Laser Marking Technology of Color Direct Part Marking Based on Data Matrix

Ying Geng; Jianmei Li; Hongzhi Gao

doi:10.3788/LOP57.091202

Laser & Optoelectronics Progress, Volume. 57, Issue 9, 091202(2020)

Laser Marking Technology of Color Direct Part Marking Based on Data Matrix

Ying Geng, Jianmei Li^*, and Hongzhi Gao

Key Laboratory of High-Efficiency and Clean Mechanical Manufacture, Ministry of Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong 250061, China

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Figures & Tables(10)

Fig. 1. Generation process of a color Data Matrix two-dimensional barcode

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Fig. 2. Marking process of a color Data Matrix two-dimensional barcode

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Fig. 3. Example of color Data Matrix two-dimensional barcode samples

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Fig. 4. Color normalization process of each module. (a) Color barcode image; (b) division of the corrected image; (c) image after color unification of each module

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Fig. 5. 4 colors Data Matrix two-dimensional barcode after barcode reconstruction

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Fig. 6. Information matrix extraction of color two-dimensional barcode. (a) Information area of color two-dimensional barcode; (b)-(d) areas of each color; (e)-(g) locations and numbers of each color module

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Fig. 7. Segmentation process of color two-dimensional barcode image

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Table 1. Capacity comparison between color Data Matrix two-dimensional barcodes and original Data Matrix two-dimensional barcodes

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Table 1. Capacity comparison between color Data Matrix two-dimensional barcodes and original Data Matrix two-dimensional barcodes

Size of originalData Matrixtwo-dimensionalbarcode S₁	Size of colorData Matrixtwo-dimensionalbarcode S₂	Compressionratio (S₁-S₂)/S₁×100% /%
10×10	8×8	36
12×12	10×10	31
14×14	12×12	27
16×16	12×12	43
18×18	14×14	40
︙	︙	︙

Table 2. Laser processing parameters of yellow, purple, and blue
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Table 2. Laser processing parameters of yellow, purple, and blue
Observedcolor Currentintensity /A Pulsefrequency /kHz Scanningspeed /(mm/s) Fillspacing /μm
Yellow 16 10 72.5 36
Purple 16 10 78 21
Blue 16 10 47.5 45

Table 3. Centriods and corresponding colors of color clustering
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Table 3. Centriods and corresponding colors of color clustering

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Ying Geng, Jianmei Li, Hongzhi Gao. Laser Marking Technology of Color Direct Part Marking Based on Data Matrix[J]. Laser & Optoelectronics Progress, 2020, 57(9): 091202

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