Description:
Hyperspec Lidar camera calibration tool is a web-based tool that is used to calibrate the position and orientation of a lidar sensor and a camera sensor relative to each other. Lidar sensors use laser light to create a three-dimensional representation of the surrounding environment, while cameras capture two-dimensional images. In order to accurately fuse data from both sensors, their positions and orientations need to be calibrated with high precision.
The lidar camera calibration tool typically works by projecting a known pattern of light from the lidar sensor onto a flat surface, which is captured by the camera sensor. The tool then analyzes the captured image to determine the precise location of the pattern of light in the image. Using this information, the tool can calculate the position and orientation of the lidar sensor relative to the camera sensor, and vice versa.
The lidar camera calibration tool is typically used in autonomous vehicles, robotics, and other applications that require accurate sensor fusion. Accurate calibration of the lidar and camera sensors is crucial for these systems to function effectively and safely.
How to access Lidar Camera Calibration Tool:
User Interface:
The user interface of a Hyperspec lidar camera calibration tool includes the following:
Input data: The tool will typically require input data such as the lidar and camera sensor data files, and the calibration pattern used for calibration. In the lidar camera calibration tool user can open the lidar camera sensor dataset via trip database-annotation tools. Here user will be able to see an overlay of camera images which was calibrated in the camera calibration tool and lidar dataset.
Calibration settings: The tool has settings for specifying the type of calibration to perform, such as intrinsic calibration (Fx,Fy,a,b), Camera to Lidar (offset, Rotations, and FoV)
for Intrinsic adjustments user can use sliders to adjust the values, new values will directly reflect in the images.
For Camera to lidar corrections, the user can type the values in the provided field. once click on rerender these values will start reflecting in the lidar dataset.
Save: The user may proceed to save the data for each window individually by utilizing the designated save button.
Visualization: The tool has a visualization component that shows the image, the lidar data, and the calibration results. Similar to other tools this tool also has three different windows for left, center, and right camera images.
Toggle: The user can use the toggle button to switch the view between the lidar and the camera view.
Calibration results: The tool will display the calibration results, such as the transformation and the calibration error, which indicates the accuracy of the calibration.
The goal of the user interface is to provide an intuitive and user-friendly way to perform the calibration process and analyze the results. The interface is designed to help users understand the calibration process and facilitate accurate calibration of the lidar and camera sensors.
Process:
Here are the general steps for using the Hyperspe LIDAR image calibration tool:
- Load LIDAR and camera data: Load the LIDAR and camera data into the LIDAR image calibration tool.
- Calibration: Calibrate the LIDAR data by changing values such as intrinsic calibration (Fx,Fy,a,b), Camera to Lidar (offset, Rotations, and FoV) for Intrinsic adjustments user can use sliders to adjust the values, new values will directly reflect in the images. For Camera to lidar corrections, the user can type the values in the provided field. once click on rerender these values will start reflecting in the lidar dataset. The calibration target, such as a flat surface, and recording the LIDAR readings from multiple angles. The tool will then use these readings to determine the LIDAR sensor parameters, such as the position and orientation of the sensor relative to the vehicle.
- Image calibration: Apply the calibration parameters to the original LIDAR data to correct for any distortions, such as geometric distortion or color distortion. Once the user applies these values using rerender button these values will immediately reflect in the preview.
- Preview and adjust: Preview the calibrated images and adjust the calibration settings as necessary to fine-tune the calibration process.
- Batch processing: Tool will automatically reflect these values in the next frames/images to save time and increase efficiency. If user users perceive that the necessary corrections have been executed, they may proceed to save the data for each window individually by utilizing the designated save button and proceed to the next dataset.
It is important to note that the specific steps and settings for using a LIDAR image calibration tool may vary depending on the tool and the specific application. It may be necessary to consult the tool's documentation or seek expert guidance to ensure accurate and reliable calibration of the LIDAR data.