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Flight Software Image Compression and Status

Flight Software Image Compression and Status. Dennis Wang Interferometrics/NRL SECCHI Flight Software Lead Paris Mar 5-9, 2007. Image Processing. FSW 5.01.05 has 129 different possible image processing steps Image Compression Rice H-compress (12 sets of parameters)

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Flight Software Image Compression and Status

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  1. Flight Software Image Compression and Status Dennis Wang Interferometrics/NRL SECCHI Flight Software Lead Paris Mar 5-9, 2007

  2. Image Processing • FSW 5.01.05 has 129 different possible image processing steps • Image Compression • Rice • H-compress (12 sets of parameters) • ICER (12 sets of parameters) • Binning • Arithmetic (SQR, DIV2, DIV3, DIV4, Poisson Recoding, 32bit->16bit) • Exposure Adjustment • CME Detection • HI high/low word compression • SSR1, SSR2, SWB, Realtime channel selection

  3. ICER • Wavelet Image Compression by JPL used by the Mars Exploration Rover • Features • Ability to set byte quota • Segmented to curtail data loss in event of packet loss • Better error characteristics than H-compress • More CPU time than H-compress or Rice • Capable of lossless compression

  4. COR1 ICER at Launch

  5. COR2 ICER at Launch

  6. EUVI & COR1Space Weather Beacon

  7. COR2 Space Weather Beacon

  8. HI-1 Space Weather Beacon

  9. HI-2 Space Weather Beacon

  10. Space Weather Beacon

  11. Image Processing Commissioning • Image processing • Image summing (sum 3, 4 or 5 images onboard) • CME detection algorithm and testing • Different threshold table for A and B • Actual COR2 images used to generate threshold table • Masking of threshold table • Lossless image and same image via SWB or ICER • Tested Disabling of SSR2 twice • Total Brightness SWB COR1 and COR2 images for SWB • HI space weather (32 bit -> 16 bit conversion)

  12. Image Scheduling Commissioning • Image Taking and Processing Experiments • EUVI 10sec cadence sequence of 60 images • Inflight Rice and ICER compression images • Image Scheduling • Light travel time table • ATS and RTS Schedule blocks

  13. FSW Bugs and Enhancments since Launch • FSW 5.01.05 • Image Processing - HI high/low word compression • Header image dimensions for CCD-binned, trimmed image fixed • FSW 5.01.00 • HI cosmic ray scrub • use photon noise as 1 sigma and adjust scrub in sigma • Choose 1,2,3,4 or 5 sigma as scrub criteria • HI Cosmic Ray Report relocated to end of image • Simultaneous HI and SCIP image taking

  14. Issues and Requests • 3/1/2007 synoptic schedule with 7476 exposures is skipping images, smaller schedule with 5487 exposures seems to be OK • Cadence too fast ? • CPU overloaded ? • Campaign mode limit ? • 1/25/2007 SECCHI-A rebooted • Watchdog timer • 38 days since power-on • Manual Recovery at next pass • Photon Transfer curve readout tables • Needs work • 1088x1024 image • 2176x2048 image

  15. Enhancements • On-board composite images • Save TM by modifying IP to make composite images • EUVI thumbnails in COR1 or COR2 corners ? • EUVI thumbnail in COR1 occulter ? • Image processing • Only 20 image processing steps per image • Only 100 rows in the image processing table • Low TM rate Operations

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