Image detection method for scales of non-ruler-line pointer instrument
A technology of ruler scale and ruler line, which is used in image analysis, image data processing, instruments, etc., can solve the problems of large systematic errors in automatic reading, cumbersome methods, and reduced reliability.
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[0108] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0109] The overall flow chart of the proposed method of the present invention is as figure 1 shown.
[0110] like figure 2 Shown is the image of the meter head of the embodiment collected according to step i and step iii of the method proposed in the present invention.
[0111] The parameter setting described in step ii is as follows, wherein the actual physical length has been converted into the corresponding image pixel length: l tick,min = 50 pixels; l tick,max = 150 pixels; w tick,max = 10 pixels; ε tick_base =10 pixels; N tick =31;k=0.5;α first = π / 6; α last =5π / 6;f peri =TRUE; υ t ={0V,1V,L,30V}.
[0112] like image 3 Shown is the binary image of the header of the embodiment obtained by segmenting steps iv to v of the method proposed in the present invention, wherein the segmentation threshold used is 128, and the ...
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