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9 Pixel Data Processing
Figure 9.21: LFSR (linear feedback shift register) test image
9.8.3
Troubleshooting using the LFSR
To control the quality of your complete imaging system enable the LFSR mode, set the camera
window to 512 x 512 pixels (x=0 and y=0) and check the histogram. If your frame grabber
application does not provide a real-time histogram, store the image and use a graphic software
tool 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. 9.22). On the other hand, a non-flat
histogram (Fig. 9.23) indicates problems, that may be caused either by a defective camera, by
problems in the acquisition software or in the transmission path.
Figure 9.22: LFSR test pattern received at the frame grabber and typical histogram for error-free data
transmission
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MAN076 09/2017 V1.0
Summary of Contents for MV3-D640I-M01-144-CL
Page 10: ...1 Preface 10 of 121 MAN076 09 2017 V1 0...
Page 34: ...4 Image Acquisition 34 of 121 MAN076 09 2017 V1 0...
Page 46: ...6 I O Control 46 of 121 MAN076 09 2017 V1 0...
Page 76: ...9 Pixel Data Processing 76 of 121 MAN076 09 2017 V1 0...
Page 78: ...10 Thermoelectric Cooler TEC 78 of 121 MAN076 09 2017 V1 0...
Page 82: ...11 Precautions 82 of 121 MAN076 09 2017 V1 0...
Page 94: ...12 Hardware Interface 94 of 121 MAN076 09 2017 V1 0...
Page 100: ...14 Troubleshooting 100 of 121 MAN076 09 2017 V1 0...
Page 106: ...17 Support and Repair 106 of 121 MAN076 09 2017 V1 0...
Page 108: ...18 References 108 of 121 MAN076 09 2017 V1 0...
Page 112: ...A Pinouts 112 of 121 MAN076 09 2017 V1 0...