the same name in multiple images, it will not only be time-consuming and laborious but also increase the error rate. [0003] In order to automate the processing of industrial digital photogrammetry, coded flags have been introduced. A coded mark is an artificial mark with certain coded information, and the information of each coded mark is unique. [0004] Su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/00
Inventor 徐青王栋邢帅蓝朝桢李建胜周杨何钰施群山耿迅侯一凡陈永枫李鹏程
Owner THE PLA INFORMATION ENG UNIV
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