The extrinsic calibration is a prerequisite for all perception algorithms and serves as an adjustment check. Accurate calibration values and FoV-adjustments for all sensors as well as continuous “calibration-checks” are credentials for long term test drives.
So how to go from an uncalibrated setup, as seen in figure 1 (left), to an adjusted and accurately calibrated setup as seen in figure 1 (right)?
Figure 1: lidar point cloud before/after calibration
|❌ Time consuming processing|
|❌ Complicated manual measurements of calibration targets|
|❌ Availability of suitable calibration space|
|❌ Establishing relation to the “Vehicle-Road-Coordinate-System”|
|❌ Calibration of multiple sensors without overlap|
|❌ Calibrating sensors with sparse resolution|
|❌ Different methods and tools for different sensors/setups|
|❌ Heavy and clumsy targets|
|❌ Expensive equipment|
|❌ High manual effort|
Ibeo manages these challenges with one solution:
Ibeo.CaliGraph is a standalone calibration solution that supports the static extrinsic calibration of lidar sensors. The tool determines the poses of reference- and DuT- sensors within a measurement-vehicle setup. It is designed to be simple, fast, and accurate. All methods, processes and algorithms have been validated and the automated calibration routine ensures an accuracy of <1 𝑐𝑚 (translations) and <0.1° (rotations). The solution supports every lidar sensor in a variety of setups, all of which has been documented in text and video tutorials.
|✅ Simple setup of calibration scenes|
|✅ Easy and fast to use (no extended trainings needed)|
|✅ Fully automated processing|
|✅ Diagnose function evaluates results (and prompts to redo a calibration if necessary)|
|✅ Portable targets|
|✅ Highly accurate|
|✅ Derive adjustment instructions|
|✅No expensive equipment needed|
Setting up the calibration scene is easy. Simply highlight the vehicle’s axis of symmetry with a line laser and place some wooden targets on the laser beam. The only other prerequisites are a flat ground and enough free space (maximum 4 m x 30 m, depending on the sensor setup) as seen in figure 2. The analysis of a given calibration recording is even more simple. The automated calibration module allows an accurate calibration to VRC* within seconds. The diagnose module performs an adjustment check and evaluates the quality of the calibration results. The manual modules allow an experienced user to carry out any imaginable calibration task, including cross-calibration, absolute calibration to Ground Truth data*, intrinsic sensor calibration any much more.
Figure 2: Overview of supported sensor setups and calibration scenes for a measurement vehicle with different sensors/setups. Those simple target setups mixed with the efficient algorithms of the calibration tool ibeo.CaliGraph ensure accurate calibrations of all automotive lidar sensors.
Climate change is ongoing. The events sector also contributes to this development because it is closely linked to the travel and hotel industries and, therefore, has a wide reach. In this post, Ibeo has analyzed how environmentally friendly events, in which we participated, are.
Ibeo has developed a completely new, industry-wide 4D lidar sensor system. The ibeoNEXT's modular design is unique to the lidar market and, depending on the application, offers a selection of 11.2 degree, 60 degree or 120 degree optics (32 degree optics currently being developed).
Smart homes are already on everyone's lips, with many people using intelligent Internet of Things (IoT) technologies to control a wide range of different appliances and lighting in their household and thus improve their overall quality of life. However, the benefits of digitization and the IoT can be felt beyond the private sphere in the public sphere too. The concept of the smart city is becoming increasingly important in urban development. The following article answers the most important questions about Smart Cities.
Subscribe now and keep up-to-date.
By clicking ‘SIGNUP’ you consent to your personal data entered being used to send you information on relevant topics and specific publications of Ibeo. You have the right to withdraw your consent at any time. The withdrawal of consent will not affect the lawfulness of processing based on consent before its withdrawal.