Method for extracting contour of characters in a fancy style based on chromatic aberration effect of linear laser measuring head
A contour extraction, laser probe technology, applied in measurement devices, optical devices, instruments, etc., can solve problems such as original design distortion, and achieve the effects of simple algorithm, extended application scope, and easy implementation.
Inactive Publication Date: 2012-10-31
ZHEJIANG UNIV
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Problems solved by technology
Among them, method ① does not require hardware sensors, and the method is simple, but profiling and redrawing rely on human subjectivity, which is easy to distort the original design; method ② can effectively extract the outline of artistic characters, but this method relies on CCD sensors, and needs to be designed for image boundary extraction algorithm
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[0035] The present invention will be further described below in conjunction with drawings and embodiments.
[0036] Such as figure 1 As shown, the present invention installs the line laser measuring head 2 on the Z-axis 1 of the three-coordinate measuring machine, and the paper 6 with the artistic word 5 is tiled on the workbench of the three-coordinate measuring machine. When the line laser measuring head 2 is in the When it is turned on, the measuring head emits a triangular laser surface 3, which produces a laser line 5 on the paper.
[0037] The line laser measuring head 2 used in the present invention is the F-SCAN LS60 type measuring head. Such as figure 2 As shown, the reference distance of the F-SCAN LS60 probe is 95mm, the effective laser line length is 60mm, and the measurable depth is 60mm. The F-SCAN LS60 type probe calculates the measuring distance by receiving the diffuse reflection light generated by the incident laser line 4 on the surface of the measured o...
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The invention discloses a method for extracting the contour of the characters in a fancy style based on a color variation effect of a linear laser measuring head, and the method comprises the following steps: laying the paper with the characters in a fancy style on the workbench of a three-coordinate measuring machine; utilizing the linear laser measuring head to comprehensively scan the paper; when laser lines are projected to the region at which the characters in a fancy style are positioned from the blank background region of the paper and the blank background of the paper and the characters have the color variation, the linear laser measuring head generates the color variation effect because of the different sensitivity degrees of different colors, thus the measuring values jump in the change position of the color variation; and the jumping points are recorded through a system and stored as boundary contour points, and then the boundary contour points are fitted into a closed B spline curve, thereby obtaining the contour of the measured characters in a fancy style. According to the method disclosed by the invention, the two-dimensional contour extraction of the characters in afancy style is realized by utilizing the characteristics of the color variation effect of the linear laser measuring head in the measuring course; and the method provided by the invention has the advantages of simple course and easiness for realization, and ensures that the application range of the linear laser measuring head can be expanded.
Description
technical field [0001] The invention relates to a method for extracting the outline of artistic characters, in particular to a method for extracting the outline of artistic characters based on the chromatic aberration effect of a line laser probe. Background technique [0002] Artistic characters, such as calligraphy written by calligraphers or variant characters designed by font designers, have the functions of spreading culture, showing historical rhyme, embodying beauty, adding fun, eye-catching and easy to recognize, and expressing ideas. They are widely used in daily necessities, publicity, etc. , advertisements, trademarks, slogans, and commodity packaging and decoration. [0003] After the calligrapher or designer completes the creation on the two-dimensional drawings, it is generally necessary to extract the outline of the created artistic word, that is, to digitally measure the artistic word, and convert the artistic word from a physical map to a vector diagram for ...
Claims
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IPC IPC(8): G01B11/24
Inventor 卢科青王文吴尧锋高曙明陈子辰
Owner ZHEJIANG UNIV