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Imatest's geometric calibration solution is the only one certified by the global autonomous dr
This calibration scheme is an example of parameter evaluation based on actual demonstrations.
The evaluated parameters are the internal and external parameters of the device each time the picture is acquired. The actual argument is to detect a series of feature points (such as the corners of a checkerboard) in the test picture. Based on these feature points, we associate them with the structure of the real world. The scale of parameter evaluation is the total number of evaluation data, which is usually 20-30 for a space camera system. The feature points used in the actual demonstration may appear in multiple images in the form of thousands or hundreds of midpoints.
Today we mainly introduce a more advanced geometric calibration equipment-Imatest’s geometric calibration solution, which is the only one certified by Mobileye, a global autopilot solution provider. Imatest has participated in the geometric calibration standards, requirements and solutions in the Mobileye solution. It is currently on the market. The most mature and leading solution has been favored by many world-class auto brands and has been installed in the United States, Europe, and China.
This calibration equipment can be used in production lines and laboratories at the same time. It only takes tens of seconds to calibrate a camera, and it is compatible with cameras of different field of view types. When the production line is replaced, there is no need to repeat investment.
Imatest has successfully developed a highly compatible solution for cameras with a field of view between 28° and 200°. It is the only camera calibration device on the market that supports more than 180°.
This calibration scheme is an example of parameter evaluation based on actual demonstration. The evaluated parameters are the internal and external parameters of the device in each acquisition picture. The actual argument is to detect a series of feature points in the test picture (for example, a reference pattern that identifies a unique center point). Based on these feature points, we associate them with the structure of the real world. The scale of parameter evaluation is the total number of evaluation data, which is usually 20-30 for a space camera system. The feature points used in the actual demonstration may appear in multiple images in the form of thousands or hundreds of points.
What is camera geometry calibration?
Parameter evaluation
-Internal Reference
These parameters represent the internal parameters of the spatial mapping camera in the system, and they are to be tested and evaluated. These include:
· EFL
· Skew
· Alpha
· Principle point (x,y)
· Distortion center (x,y)
· Distortion model coefficients
Normally, we do not do skew and alpha evaluation and assume that they are fixed. This is consistent with the same principle of the sensor's pixel spacing in two-dimensional space (X and Y), and these dimensions are vertical. If one or two of them cannot display the sensor well, then parameter calibration is required.
-External reference
In the process of making the camera, for each test position, the internal parameter calibration will be accompanied by the evaluation external parameter. The following parameters are returned for each camera in the system:
· Translationrelative to reference device (3-vector)
· Rotationrelative to reference device (3×3 matrix)
In addition, the posture of the test equipment at each test position will also be recorded and evaluated and returned to the system. By combining the relative reference poses, the pose of each camera can be reconstructed each time.
Why use this calibration system?
1. Avoid human error and reduce time cost. It only takes tens of seconds for this device to calibrate a camera
2. Improve speed, ensure precision and space utilization
3. High-precision test products to escort safe driving
Implementation
1. Calibrate the camera by accurately mapping the pixel position to the actual position of the monocular, binocular, and multi-camera device.
2. Combines analysis software and calibration hardware required for rapid testing on the production line.
3. Able to optimize each test setting for a specific camera, and enable the entire system to realize automatic control and calibration of the camera.
4. Imatest has successfully developed a highly compatible solution for cameras with a field of view between 28° and 200°.
Main features
1. Calculate internal parameters, external parameters and distortion
2. Can test monocular and multi-camera cameras
3. Free space test can be performed within the minimum focal length range
4. Short test time (30～90 seconds)
5. Automated testing
6. Integrated software analysis and calibration
Device Information
Length: up to 254cm
Width: the widest up to 254cm
Height: up to 198cm high
(The above size is the maximum size expected. The actual size will vary, depending on the system requirements)
For more information, please contact: sales@colorspace.com.cn
Related reading: Camera/Camera Geometric Calibration Calibration Verification
Contact: sales@colorspace.com.cn
Phone: 15817270587
Tel: 400-886-3881(周一至周五 9:00~18:00)
Email: sales@colorspace.com.cn
Add: South Building #2-1101, Lv Di Qi Hang Office Building, Hou Sha Yu, Shun Yi District, Beijing, China