# Last edited on 2025-08-01 17:32:00 by stolfi
# 078 Analyzing the rusty stains on f103v

  There are four conspicuous stains around the transition from quire 19 to quire 20: 
    
    RustyA at the NE corner of panel/page f100v.
    RustyB at the NE corner of panel f101v1, right half of logical page f101v.
    RustyC at the NE corner of panel/page f102v1, 
    RustyD at the NE corner of panel/page f103v.
    
    GreenA along the top edge of panel/page f103r.
    
  This note analyzes the stains and their implications. See the report in
  file "report.html".
  
SETUP

  mkdir images
  ln -s ../work
  ln -s work/error_funcs.gawk
  ln -s work/FromBeinecke

GETTING THE IMAGES

  Built a table "images/clipped/clip-list.txt" with the panels of quires
  19 and 20 in bookworm chewing order, with orientation bit and reference 
  positions of the Rusty and Greeen stains.  The table was built bu
  displaying the page images
  
    display_pages.sh 01 42 &
    
  then obtaining the relevant coordinates with gimp, and entring them by
  hand in the table.
  
  Create convenience links for the images in bookworm chewing order:
  
    create_full_panel_links.sh
    
  Create annotated versions of the full panel images:
  
    annotate_full_images.sh Rusty
  
  Clipped the relevant portions of the Beinecke 2014 scans:
  
    make_stain_clips.sh Rusty 01 20 1100 800 1040  50
    
  See images
  "{NN}-{R}-{FNUM}.png", in folders "images/clipped/Rusty" and
  "images/clipped/Green", where {NN} is the sequence number of the clip
  in bookworm gnawing order (f99r = "01", etc), {R} is 0 for normal
  orientation and 1 for LR-flipped, and {FNUM} is the f-number of the
  panel (NOT of the logical page).
  
  To better analyze the seeps, the verso clips were flipped
  LR. See links/images in "images/sorted".  Creating them:

    ( cd images/sorted && make_sorted_clips.sh Rusty )
    
REPORT

  Wrote a report "report/report.html" on this investigation.
  The "Green" part is still missing.
  
TO DO

  Analyze the "Green" stains:
  
    annotate_full_images.sh Green 
  
    make_stain_clips.sh Green 01 42  800 980  400  40
  
    ( cd images/sorted && make_sorted_clips.sh Green )