16.5 Calibration and Special Testing
539
Camera to be tested
Image acquisition
equipment
Temperature monitoring
equipment
Target board
Fig. 16.3 Principle diagram of video test
linear transformation algorithm (DLT) to calculate the element of interior orientation
of the camera.
4) Principle and method of video test
Video test method is shown in Fig. 16.3. Under atmosphere and light environment, the
camera could image the target board at different distances, and the image sharpness
and image compression quality were evaluated manually.
5) Principle and method of automatic exposure test
The automatic exposure test was conducted under the different radiance light. The
camera could automatically expose the imaging target board, obtain the images under
different radiance conditions, and judge the image sharpness manually.
The test method of the automatic exposure was similar as shown in Fig. 16.3 and
different brightness conditions were realized by using the light source.
6) Principle and method of image compression test
Image compression test was to analyze and evaluate the image before and after
compression, and verify the performance of image compression algorithm. The analysis and evaluation were combined with subjective evaluation (artificial evaluation)
and objective evaluation.
Image compression test method was the same as shown in Fig. 16.1, to evaluate the
video images before and after the compression. The subjective evaluation content was
the image definition, and the objective evaluation could use the peak signal-to-noise
ratio.
16.5.2 Calibration and Special Testing of Morphology
Camera
1. Tests
The calibration and special testing of the morphology camera are listed in Table 16.9.
2. Test Principle and Method
539
Camera to be tested
Image acquisition
equipment
Temperature monitoring
equipment
Target board
Fig. 16.3 Principle diagram of video test
linear transformation algorithm (DLT) to calculate the element of interior orientation
of the camera.
4) Principle and method of video test
Video test method is shown in Fig. 16.3. Under atmosphere and light environment, the
camera could image the target board at different distances, and the image sharpness
and image compression quality were evaluated manually.
5) Principle and method of automatic exposure test
The automatic exposure test was conducted under the different radiance light. The
camera could automatically expose the imaging target board, obtain the images under
different radiance conditions, and judge the image sharpness manually.
The test method of the automatic exposure was similar as shown in Fig. 16.3 and
different brightness conditions were realized by using the light source.
6) Principle and method of image compression test
Image compression test was to analyze and evaluate the image before and after
compression, and verify the performance of image compression algorithm. The analysis and evaluation were combined with subjective evaluation (artificial evaluation)
and objective evaluation.
Image compression test method was the same as shown in Fig. 16.1, to evaluate the
video images before and after the compression. The subjective evaluation content was
the image definition, and the objective evaluation could use the peak signal-to-noise
ratio.
16.5.2 Calibration and Special Testing of Morphology
Camera
1. Tests
The calibration and special testing of the morphology camera are listed in Table 16.9.
2. Test Principle and Method