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| 1. 2-D Fit determines beam centroid, width, and intensity | |
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| 1. TIFF files are roughly 0.5 MB per image, plain text is roughly 3.5 MB per image 1. Normal file compression (zip compression in OS 10.5) compressed files to roughly 1/4 their original size 1. At above rate of archiving and ~15 cameras per site, this is ~90000 images for one month and another ~67000 images for each following month. To fit a year's worth of data (~827385 images) on a 1 TB drive, this requires that each image be compressed to ~1.2 MB. Thus, the basic TIFF format is reasonable but could likely be improved upon. |
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| 1. 2-D Fitting is too slow, center of mass method easily fast enough but may not be accurate enough 1. Need to look into EPICS control methods |
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Outline for July Progress Report (6/30/08): attachment:Eric_Mintun_LIGOSURF_ProgressOutline_063008.pdf Presentation for 9/5/08 ISC meeting: attachment:CameraEvaluation.pdf |
1. Make GigE camera(s) work: full resolution, high dynamic range (all the bits), lower frame rate.
- Explore required network bandwidth: how many GigE cameras can we have on single hub?
- Some image processing: beam sizes, beam centroids, total power, diffs,...
- 2-D Fit determines beam centroid, width, and intensity
- Image archiving: 1/sec for the past 5 minutes, 1/minute for the past day, 6/hour forever
- Image compression? Just record the diffs?
- TIFF files are roughly 0.5 MB per image, plain text is roughly 3.5 MB per image
- Normal file compression (zip compression in OS 10.5) compressed files to roughly 1/4 their original size
- At above rate of archiving and ~15 cameras per site, this is ~90000 images for one month and another ~67000 images for each following month. To fit a year's worth of data (~827385 images) on a 1 TB drive, this requires that each image be compressed to ~1.2 MB. Thus, the basic TIFF format is reasonable but could likely be improved upon.
- Use TM spots to do auto-alignment.
- 2-D Fitting is too slow, center of mass method easily fast enough but may not be accurate enough
- Need to look into EPICS control methods
- Port Josh's beam scan stuff to use these cameras.
- Buy more cameras.
Subpages
Presentation for 6/27/08 ISC meeting: attachment:DigitalCameraStatus062708.pdf
Outline for July Progress Report (6/30/08): attachment:Eric_Mintun_LIGOSURF_ProgressOutline_063008.pdf
Presentation for 9/5/08 ISC meeting: attachment:CameraEvaluation.pdf