Method and apparatus for calibrating video camera
First Claim
1. A method for calibrating a video camera, comprising:
- obtaining internal and external parameters of the video camera according to a reference template to calibrate the camera preliminarily, and recording data of a reference object in the same scene with the reference template; and
when the video camera needs recalibration, obtaining images of the reference object from at least two perspectives, obtaining the internal and external parameters of the video camera at the time based on the recorded data and the images of the reference object, recalibrating the video camera base on the images of the reference object from at least two perspectives and the internal and external parameters of the video camera at the time.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for calibrating the video camera includes: obtaining the internal and external parameters of the video camera according to a reference template; recording data of a reference object in the scene; obtaining images of the reference object from at least two perspectives; and obtaining the internal and external parameters of the video camera according to the recorded data of the reference object. An apparatus for calibrating the video camera includes: a preliminary calibration unit, configured to obtain the internal and external parameters of the video camera according to a reference template, and record the data of a reference object in the scene; a recalibration unit, configured to obtain images of the reference object from at least two perspectives, and obtain the internal and external parameters of the video camera according to the recorded data of the reference object. The invention is applicable to various scenes and features simple operations.
-
Citations
19 Claims
-
1. A method for calibrating a video camera, comprising:
-
obtaining internal and external parameters of the video camera according to a reference template to calibrate the camera preliminarily, and recording data of a reference object in the same scene with the reference template; and when the video camera needs recalibration, obtaining images of the reference object from at least two perspectives, obtaining the internal and external parameters of the video camera at the time based on the recorded data and the images of the reference object, recalibrating the video camera base on the images of the reference object from at least two perspectives and the internal and external parameters of the video camera at the time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. An apparatus for calibrating a video camera, comprising:
-
a preliminary calibration unit, adapted to;
obtain internal and external parameters of the video camera according to a reference template, and record data of a reference object in the same scene with the reference template; anda recalibration unit, adapted to;
when the video camera needs recalibration, obtain images of the reference object from at least two perspectives, obtain the internal and external parameters of the video camera at the time according to the recorded data of the reference object, calibrate the video camera base on the images of the reference object from at least two perspectives and the internal and external parameters of the video camera at the time. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
-
Specification