Correction of Terrestrial Laser Scanning Ranging Errors from Specular Reflection Based on Original Intensity Data

Fig. 2. Original intensity images of four different kinds of material surfaces. (a) Ceramic tile; (b) polyethylene; (c) stainless garbage; (d) LCD screen

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Fig. 3. Three-dimensional points cloud distributions of four different kinds of material surfaces. (a) Ceramic tile; (b) polyethylene; (c) stainless garbage; (d) LCD screen

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Fig. 4. Relationship between original intensity and range errors from specular reflections of four different kinds of material surfaces. (a) Ceramic tile; (b) polyethylene; (c) stainless garbage; (d) LCD screen

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Fig. 5. Polynomial fitting between intensity and range errors from specular reflections of four different kinds of material surfaces. (a) Ceramic tile; (b) polyethylene; (c) stainless garbage; (d) LCD screen

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Table 1. Main parameters of FARO Focus3D 120
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Table 1. Main parameters of FARO Focus3D 120
Emittedpower /mW Wave-length /nm Field ofview /(°×°) Beamdiver-gence /(°) Rangingscope /m Exit beamdiameter /mm
20 905 360×305 0.009 0.6-120 3.8

Table 2. Relationship between order of polynomial curve and determination coefficient r2 in Fig. 5
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Table 2. Relationship between order of polynomial curve and determination coefficient r2 in Fig. 5
Targets First-order r² Second-order r² Third-order r²
Ceramic tile 0.88833 0.94284 0.95471
Polyethylene 0.86596 0.93675 0.93696
Stainless steel garbage 0.85031 0.94138 0.95168
LCD screen 0.90195 0.96139 0.96144

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Jin Chen, Kai Tan, Weiguo Zhang. Correction of Terrestrial Laser Scanning Ranging Errors from Specular Reflection Based on Original Intensity Data[J]. Laser & Optoelectronics Progress, 2019, 56(5): 050102

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