• Image-Based-Modeling

Clear message

1st Annual PRI Workshop on Image-Based Modeling and Navigation for Space Applications

• June 6-8 Short Course

Welcome to the 1st Annual RPI Workshop on Image-Based Modeling and Navigation for Space Applications. This is a persistent webpages (will continue to exists after the training) that contains the information you need to get ready and the lesson info.

---

Goals

• Bring the students to the "SPC Training Level 2" TrainingLevels

  • Provide enough SPC hand-on skills that basic shape models can be built
  • Provides enough background so that additional practice and instruction can occur
  • It will be insufficient to fully train new personal to a level in which they could run an entire mission without support
• Specific things to learn
  • Be able to create landmarks and add images
  • Basic trouble shooting and fixing mis-registration
  • Perform tiling (both globally and BIGMAP)
  • Do iterations
  • Run residuals, geometry
  • Register images to shape model or maps
  • Autoregister
• Practice. A key component of this training is to practice. The practice allows for key concepts to become understood at a sufficient level to allow for more advanced concepts to make sense.

---

Student Prep

Because class time is limited, it is important to get the software and data installed before you show up to the conference. I will be available during the conference to help troubleshoot problems and help get your system functional before the class starts Wednesday morning. Once the class starts, I won't be able to ignore everyone else in the class to fix an install.

To maximize your learning in the class, I provide some information that will be beneficial to review.

• Stuff to read (links below)
  • Gaskell's 2008
  • Palmer's 2016, sections 2.4 and 5

Required Tasks To Complete Before Class Starts

• Sign the Licensing Agreement. This must be on file before the software can be distributed. //Complete//
• Download SPC software -- encrypted link will be sent only to class attendees

• Compile and install SPC. https://oort.psi.edu/public/1a09b8/dl/spc_v3.1B2.zip (password will be sent via a separate email)

  • Installing SPC Instructions

• Download sample data. The data volume is large, so it is important to do it ahead of time. Some of the files need to be expanded and moved.

  • Starting directory & SPICE (600MB)

    • You can put this directory anywhere (called topSPC). It is the base directory for the SPC work.

    • https://oort.psi.edu/public/98a344

    • You can go into the topSPC/ORex/DATA directory and uncompress the files using "gunzip *.gz"
  • Images:

    • I've broken them up into two parts to make them easier to download and compressed them. These <filename>.DAT files need to be moved into the topSPC/IMAGEFILES directory.

    • Approach (300MB): https://oort.psi.edu/public/1b733b

    • Preliminary Survey (1GB): https://oort.psi.edu/public/d0e1ec

    • You can uncompress the files using "uncompress *.Z"
  • Support Tools:
    • Over time, I have found that there are many nice helpers for SPC that do well if organized into its own area. They include scripts, programs and image lists. I've included some here. I suggest putting these two directories in /opt/local/spc/

    • https://oort.psi.edu/public/67588b

Extra software that is useful

• Software - Please load the following

  • MacPorts - http://www.macports.org/install.php

  • gnuplot - Installing using MacPorts, "sudo port install gnuplot"

  • imagemagick Installing using MacPorts, "sudo port install ImageMagick"

  • GraphicConverter -- http://www.lemkesoft.de/en/products/graphicconverter/

• SPC tools - This is a suite of tools that make measuring pixel/line locations and offsets easier. This is not required and class time won't be used for installing this. Install instructions are coming soon
  • apache -- The is installed as default for most UNIX (and Mac) systems.
  • spc_tool javascript libraries
  • updateDisplay.sh - script to convert SPC output to a web-accessible format

  • How to install and run - SPC-GUI-tools

---

Day 1

• Introductions
• Discussion of the Wiki/User’s manual

• Unix file layout and paths -- File System Setup

  • executables
  • source code
  • helpers
  • scripts
  • support
• SPC files
  • working
  • mapfile/landmark files
  • kernels
  • images
• Show Theory of SPC

Day 1 Practical - It's all about LITHOS

• Topics
  • display landmark
  • landmark management
    • create
    • delete
    • rename
  • images
    • add images
    • remove images - auto and manual
    • select useable, correlation and manual
    • adjust image position, auto, manual
  • global shift
  • build template
  • find height
    • options

The core of SPC is lithos. That tool lets you create landmarks, associate images, align images, determine the 3D position of the landmark and create topography.

Fixing landmarks, using Input landmark

• START1 - nominal

• START2 - simple autoalign Align landmarks

• START3 - align with an images Align landmarks

• START4 - manually align a single image Align landmarks

Building a landmark Create new landmark and How To Build A Landmark

• Name: START5
• Lat/Lon: -10/350
• Res: 0.001
• Q-size: 49

Template

• START6 - using correlation and template Find template

Topography

Once all the images are aligned (the center pixel of every image is at the exact same feature of the surface), then you can build topography using photoclinometry with some conditions. Find heights

toposcript

State

A key diagnostic tool for SPC is understanding the state of the system. By state, I mean what are the conditions (the health or quality) of the landmark. There is no one parameter that tells you all of this, but it is looking at a wide set of details that tells you if there are problems.

See Notes from day 1

Tile 120

Tiling is the process of batch creating landmarks in a systamatic order around the surface. Unlike "features", which I use to describe regions of the surface that is selected because of its topographic characteristics, landmarks cover the surface at a set interval to create an overlapping grid over the surface.

• make_scriptT.in

• scripts/XXX120.seed -- make_scriptT.seed

• make_scriptT

• sh run_script.b

• find_nofit

• TESTFILES, TESTFILES1

---

Day 2

New files for today

• Raw FITS Images
  • Copy these to topSPC/ORex/NEW_IMAGES/
• Updates to support files
  • Copy these to /opt/local/spc/rpi/support

First - let's clean some of the landmarks from lastnight

• FP0001
• GL0001
• GL0002
• ER0001
• EQ0001
• FQ0002
• EO0001
• FB0001
• EA0001

Let's talk about images

• Converting images into SPC format

  • process_fits

  • make_sumfiles.in

• Converting geometric information into body-fixed frame

  • make_sumfiles

• Each images should be aligned with the shape model at a course level.

  • register

    • Practice - P596677257F2

    • Batch

      • Clear out old TESTFILES and TESTFILES1

        • rm TESTFILES*/*

      • make_script.in

        • This must be created from the new list of images
        • Make a file of new image names and write them into make_script.in (with a proceeding space and the last line "END")
      • ln -s scripts/make_scriptR_01.seed make_scriptR

      • make_scriptR

      • sh run_script.b
      • find_nofit
• Review metadata and data files

  • IMAGEFILES

    • format -- 8bit, 16bit, 32bit

  • NOMINALS

  • SUMFILES

  • make_sumfiles.txt

  • INIT_LITHOS.TXT

• Batch associate existing landmarks to new images

  • When you bring in new images, they have no landmarks. While you can add them into landmarks using lithos, that is not very productive. Thus, we use a program autoregister that loads all of the landmarks into the image you are working with.

  • autoregister

    • make_lmrklistX

    • Practice - P596677257F2

  • Batch

    • make_script.in -- This must be created from the new list of images

    • ln -s scripts/make_scriptA.seed make_scriptA.seed

    • make_scriptA

    • sh run_script.b
• Iteration
  • Setup

    • make_lmrklistX

    • cp LMRKLIST.TXT LIST.TXT

    • duplicates

    • ln -s <whatever> make_scriptP.seed

    • make_scriptP > run.sh

  • Running
    • sh run.sh
  • Evaluation
    • find_nofitP

Build a shape model

• ICQ format

• densify

• dummer

• buildShape.sh - runs all of the commands as needed

Create a higher resolution

• Tile 75
  • Setup
    • ln -s make_scriptT_75.seed make_scriptT.in

    • make_scriptT

  • Running
    • sh run_script.b

    • find_nofitT

---

Day 3

• Clean up from 75cm tiling
• SPC Technical Info - Gaskell
  • Discussion of SPC Design
  • Technical details
  • Issues and complexities
• Evaluation
  • RESIDUALS, *INFO

• <LUNCH>

• Tiling by BIGMAP
  • Making a bigmap
  • Criteria for size, scale
  • Setup
  • Running
  • Evaluation
• More evaluation
• Error evaluation
• Questions

---

Support Files