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11.7 Test Images
11.7.3
Troubleshooting using the LFSR
To control the quality of your complete imaging system enable the LFSR mode, set the camera
window to 1024 x 1024 pixels (x=0 and y=0) and check the histogram. The camera window can
also be set to a multiple of this resolution (e.g. 2048 x 2048 or 4096 x 3072) if the camera
model supports this resolution. If your image acquisition application does not provide a
real-time histogram, store the image and use an image viewing tool (e.g. ImageJ) to display
the histogram.
In the LFSR (linear feedback shift register) mode the camera generates a constant
pseudo-random test pattern containing all grey levels. If the data transmission is correctly
received, the histogram of the image will be flat (Fig. 11.21). On the other hand, a non-flat
histogram (Fig. 11.22) indicates problems, that may be caused either by a defective camera, by
problems in the acquisition software or in the transmission path.
Figure 11.21: LFSR test pattern received and typical histogram for error-free data transmission
Figure 11.22: LFSR test pattern received and histogram containing transmission errors
In robots applications, the stress that is applied to the camera cable is especially high due to
the fast movement of the robot arm. For such applications, special drag chain capable cables
are available. Please contact the Photonfocus Support for consulting expertise.
MAN082 09/2019 V1.0
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Содержание MV0 3D06 Series
Страница 10: ...1 Preface 10 of 125 MAN082 09 2019 V1 0...
Страница 20: ...3 Product Specification 20 of 125 MAN082 09 2019 V1 0...
Страница 38: ...4 Image Acquisition 38 of 125 MAN082 09 2019 V1 0...
Страница 48: ...5 Counter Timer 48 of 125 MAN082 09 2019 V1 0...
Страница 58: ...9 Image Format Control 58 of 125 MAN082 09 2019 V1 0...
Страница 62: ...10 Frame Rate 62 of 125 MAN082 09 2019 V1 0...
Страница 88: ...11 Image Data Processing 88 of 125 MAN082 09 2019 V1 0...
Страница 92: ...12 Precautions 92 of 125 MAN082 09 2019 V1 0...
Страница 100: ...13 Hardware Interface 100 of 125 MAN082 09 2019 V1 0...
Страница 104: ...14 Mechanical Considerations 104 of 125 MAN082 09 2019 V1 0...
Страница 106: ...15 Troubleshooting 106 of 125 MAN082 09 2019 V1 0...
Страница 112: ...18 Support and Repair 112 of 125 MAN082 09 2019 V1 0...
Страница 114: ...19 References 114 of 125 MAN082 09 2019 V1 0...
Страница 125: ...D Document Revision History Revision Date Change 1 0 September 2019 First version MAN082 09 2019 V1 0 125 of 125...