Decoding method for point-distributed color coding marks
A technology of color coding and decoding method, which is applied in the decoding field of point distribution type color coded signs, can solve the problem of low recognition rate of point distribution type coded marks, achieve the effect of improving the correct rate of recognition and simplifying the decoding steps
Inactive Publication Date: 2015-06-03
THE PLA INFORMATION ENG UNIV
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[0004] The purpose of the present invention is to provide a decoding method for point-distributed color-coded signs to solve the problem that the recognition rate of traditional point-distributed coded signs is not high
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[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] like image 3 and Figure 4 As shown, the color point distribution type coded mark of the present invention is made up of 6 circular mark points with the same shape and different colors, and is divided into 4 template points and 2 code points, wherein the coordinates of the 4 template points are known, image 3 The 16 circular points with numbers are a group of coded points whose coordinates are known, and the 2 template points are located on any two of them.
[0023] The colors of the 6 mark points in the coded mark are selected from red, green, blue, white, red purple, yellow and turquoise, among which, yellow is obtained by superimposing red and green, red and purple is obtained by superimposing red and blue, and cyan is obtained by superimposing blue It is obtained by superimposing with green, and white is obtained by superimposing red, green and...
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The invention relates to a decoding method for point-distributed color coding marks. A base plate of a color coding mark is provided with six different colors of round marking points which are divided into four template points and two coding points, wherein the color of the four template points is fixed, and the coordinate is known; the color of the two coding points are other two kinds of set colors and the two coding points are positioned on the set coding point position. The decoding method comprises the following steps: initially confirming the marking points of the color coding marks through identification of colors and shapes of each graph in a photographic image; identifying out the marking point positioned at a central point of the coding mark; finding out other five marking points by taking the marking point as the center; establishing a radiation transformation model according to the set coordinate of the four template pointss in the coding mark and the actual coordinate of the four template points in the photographic image; resolving corresponding transformation parameters; and calculating the actual coordinate of the coding points, so that the code of the coding mark is obtained, the decoding steps are simplified, and the accuracy of identifying the color coding marks is improved.
Description
technical field [0001] The invention relates to a decoding method of a dot-distributed color-coded sign. Background technique [0002] The point distribution coding mark is a common coding mark, which has been playing an important role in the automatic processing of close-range photogrammetry, such as figure 1 and figure 2 , the traditional gray point distribution coded mark is composed of 8 white circular mark points with the same shape, which can be divided into template points and code points. Because there are no obvious features between the circular marker points, they can only be distinguished by solving the relationship between them, and then it can be decoded according to the corresponding rules. However, in the actual application process, due to the relatively large inclination angle of the photo, the camera itself also has a certain distortion, which will make the relationship between the points in the coded mark not stable enough, and thus lead to the inability...
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IPC IPC(8): G06K7/10
Inventor 王栋邢帅徐青侯一凡孙伟郭海涛张衡卢俊吕亮施群山耿迅李鹏程张昊
Owner THE PLA INFORMATION ENG UNIV