4SM license policy

Table Of Content

1. THEN WHAT? 4SM license policy
2. SUPER USER
3. RESPONSIBILITY
4. LICENSE POLICY SUMMARY
5. EXAMPLE of  license key
6. HOW DOES IT WORK?
7. PREAMBLE
8. WARRANTY
9. EXECUTABLE CODE
10. LICENSE
11. CHECKING THE LICENSE
12. IMAGE LAYOUT
13. LICENSE COST
14. LICENSE REGISTRATION
15. TOLERANCE
16. SEA TRUTH
17. DISSEMINATION
18. OPERATIONAL LICENSING PROCESS
19. SubImage

  Then what?  

4SM shall accept to process for free any multi/hyper-spectral image you may want to try, except for equalizing, deglinting and modeling

This means that you can run your calibration and your sea truth evaluation, 
ahead of any actual modeling of your image

Then if/when satisfied with your Calibration and Command Line, 
you shall have to purchase the License key 
for final equalizing/deglinting/modeling of your image

RESPONSIBILITY

As the 4SM practitioner, 
the purchaser of a 4SM license takes full responsibilities  
over all aspects of the output of his work using the 4SM software

  4SM license policy summary

• Current 4SM executable code may be downloaded http://pws.prserv.net/RSP.4SM/
• All of its functionalities are enabled.
• 4SM shall process for free any imagefile that is square and contains <=100000.001 shallow pixels.
• For a bigger file, a paid-up internal_4SM_licensekey must be incorporated into 4SM code.
• From then on, current 4SM shall process any imagefile whose content matches that licensekey.
• And further versions of 4SM shall keep doing so for one year after date of issue.
• This also means that the owner of this licensed_imagefile may copy it, or any subset of it, along with the corresponding commandline_licensekey, to any third party without any restriction on my part: 4SM shall accept to process it, and further versions of 4SM shall retain that capability for one full year.

Example of 4SM license key

  4SM license key, how does it work?

4SM does not check for or require any License Key,
until the operator launches runs the Equalizer, the Deglinter or the Modeler

• FREE CHEQUERED : 
  • this means that all 4SM functionalities are enabled for any image 
    • apart from Equalizing, Deglinting or Modeling.
  • this means that you can calibrate/sea-truth your image thoroughly without any restriction:
    • and then process it as a chequered image
  • ==> see for yourself wether it is worth paying for the cost of the license.
• FREE SMALL: 
  • if the image is square and has less than 0.1 MillionShallowPixels, then no License Key is needed at all
  • that's about a 300*300 image.
• ELSE    ==> 4SM shall issue a License Key and proceed to write a chequered image.

PREAMBLE

• 4SM is still under development. 
• At this stage, its source code has not been consolidated by any professional programmer: ~40,000 lines.  
• It is one single source code compiled by "gcc -lm -w  4SM.2.06.c -o 4SM.2.06"
• Should you experience any inconvenience in its use, please send a copy of your working image file to Yann MOREL, along with command line, etc, so that I hopefully shall be able to fix the problem for you. 

 DISCLAIMER

• 4SM is a supervised process. 
• By paying the price for a License Key, you acquire the right of use of 4SM on your own image. 
• All the privileges and responsibilities of the supervisor are transfered from Yann MOREL onto yourself. 
• You work on your own image under your own and exclusive responsibility. 
• By paying this price, you agree that Yann MOREL shall not be held responsible to any extent for your own work using 4SM.  

EXECUTABLE CODE 

• it is available for free at http://pws.prserv.net/RSP.4SM/4sm.zip for download
• or from rspfsm@attglobal.net, along with conditions for its use.

  LICENSE

• an image file is 4SM_licensed, worldwide and without any restriction
  • if it is square and has less than 0.100 MillionShallowPixels: no license key is needed
  • or if its required_license key has been purchased/incorporated into the 4SM executable
  • or if it is the subset of a registered_4SM_licensed_image file.

  CHECKING THE LICENSE

• At first attempt to running Equalizer, Deglinter or Modeler
• 4SM analyzes the image file and works out the required_license key details:
  • if the required_license key is found to be free, 4SM proceeds normally
  • else if a match is found with a command line_license key, 4SM proceeds normally
  • else if a match is found with an internal_4SM_license key, 4SM proceeds normally
  • else 4SM writes out and displays an image.lic text file, and proceed to write a chequered image.

 IMAGE LAYOUT

• Please, trim unnecessary void rows/columns out of image file
• MASK: 
  • Add one 8bits mask with desired ShallowPixels encoded to any value within the range 0<N<=NbBands. 
  • If no such mask exists, all image pixels shall be counted as shallow. 
  • Best is to mask 
    • all optically deep pixels at 240, 
    • all land pixels at 240, all 
    • nodata pixels at 239, 
    • so that only shallow pixels are actually counted for the calculation of the cost of the license.
• BANDS: 
  • Minimum three bands: 
    • G, R, Nir 
    • or B, G, R 
  • One NIR band is most useful
  • Four bands are OK: 
    • B, G, R, Nir
  • Hyperspectral: up to 20 bands at present: 
    • 10 to 20 bands, well located over the visible range, should suffice in order to derive a fairly detailed and reliable spectral bottom signature.
    • Please, do not underestimate the use of red bands
    • From 400 to 450 nm, radiometric quality can be very frustrating

 HOW LICENSE COST IS CALCULATED: see License calculator

• AreaFactor= sqrt ( nbRow* nbLin) / 1,000,000
• If nbLin==nbRow and AreaFactor<=0.100 ==> AreaFactor=0 ==> no licensekey is needed.
• If MillionShallowPixels< AreaFactor, AreaFactor= MillionShallowPixels
• BandFactor= sqrt ( NbBands).
• ==> LicenseCost=100*AreaFactor*BandFactor in US dollars.

 LICENSE REGISTRATION

• If a required_license key is needed, it must be added to the set of internal_4SM_keys
• Only the first 26 characters of the key are checked against image file content and layout. The end of required_license key is metadata.
  • the firts 26 characters only contain informations on 
    • the radiances of a selection of pixels: you should not modify them
    • the number of shallow pixels: you should not increase this in excess of 5%
    • the number of bands
  • this means that, once licensed,
    • you can rename your image as you like
    • you must stick to the original spectral image 
    • sorry, all you can do is 
      • reduce the number of MillionShallowPixels pixels as you like
      • or increase it by less than a 5% tolerance

 TOLERANCE

• If the content or layout of a licensed_image file_data_channels has been altered, chances are that 4SM shall not acknowledge a licensed image.
• As for the shallow pixels mask, it may be modified at will to the extent that the number of actual MillionShallowPixels does not exceed 105% of the LicensedMillionShallowPixels
  • once this limit is reached upon Modeling, Equalizing or Deglinting, 
  • then 4SM complains and exits

 SEA TRUTH

• If your image is registered to a quality sea truth dataset, I might want a copy of both that image and sea truth dataset.
• In exchange for a FREE LICENSE for another image file of similar size and layout, 
  • for exclusive purpose of further consolidation and commercial promotion of 4SM.

 DISSEMINATION

• A licensed_image file, or any of its SubImage siblings, may be copied by you to any third party without any restriction.
• Dissemination of licensed_image files by their owners is encouraged, as well as communication with rspfsm@attglobal.net
• In further versions of 4SM, I reserve the right of keeping an internal_4SM_key in the code for one year.
  • this means that further versions of 4SM, available for download from my website, 
  • shall keep accepting an internal_4SM_key until one year after date of issue.