Flat Field Image Shading Correction | Faber M640, M1600, M1024, M1400

Flat Field (Image Shading) Correction

Image Shading correction, also know as Flat Field Correction is the process of eliminating small gain differences between pixels in a sensor array. That sensor when exposed to a uniformly lit field will have no gray level differences between pixels when calibrated flat field correction is applied to the image. The Genie camera stores flat field correction data until power off or in its user setting state for recall at any time (see "Power-up Configuration" on page 32). Flat field correction data is composed of 8 bit gain and 8 bit offset coefficients.

The CamExpert Flat Field Correction tool allows calibrating. saving, and loading the flat field calibration data for any Genie camera being controlled.

Before performing calibration, verify Genie acquisition with a live grab. Also at this time make preparations to grab a flat light gray level image, required for the calibration, such as a clean evenly lighted white wall or non-glossy paper. Note the lens iris position for a white but not saturated image. Additionally check that the lens iris closes well or have a lens cover to grab the dark calibration image.

Flat Field Correction Calibration Procedure

Calibration is the process of taking two reference images, one of a black field – one of a light gray field (not saturated), to generate correction data for images captured by Genie. Each sensor pixel data is modified by the correction factor generated by the calibration process, so that each pixel now has an identical response to the same illumination.

Start the Flat Field calibration tool via the CamExpert menu bar:

Pre-processing • Flat Field Correction • Calibration.

Flat Field Calibration Window

The Flat Field calibration window provides a three step process to acquire two reference images and then save the flat field correction data for the Genie used. To aid in determining if the reference images are valid, a histogram tool is provided so that the user can review the images used for the correction data.

58 • Operational Reference

Genie Monochrome Series-GigE Vision Camera

Image 60

Faber M640, M1600, M1024, M1400 user manual Flat Field Image Shading Correction, Flat Field Correction Calibration Procedure

Contents

Genie Monochrome Series Genie Framework M640 M1024 M1400 M1600 CA-GENM-MUM00 Contents Ynchronization T Iming Sapera Camexpert Guide Dalsa Contact Information Genie Monochrome Series Overview Description Genie Application Advantages Camera Sensor Size Resolution Genie Cables & Accessories sold separately Product numberProduct Part Numbers Fps Product Number Camera Performance Specifications Supported Industry Standards Genie Sensor OverviewCertifications RoHS Genie M640-1/2 Specifications Item / Feature Specification Genie M640-1/3 Specifications Genie M1024 Specifications Genie M1400 Specifications ICX267AL Genie M1600 Specifications Application Development Overview Sapera LT Library with optional ProcessingGenICam Environment Page Installing the Genie Camera Supported Network ConfigurationsUsing Genie with Ethernet Switches GigE Network Adapter Guideline Installation Overview & Preparations Using Genie with a Vlan Ethernet SwitchNetwork and Computer Overview Sapera LT Library Installation Installation Overview Genie CD Package Installation ProcedureGigE Server Verification Connectors Connect the Genie Camera Status LED Codes LED State Definition Genie IP Configuration Sequence Typical LED States on Power UpGigE Server Status Optimizing the Network Adapter used with Genie Increasing Adapter Buffers and Jumbo Frames Select NIC Advanced Configuration Properties Receive Descriptors Running the Network Configuration Tool Jumbo Frames Updating Genie Firmware Page Quick Test with CamExpert About the User-Defined Camera Name Access Via CamExpert Operational ReferenceCamera and Sensor Information Power-up Configuration Read Only ParametersUser Set Parameters Parameter Description Sapera Camera Information via Sapera LT or GenICam Applications Sensor Controls Sensor Parameters Controls Via CamExpert Controls on Gain and Black Level Controls Partial Scan-Window ROI Partial Scan vertical croppingVertical Lines M640 M1024 M1400 Acquired Partial Scan horizontal cropping Window ROI Window ROI Control via Sapera LT or GenICam Applications CamExpert Image Buffer and ROI Parameters Binning Trigger Modes Binning Control via Sapera LT or GenICam Applications Exposure Controls Free-running Programmable Exposure External Trigger Programmable Exposure External Trigger Level-controlled Exposure Exposure Controls via Sapera LT or GenICam Applications Synchronous Mode Synchronization Timing Reset Mode Synchronization Mode via Sapera LT or GenICam Applications CamExpert I/O Controls Dialog Parameter Description External Input Signal Opto-coupler & Debounce Circuit General Inputs Settings Via CamExpertGeneral Inputs Input Controls via Sapera LT or GenICam Applications TriggerSelector = not used General Outputs Settings via CamExpert Strobe and General Outputs Open and Close Output Settings Strobe On Start of Exposure Event Mode Pulse On Valid Trigger Event Mode Pulse On Invalid Trigger Event Mode Pulse On Start of Readout Event Mode Pulse On End of Readout Event Mode Pulse On End of Acquisition Event Mode Pulse On Input 1 or Input 2 Event Modes Genie Processing Features Output Control via Sapera LT or GenICam ApplicationsLookup Table LUT LUT Control via Sapera LT or GenICam Applications Sapera++ classes used Flat Field Correction Calibration Procedure Flat Field Image Shading Correction CamExpert Flat Field Calibration Menu Using Flat Field Correction Image Flip HorizontalVertical Internal Image Test Patterns Genie test patterns are Events Test Image Select via Sapera LT or GenICam ApplicationsSapera Callbacks Event Selection via GenICam Applications Transfer Event Name Description Network Controls & GigE Vision Parameters CamExpert GigE Vision Parameters Network Controls via Sapera LT or GenICam Applications Genie Power-up Configuration ROI Sapera Supported Features List Power-up Control via Sapera LT or GenICam ApplicationsAccessing Features with Sapera++ LT Feature Type String Feature Type EnumFeature Name Access Type Value Feature Name Access Type Values LUTFormat Feature Type INT32 Feature Name Access Type Exponent Sample Value Feature Type Bool Feature Interdependence Diagrams Trigger Enable True Trigger Enable False Output Selector Vertical BinningHorizontal Binning Network Configuration Mode Pixel FormatPage IP Configuration Mode Details Network ToolsLink-Local Address LLA Dhcp Dynamic Host Configuration Protocol Persistent IP Network Configuration Tool Quick Genie Network Configuration System Information and Configuration Network Card Information and Configuration NIC IP and Network Imaging Driver Assignment Recovering a Camera with an Unknown Persistent IP To recover a Genie Sapera GigE Server Details Creating a Status Report Status Window Description Using CamExpert with Genie Monochrome Cameras Sapera CamExpert Guide CamExpert Panes CamExpert LUT Controls Software trigger button Bit Invert LUT Technical Specifications Mechanical Specifications Connectors Pin Hirose Connector Signal DetailsPin Direction Genie Signal see details below Genie Signal Electrical Details External InputsInput Electrical Parameter Description Value RJ45 LAN Ethernet Connector Details External OutputsOutput Electrical Parameter Description Value Network Connection Network Activity Camera Status LED Optical ConsiderationsIllumination Light Sources Magnification and Resolution FiltersLens Modeling Primary Points in a Lens System Sensor Handling Instructions Electrostatic Discharge and the CCD SensorProtecting Against Dust, Oil and Scratches Cleaning the Sensor Window Environment Ruggedized RJ45 Ethernet Cables Ethernet Switch Requirements Computer Requirements for Genie CamerasHost PC System Ethernet to Fiber-Optic Interface Requirements EC & FCC Declaration of Conformity Troubleshooting Problem Type SummaryOverview Device IP Error Device Available but with Operational IssuesDevice Not Available Installation Issues and Functional Problems GigE Server Warning Example 1a IP error with multiple NICs GigE Server Warning Example 1b IP error with multiple NICs GigE Server Warning Example 2 Subnet Mask or IP error GigE Server Warning Example 3 Filter Driver CorSnid Disabled Device Available with Operational Issues Firmware Updates Power Failure During a Firmware Update-Now What? Streaming Error No Acquisition with a Timeout MessageDisabling Windows Firewall Turning Windows Firewall Off Test a Genie Using Internal Test Patterns Cabling and IP Configuration IssuesStreaming Video grab Issues Grab Remains Black Grab has Random Bad Data or NoiseGrab has Random Bad Data or Noise Case Laptop Computer Networking Issues Configuration Recommendations with Laptops Problems when Changing the Laptop NIC Ethernet Switch Issues Multiple Camera IssuesProblems with Disconnecting NICs Camera Exposure Issues No camera exposure when expected Verifying Network Parameters VPN Driver Interference Troubleshooting Genie Monochrome Series-GigE Vision Camera Dalsa Contact Information Genie Sales InformationInternational/Canada Genie Technical Support Glossary of Terms Acquiring an image frame SAT Glossary of Terms Genie Monochrome Series-GigE Vision Camera Index Genie Monochrome Series-GigE Vision Camera Index Index Genie Monochrome Series-GigE Vision Camera Genie Monochrome Series-GigE Vision Camera Index