Pseudorandom bar code applied to digital level bar code ruler
A technology of digital level and bar code ruler, which is applied in the direction of measuring scale, movable mark, measuring point mark, etc., can solve the problems of inability to realize productization and limit the acquisition of theoretical achievements, and achieve the purpose of expanding the scope, increasing the amount of information, and reducing the field of view The effect of scope requirements
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[0022] The working principle of the present invention will be further described below in conjunction with the drawings and embodiments.
[0023] 1. Stripes: Stripes are the carrier of pseudo-random sequences, which have two basic characteristics, namely lightness and width. In the present invention, only two kinds of brightness stripes are used, that is, bright stripes and dark stripes. In this embodiment, bright is white and dark is black, but light and dark refer to the contrast meaning of optical brightness, which is not limited to white and black. Contains other color schemes that vary in brightness, such as black and yellow. When the width of the stripes is modulated by a pseudo-random sequence, any combination of widths can reflect the law of the pseudo-random sequence. The embodiment of the present invention has stripes of four widths, which are 4cm, 3cm, 1.2cm, and 0.6cm. According to the needs of the actual situation, you can also choose a combination of stripes with...
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