Bar code for digital level bar code ruler and electronic theodolite dial and encoding and decoding method therefor
A technology of electronic theodolite and digital level, which is applied in the direction of measuring ruler, movable mark, measuring point mark, etc. It can solve the problems of complex barcode, difficult making of ruler, and slow measurement speed.
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[0017] specific implementation
[0018] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0019] The symbol and barcode structure of an embodiment of the present invention are as figure 1 shown.
[0020] 1. Code unit: each code unit is composed of a pair of light and dark stripes, the order of light and dark is consistent, and the width of each code unit is the same—that is, the width of the bright stripe plus the width of the dark stripe is equal to a fixed value; the bright in this embodiment is white , dark is black, but light and dark refer to the meaning of optical brightness contrast, not only white and black, but also other color configurations with light and dark differences in brightness, such as light yellow and dark blue.
[0021] 2. Proportional code: The code elements with different duty ratios are called proportional codes, and the coding is realized by the ratio of the width of the light and dark stripes i...
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