Image Engineering Geocal User Manual
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Summary of Contents for Image Engineering Geocal
- Page 1 User Manual Geocal / Geocal XL / Geocal IR Image Engineering GmbH & Co KG Translated version Issue EN 2024-03...
- Page 2 Project name: Geocal / Geocal XL / Geocal IR Trade name: Geocal / Geocal XL / Geocal IR Product name: Geocal / Geocal XL / Geocal IR Item number: 100200215 / 100200217 / 100205016 Manufacturer: Image Engineering GmbH & Co. KG...
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Page 3: Table Of Contents
Sub-assembly 3 - DOE and DOE holder ..........16 Interfaces and power supply requirements ........... 16 Functional diagram / functional sequence ..........17 Transportation and storage ............... 18 3/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... - Page 4 Operating the device ................23 Switch off the device ................28 Differences between the Geocal variants ......... 29 Why a larger version of the Geocal? ............ 29 Why an infrared version of the Geocal? ..........30 Operating software ................31 10.1 Installing the Geocal software ..............
- Page 5 Care instructions and recycling ............44 12.1 Care ..................... 44 12.2 Disposal and recycling ................. 44 Technical data ..................45 Appendix .................... 47 14.1 Service addresses ................47 5/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
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Page 6: About These Operating Instructions
About these operating instructions You must read these operating instructions before operating Geocal / Geocal XL / Geocal IR (hereinafter referred to as Geocal, unless a specific variant is meant) for the first time or before carrying out any other work on Geocal. -
Page 7: Presentation Of Information
Damage to the device and the surrounding area Tab. 1.2 Warning levels The warnings are structured as follows: ◼ Warning sign with signal word corresponding to warning level 7/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 8: Technical Terms And Abbreviations Used
This sign warns of visible or invisible laser radiation Technical terms and abbreviations used Abbreviation Meaning Diffractive optical element, diffraction grating Device under test Region of Interest Tab. 1.3 Abbreviations used 8/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 9: General Safety Regulations
Intended use Geocal is designed to geometrically calibrate camera systems using a grid of light points projected from infinity. Geocal provides the hard- ware basis with which the calibration pattern can be recorded. The recorded images are evaluated using the software supplied. The de- vice may only be operated indoors. -
Page 10: Foreseeable Misuse
Risk of crushing due to the appliance falling down Only place Geocal on stable, level and horizontal surfaces. 2. Take a long look into the optics , or the DOE of the Geocal 3. Removal of the diffractive optical element (DOE) by the user 4. -
Page 11: Safety Regulations
CAUTION! Visible or invisible laser radiation of laser protection class 1M 11/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 12: Care, Maintenance And Inspection Work
1M Danger to the human eye with refocusing Do not look into the beam with optical instruments! Selection and qualification of personnel Geocal may only be operated by persons who have carefully read these operating instructions. 12/48 Issue EN 2024-03... -
Page 13: Safety Signs
General safety regulations 2 Safety signs The following warning is attached to the side of the housing of Geocal and Geocal XL: The following warning is attached to the side of the Geocal IR hous- ing: When closed (state of delivery), all variants are laser class 1M prod- ucts. -
Page 14: Scope Of Delivery Of The Device
The desktop power supply is not part of the product and must be purchased separately. When selecting a power supply unit, observe the require- ments and recommendations in chapter 4.5 - Interfaces and power supply requirements 14/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 15: Structure And Function
Structure and function 4 Structure and function General overview Fig. 4.1 from left to right - Geocal XL, Geocal, Geocal IR 1. Sub-assembly 1 - Electronic unit 2. Sub-assembly 2 - Optical unit 3rd Sub-assembly 3 - DOE and DOE holder... -
Page 16: Sub-Assembly 2 - Optical Unit
Interfaces and power supply requirements Geocal has a USB type B interface and a power connection socket on the back of the housing. USB interface:... -
Page 17: Functional Diagram / Functional Sequence
Functional diagram / functional sequence A brief schematic representation of the use of Geocal is as follows. 1. Switch on Geocal 2. Place your camera / DUT on a tripod or similar in front of the Geocal 3. -
Page 18: Transportation And Storage
Geocal may only be operated indoors. Place Geocal on a stable, level, non-inclined surface To minimize the risk of bumping, Geocal requires a minimum footprint of approx. 85 x 25 cm (Geocal XL) or 58 x 15 cm (Geocal / Geocal IR). CAUTION! -
Page 19: Storage
Requirements for the storage location • Temperature range: +15 - +35°C • No direct, permanent UV radiation • Sand and dust-free environment • Rel. humidity: max. 75% without condensation 19/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 20: Installation And Commissioning
Geocal may only be operated indoors. Place Geocal on a stable, level, non-inclined surface To minimize the risk of bumping, Geocal requires a minimum footprint of approx. 85 x 25 cm (Geocal XL) or 58 x 15 cm (Geocal / Geocal IR). CAUTION! -
Page 21: Commissioning
Optional modification for use on production lines If you want to use Geocal in a production line, we offer the option of modifying the device so that the switch no longer needs to be oper- ated to switch it on and off. -
Page 22: Operating And Display Elements
Fig. 7.1 Operating and display elements on Geocal 1. Main switch 2. Control LED (blue) 3. Power connection socket 4th USB type B interface (still without function) 5th Cable strain relief (Geocal IR only) 22/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 23: Operating The Device
633nm (Geocal, Geocal XL) or 935nm (Geocal IR). The DOE is attached to the front of the Geocal (visible glass plate in round cut-out, see Figure 8.2.1). - Page 24 If you convert RAW image data to another format, make sure that the image is demosaiced or the Bayer pattern is removed. The autofocus must be switched off. As Geocal uses a collimated beam of light that comes practically from infinity, the suitable focus distance is infinity.
- Page 25 Figure 8.2.4 and 8.2.5 for reference. Make sure that the dot grid co- vers the entire image and that the edge of the DOE is not visible. Fig. 8.2.4: Good alignment of the camera, zero order in the center 25/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
- Page 26 Fig. 8.2.5: Poor alignment of the camera, zero order not in the center Fig.8.2.6: Distance between camera and geocal The top of Geocal and the top of the camera must have the same ori- entation, as shown in Figure 8.2.6. A rotation of the camera around the optical axis of approx.
- Page 27 See Figure 8.2.7 below for an example. Fig. 8.2.7: Suitable exposure Fig. 8.2.8: Exposure too bright (red background, larger, saturated dots) 27/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
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Page 28: Switch Off The Device
Switch off the device Switch Geocal off using the toggle switch on the back of the housing. If Geocal is taken out of operation for a longer period of time, discon- nect the device from the mains. 28/48... -
Page 29: Differences Between The Geocal Variants
VIS spectrum of light (380-780nm). Geocal IR uses light with a wavelength of 935nm and is used for the calibration of cameras that work with the NIR spectrum of light. -
Page 30: Why An Infrared Version Of The Geocal
Fig. 9.1: Purpose of a Geocal XL with large DOE As shown in Figure 9.1, the angle of the windshield prevents the standard geocal from being placed close enough to the camera to provide a full-frame image of the standard DOE. This shooting situation would result in a less accurate and less reliable calibration. -
Page 31: Operating Software
Operating software 10 10 Operating software With the GEOCAL software, you can calibrate your camera system in seconds. The results can be saved as CSV or XML files. 10.1 Installing the Geocal software • Run the Geocal installer and follow the instructions ✓... - Page 32 If this option is selected, constraints are imposed on the values to be opti- mized to ensure that a feasible solution is determined. 32/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
- Page 33 This defines a threshold value (scaled from 0 to 1) below which the correlation peaks are removed when determining the offset with the highest correlation. • VecNumSamples 33/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
- Page 34 These values are determined during the optimization process and are part of the output parameters. However, they can be set to zero for troubleshooting purposes, for example. These angles are specific to Geocal and are not directly related to the calibrated camera. •...
- Page 35 Version: <Configuration Version="3" Description="Translation"> When installing the latest software, the latest configuration file is al- ways installed as well. Edit Control Parameters: Example: <MinF Use="false">0.1</MinF> 35/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
- Page 36 "over- sampling" artifacts. The usual default values for each distortion model are stored in the respective configuration file included in the installation. 36/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
- Page 37 / (1 + sign(k )*k *r + sign(k *r4 +...+ sign(k )*k *r ) xdistorted = y / (1 + sign(k )*k *r + sign(k *r4 +...+ sign(k )*k *r ) ydistorted= 37/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
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Page 38: Artificially Generated Sample Images
To familiarize yourself with the different models and the interactions of the parameters in the configuration files, you can use the default configurations specified for each model and run the GEOCAL soft- ware on the simulated images. You should get results that are very close to those used to create the simulated images. -
Page 39: Image Analysis
An ROI must be positioned on the zeroth diffraction order (the bright- est point in the center of the grid). Adjust the size of the ROI so that it contains only one point. 39/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... - Page 40 HDR image data (6). Select an algorithm (Mertens, Debevec or Robertson) for the generation and click on the "Generate HDR" button. An "HDR" subfolder is created in the 40/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual...
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Page 41: Save Results
After a successful analysis, the detected and newly projected points are displayed on the original image. Zoom into the image to get a bet- ter view. The dots have a size of one pixel. 41/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 42: Logging
The software also has a status bar at the bottom where error mes- sages from the API are displayed directly. 10.11 Exit Click on File → Exit (Ctrl+Q) to exit the software or close the window. 42/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... -
Page 43: Procedure In The Event Of Faults Or Errors
Troubleshooting 11 11 Troubleshooting 11.1 Procedure in the event of faults or errors In the event of a malfunction, take Geocal out of operation immedi- ately. To do this, pull the mains plug out of the socket. Then please contact Image Engineering Support. -
Page 44: Care Instructions And Recycling
12 Care notes and recycling 12 Care notes and recycling 12.1 Care If the housing or DOE of the Geocal is dirty, clean it with a dry cloth. NOTE Make sure that you always use a clean cloth to clean the DOE to avoid scratches, which can otherwise lead to disturbing visual effects. -
Page 45: Technical Data
30 - 120° (larger angles possible, depending on Compatible FoV the camera. Please contact us for details). GEOCAL / GEOCAL IR: approx. 575 mm x 144 mm x 170 Dimensions (L x W x H) GEOCAL XL: approx. 850 mm x 244 mm x 270 mm GEOCAL / GEOCAL IR: 3 x M5 x 0.8 internal thread in... - Page 46 Temperature range 15 - 35 °C Requirements for the Device Under Test (DUT) GEOCAL / GEOCAL IR: max. diameter of the lens: 77 mm Max. Dimensions GEOCAL XL: max. diameter of the lens: 155 mm Approx. 30 - 120° (larger values possible, depending on the Usable FoV camera.
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Page 47: Appendix
Pingxin North Road No.51, Pinghu Street, Longgang District, Shenzhen City, China 深圳市龙岗区平湖街道平新北路51号城市山海平吉中心15楼1508室 Mon-Fri: 9 a.m. to 6 p.m. (CST) 中国子公司工作时间：每周一至周五 上午9点-下午6点 Phone +86 158 8961 9096 Email: leon.xiao@image-engineering.com 47/48 Issue EN 2024-03 Geocal / Geocal IR / Geocal XL User Manual... - Page 48 Unless expressly indicated otherwise, the copyright lies with Image Engineering GmbH & Co KG. Im Gleisdreieck 5 The Image Engineering GmbH & Co KG reserves the right to change this docu- DE-50169 Kerpen mentation and the descriptions, dimensions and technical data contained therein without prior notice.
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