Details
| Original language | English |
|---|---|
| Pages (from-to) | 254-259 |
| Number of pages | 6 |
| Journal | International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives |
| Volume | 36 |
| Publication status | Published - 2006 |
| Event | 2006 ISPRS Commission V Symposium on Image Engineering and Vision Metrology - Dresden, Germany Duration: 25 Sept 2006 → 27 Sept 2006 |
Abstract
The three-dimensional photogrammetric analysis of image sequences is a growing field of application. For the analysis of dynamic processes one important precondition has to be guaranteed: The cameras of the acquisition network have to be exactly synchronized, otherwise the results of the object point calculation are affected by asynchronism. In order to obtain synchronous image sequences different methods can be applied. These methods can be divided into three major groups: methods which use hardware components, methods which acquire asynchronously image sequences, but use a hardware component to register the asynchronism and correct the measurements via software in a post-processing step, and methods which acquire asynchronous image sequences and use software algorithms to correct the image measurements within the analysis. In this article a new method is presented, which can be assigned to the third group. In contrast to already existing methods the new approach has no restrictions concerning the number and the set-up of the cameras in the acquisition network. Furthermore, both the temporal and spatial analysis step are carried out simultaneously and are not divided into two separated parts. Due to these facts, the accuracy of the object point determination from image sequences is significantly improved in contrast to procedures which neglect the asynchronism. We have implemented the suggested method and have run a number of experiments in the context of vehicle impact testing. These tests confirm the theoretical expectations of the new method. Sequences with a frame rate of 1000 Hz observing an object with a speed of up to 7 m/s and an asynchronism of -0.79 ms were analyzed. The accuracy of the object point calculation could be improved by factor of 10.
Keywords
- Analysis, Spatio, Temporal, Tracking, Video
ASJC Scopus subject areas
- Computer Science(all)
- Information Systems
- Social Sciences(all)
- Geography, Planning and Development
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In: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives, Vol. 36, 2006, p. 254-259.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - Photogrammetric synchronization of image sequences
AU - Raguse, K.
AU - Heipke, C.
PY - 2006
Y1 - 2006
N2 - The three-dimensional photogrammetric analysis of image sequences is a growing field of application. For the analysis of dynamic processes one important precondition has to be guaranteed: The cameras of the acquisition network have to be exactly synchronized, otherwise the results of the object point calculation are affected by asynchronism. In order to obtain synchronous image sequences different methods can be applied. These methods can be divided into three major groups: methods which use hardware components, methods which acquire asynchronously image sequences, but use a hardware component to register the asynchronism and correct the measurements via software in a post-processing step, and methods which acquire asynchronous image sequences and use software algorithms to correct the image measurements within the analysis. In this article a new method is presented, which can be assigned to the third group. In contrast to already existing methods the new approach has no restrictions concerning the number and the set-up of the cameras in the acquisition network. Furthermore, both the temporal and spatial analysis step are carried out simultaneously and are not divided into two separated parts. Due to these facts, the accuracy of the object point determination from image sequences is significantly improved in contrast to procedures which neglect the asynchronism. We have implemented the suggested method and have run a number of experiments in the context of vehicle impact testing. These tests confirm the theoretical expectations of the new method. Sequences with a frame rate of 1000 Hz observing an object with a speed of up to 7 m/s and an asynchronism of -0.79 ms were analyzed. The accuracy of the object point calculation could be improved by factor of 10.
AB - The three-dimensional photogrammetric analysis of image sequences is a growing field of application. For the analysis of dynamic processes one important precondition has to be guaranteed: The cameras of the acquisition network have to be exactly synchronized, otherwise the results of the object point calculation are affected by asynchronism. In order to obtain synchronous image sequences different methods can be applied. These methods can be divided into three major groups: methods which use hardware components, methods which acquire asynchronously image sequences, but use a hardware component to register the asynchronism and correct the measurements via software in a post-processing step, and methods which acquire asynchronous image sequences and use software algorithms to correct the image measurements within the analysis. In this article a new method is presented, which can be assigned to the third group. In contrast to already existing methods the new approach has no restrictions concerning the number and the set-up of the cameras in the acquisition network. Furthermore, both the temporal and spatial analysis step are carried out simultaneously and are not divided into two separated parts. Due to these facts, the accuracy of the object point determination from image sequences is significantly improved in contrast to procedures which neglect the asynchronism. We have implemented the suggested method and have run a number of experiments in the context of vehicle impact testing. These tests confirm the theoretical expectations of the new method. Sequences with a frame rate of 1000 Hz observing an object with a speed of up to 7 m/s and an asynchronism of -0.79 ms were analyzed. The accuracy of the object point calculation could be improved by factor of 10.
KW - Analysis
KW - Spatio
KW - Temporal
KW - Tracking
KW - Video
UR - http://www.scopus.com/inward/record.url?scp=85009867106&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85009867106
VL - 36
SP - 254
EP - 259
JO - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
JF - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
SN - 1682-1750
T2 - 2006 ISPRS Commission V Symposium on Image Engineering and Vision Metrology
Y2 - 25 September 2006 through 27 September 2006
ER -