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2.1

 

Overview 

The dark-field correction and the bright-field correction are both part of the flat field correction that 

corrects for DSNU and PRNU, which both require two different calibration processes. 

The flat field correction is used to improve the quality of the image by removing the artifacts that are 

caused by  fixed pattern noise and variations in the pixel-to-pixel sensitivity of the detector. A flat 

field correction corrects for dark signal non-uniformities (DSNU), photo response non-uniformities 

(PRNU) and/or artifacts caused by the illumination and illumination optics. These application notes 

describe how to calibrate the flat field functions and how to use them to improve the quality of the 

image. These functions are available in all JetCam series cameras. 

 

 

Figure 1 : JetCam Camera front view with lens 

2.2

 

Requirements  

 

A computer with the following:

 

 

Processor with an Intel 64-bit architecture, or equivalent 

 

An availably x4 (or x8 or x16) PCIe Gen 3 slot  

 

Vision Point Application installation 

 

JetCam Camera  

 

Komodo Fiber Frame Grabber 

 

Fiber cables (Multi or Single mode) 

 

Fiber QSFP+ or/and SFP+ modules (depending on camera design) 

 

2

 

Introduction 

Summary of Contents for JetCam

Page 1: ...ems GmbH Geisenhausenerstr 18 81379 Munich Germany 49 89 780 2970 info skyblue de www skyblue de In Great Britain Zerif Technologies Ltd Winnington House 2 Woodberry Grove Finchley London N12 0DR 44 1...

Page 2: ...RE 3 JETCAM CAMERA SIDE VIEW W O LENS 4 FIGURE 4 DARK FIELD CALIBRATION STEPS 5 FIGURE 5 FLAT FIELD CALIBRATION STEPS 6 FIGURE 6 UNIFORM LIGHT SOURCE BEFORE VS AFTER FLAT FIELD CALIBRATION 6 FIGURE 7...

Page 3: ...photo response non uniformities PRNU and or artifacts caused by the illumination and illumination optics These application notes describe how to calibrate the flat field functions and how to use them...

Page 4: ...with the socket electrical connector 3 Insert the fiber cable into the module by firmly pushing each cable into the module until you will hear a click 4 Connect the Power Adaptor to the JetCam power...

Page 5: ...brate It only requires a reference image to be recorded without illumination on the image sensor Follow this steps to perform dark field calibration process 1 For dark field calibration the light shou...

Page 6: ...optimal result Follow this steps to perform flat field calibration process 1 Prepare light source Uniform light should be applied across the sensor This can be achieved by removing the lens and settin...

Page 7: ...lable gain is not sufficient to correct for the difference between the weakest and brightest illuminated pixel segment a flat field cannot be achieved Figure 6 Uniform light source before vs after fla...

Page 8: ...arameter configurations In addition a Default UserSet is available so it will be possible to revert back to default factory settings 1 Selection between the different available user configuration Defa...

Page 9: ...and loading user set parameter configurations for a specific camera using Vision Point application Save User Set 1 Calibrate the desired camera parameters in Camera tab 2 Open User Set Control catego...

Page 10: ...Volatile memory save function call sequence 1 UserMemoryBulkErase erase all user non volatile memory 2 UserMemoryPageSelector select page 255 0 in memory 256 bytes for each page 3 UserMemoryPageAll ar...

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