1. Increasing Image Transfer Speed In MSAT Through Image Compression David Elies Akimeka, LLC Advisor: Steve Schweibinz Mentor: Rob Reed

2. Overview Medical Situational Awareness in Theater NASA WorldWind Download speed and image compression DDS files Transparency Conclusions

3. Medical Situational Awareness in Theater (MSAT) Provides military medical decision makers with timely, relevant information Assembles information from multiple sources Allows users to view exactly the data they need Can use existing and future data sources

4. NASA WorldWind Global visualization software Similar to Google™ Earth Open Source

5. NASA WorldWind

9. Slow Image Downloads

10. Increasing Transfer Speed by Decreasing File Size

11. Images are 512 x 512 pixels

12. Increasing Transfer Speed by Decreasing File Size Images are 512 x 512 pixels.dds compressed file size – 256KB

13. Increasing Transfer Speed by Decreasing File Size Images are 512 x 512 pixels.dds compressed file size – 256KB.jpg compressed file size – 24KB

14. Decoding the.dds file format example.dds

15. Decoding the.dds file format Binary 01000001010010110100 00010100110101000001 01001001001000000100 10010100111001010100 01000101010100100100 1110 example.dds

16. Decoding the.dds file format Binary Consists of: Header Body Header example.dds Header

17. Decoding the.dds file format Binary Consists of: Header Height Width Pixel format Compression type indicator example.dds Header

18. Decoding the.dds file format Binary Consists of: Header Body Image pixels Data example.dds Body

19. Converting the.dds file format.dds file is read Image is created in memory.jpg file is created 01000001010010110100 00010100110101000001 01001001001000000100 10010100111001010100 01000101010100100100 example.dds 01100001011010110110 10010110110101100101 01101011011000010010 11000010000001101100 0110110001100011 new.jpg

20. Transparency

21. .dds files use transparency

22. Transparency.jpg files do not

23. Transparency Recognize formerly transparent pixels (by color)

24. Transparency Recognize formerly transparent pixels (by color) Convert back to.dds, using transparency for specified color

25. Transparency Transparent color may be part of image as well.

26. Transparency Transparent color may be part of image as well Transparent pixels may be different colors

27. Conclusions.dds images can be transmitted as.jpg Transmission time was decreased Transparency was mostly preserved Some image quality was lost, but loss is negligible What is the impact on processing speed? Can we convert files directly w/o intermediate steps? Can we guarantee proper handling of transparency?

28. Acknowledgments Akimeka, LLC Akamai Workforce Initiative Deanna GarciaLani Lebron Steve Schweibinz Lisa Hunter Rob Reed The rest of the MSAT team Akamai Instructors Maui Community College Nina Arnberg Mark Hoffman Mike Nassir Jung Park Dave Harrington Elizabeth Reader Mike Foley Mark Pitts The 2009 Maui Akamai Internship Program is funded by the University of Hawaii, the Department of Business, Economic Development, and Tourism, the National Science Foundation Center for Adaptive Optics (NSF #AST - 9876783).