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11.5 3D Features
11.5.4
Interpolation Technique
Structured light based systems crucially rely on an accurate determination of the peak position
of the Gaussian shaped laser line. The LineFinder algorithm in the MV0 Python 3D06 cameras
applies nonlinear interpolation techniques, where 16 data points are calculated between two
pixels within the Gaussian shaped laser line. This technique is superior to other commonly used
detection techniques, such as the detection of peak pixel intensity across the laser line
(resulting in pixel accuracy) or the thresholding of the Gaussian and calculation of the average
(resulting in sub pixel accuracy).
The nonlinear interpolation technique used in the LineFinder algorithm results in a better
estimate of the maximum intensity of the laser line. The data mapping for the 3D data block is
shown in Section 11.5.6 and the basics of the interpolation principle are illustrated in Fig. 11.8.
The line position (PEAK) is split into a coarse position and a fine position (sub-pixel). The coarse
position is based on the pixel pitch and is transferred in PEAK [15:4]. The sub-pixel position that
was calculated from the LineFinder algorithm is mapped to PEAK [3:0] (see also Section 11.5.6).
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MAN082 09/2019 V1.0
71 of 125
Summary of Contents for MV0 3D06 Series
Page 10: ...1 Preface 10 of 125 MAN082 09 2019 V1 0...
Page 20: ...3 Product Specification 20 of 125 MAN082 09 2019 V1 0...
Page 38: ...4 Image Acquisition 38 of 125 MAN082 09 2019 V1 0...
Page 48: ...5 Counter Timer 48 of 125 MAN082 09 2019 V1 0...
Page 58: ...9 Image Format Control 58 of 125 MAN082 09 2019 V1 0...
Page 62: ...10 Frame Rate 62 of 125 MAN082 09 2019 V1 0...
Page 88: ...11 Image Data Processing 88 of 125 MAN082 09 2019 V1 0...
Page 92: ...12 Precautions 92 of 125 MAN082 09 2019 V1 0...
Page 100: ...13 Hardware Interface 100 of 125 MAN082 09 2019 V1 0...
Page 104: ...14 Mechanical Considerations 104 of 125 MAN082 09 2019 V1 0...
Page 106: ...15 Troubleshooting 106 of 125 MAN082 09 2019 V1 0...
Page 112: ...18 Support and Repair 112 of 125 MAN082 09 2019 V1 0...
Page 114: ...19 References 114 of 125 MAN082 09 2019 V1 0...