Systems and methods for high-rate composite video acquisition
A method for high-rate video acquisition comprises providing a video sensor, providing a target area, providing a synchronization reference, capturing a plurality of videos of the target area, wherein each video of the plurality of videos captures a part of the target area, synchronizing the plurality of videos using the synchronization reference, and creating a composite video. Related systems and computer program products are also provided.
1. A method for high-rate video acquisition, comprising:
providing a video sensor;
providing a target area;
providing a synchronization reference;
capturing a plurality of videos of the target area, wherein each video of the plurality of videos captures a part of the target area;
synchronizing the plurality of videos using the synchronization reference; and
creating a composite video;
wherein providing the synchronization reference includes providing a moving reference object, recording the moving reference object concurrently with the plurality of videos, and extracting the synchronization reference from the recording of the moving reference object, and/or
wherein providing the synchronization reference includes providing a second video sensor, providing a moving reference object, recording video of the moving reference object using the second video sensor concurrently with the capturing of the plurality of videos, and extracting the synchronization reference from the recorded video of the moving reference object.
2. The method of claim 1 , further comprising configuring the video sensor to provide a plurality of fields of view, wherein the plurality of fields of view are used to capture the parts of the target area.
3. The method of claim 1 , wherein the video sensor has a maximum field of view, and wherein at least one video of the plurality of videos uses a reduced field of view smaller than the maximum field of view.
4. The method of claim 3 , wherein a frame rate of the video sensor for the reduced field of view is greater than a maximum frame rate of the video sensor for the maximum field of view.
5. The method of claim 3 , wherein the reduced field of view has a height smaller than a maximum height of the video sensor.
6. The method of claim 1 , wherein the plurality of synchronized videos of the target area comprise a plurality of rectangular sections of the target area.
7. The method of claim 1 , wherein the synchronization reference is an electric signal and wherein the electric signal is used to trigger the capturing of the plurality of videos of the target area.
8. The method of claim 7 , wherein the electric signal is produced by one of an accelerometer, a tachometer, a motor, a driver, and a hammer.
9. The method of claim 1 , wherein the target area includes an object and at least one of motion and vibration of the object is analyzed.
10. The method of claim 9 , wherein the synchronization reference is coupled to at least one of the object and a motion of the object.
11. The method of claim 9 , wherein the object is a rotating machine and the synchronization reference is a rotational phase of the rotating machine.
12. The method of claim 1 , wherein providing the synchronization reference includes providing video acquisition time stamps and calculating corresponding phase shifts at at least one frequency.
13. The method of claim 1 , wherein creating the composite video comprises digital composition of frames of the plurality of videos.
14. The method of claim 1 , further comprising providing a time delay between the synchronization reference and the plurality of videos.
15. A method for high-rate video acquisition, comprising:
providing a synchronization reference;
capturing a plurality of videos of a target area;
and creating a composite video from the plurality of videos of the target area;
wherein the plurality of videos each capture a different part of the target area or the plurality of videos each capture the entire target area;
wherein, when the plurality of videos each capture a different part of the target area, the plurality of videos are synchronized to the synchronization reference; and
wherein, when the plurality of videos each capture the entire target area, the plurality of videos are synchronized to the synchronization reference but are each offset by a variable delay;
wherein providing the synchronization reference includes providing a moving reference object, recording the moving reference object concurrently with the plurality of videos, and extracting the synchronization reference from the recording of the moving reference object, and/or
wherein providing the synchronization reference includes providing a video sensor, providing a moving reference object, recording video of the moving reference object using the video sensor concurrently with the capturing of the plurality of videos, and extracting the synchronization reference from the recorded video of the moving reference object.
16. The method of claim 15 , wherein the target area includes an object and at least one of motion and vibration of the object is analyzed.
17. A computer program product, comprising a computer readable hardware storage device storing a computer readable program code, the computer readable program code comprising an algorithm that when executed by a computer processor of a computing system implements a method for high-rate composite video acquisition, the method comprising:
capturing a plurality of videos of a target area, wherein each video of the plurality of videos captures a subset of the target area;
providing a synchronization reference, wherein the synchronization reference is provided by: a) providing a moving reference object, recording the moving reference object concurrently with the plurality of videos, and extracting the synchronization reference from the recording of the moving reference object, and/or b) providing a synchronization video sensor, providing a moving reference object, recording video of the moving reference object using the synchronization video sensor concurrently with the capturing of the plurality of videos, and extracting the synchronization reference from the recorded video of the moving reference object;
synchronizing the plurality of videos using the synchronization reference; and
creating a composite video from the plurality of videos of the target area.
18. The computer program product of claim 17 , wherein the target area includes an object and at least one of motion and vibration of the object is analyzed.