Last edited on 2009-01-30 03:05:03 by stolfi

Processing the IAB-2002 fragment pictures
01 - Image descriptions and the "RAW" directory

IMAGE DESCRIPTIONS

  Images of fragments from the Caju-1 site were taken at IAB by HCGL
  starting on august/2002.  
  
  Images were taken with a Sony Mavica CD300 camera, recorded on 156 MB CD's.
  
  Typically a batch of fragments was placed on a stand, possibly with
  test targets, and photographed with several lighting fields,
  viewpoints, and fragment poses.
  
  The images taken on a given day were recorded in one or more CD. The
  camera saves the images with names DSC{NNNNN}.JPG where {NNNNN} is an
  automatically incremented 5-digit serial number. The numbering is
  continuous through sessions but occasionally the camera counter was
  reset by the operator.
  
  Each CD was manually labeled with the date ({YYYY}-{MM}-{D}) and, on days
  when more than one CD was created, also a serial digit {C} (1,2,...)
  The raw Mavica CDs were then copied on ordinary 600MB CDs for backup,
  and then copied to hard disk, under names

    RAW/{YYYY}-{MM}-{DD}-{C}/DSC{NNNNN}.JPG

  These CDs were processed so far:
  
    2002-06-27-1
    2002-08-12-1
    2002-08-20-1
    2002-08-29-1
    2002-08-30-1
    2002-08-30-2
    2002-09-10-1
    2002-09-12-1
    2002-09-20-1
    2002-09-26-1
    2002-10-01-1
    2002-10-07-1
    2002-10-21-1
    2002-10-24-1
    2002-10-31-1
    2002-12-10-1
    2002-12-12-1
    2002-12-12-2
    2003-01-31-1
    2003-02-03-1

  There was a directory "2002-08-30-0" but it was just a copy of some
  images from 2002-08-30-1, and it was deleted.  The old directory
  2002-08-29-0 was replaced by 2002-08-29-1.  The old directory
  2002-09-11-0 was replaced by 2002-09-10-1.
  
CREATING BROWSE VERSIONS OF RAW IMAGES

  The raw CD300 images are 2048 x 1536, rather uncomfortable to handle
  and view.  The script "tools/make-small-versions" created smaller versions
  of each image {F}.JPG, in the same directory:
  
    {F}-s.JPG, 1/4  linear size, 512 x 384
    {F}-e.JPG, 1/4  linear size, 512 x 384, normalized
    {F}-i.JPG, 1/32 linear size, 64 x 48

  Listing all images in the RAW directory:
  
    find RAW -type f -ls \
      | gawk '//{ printf "%10d %s\n", $7,$11; }' \
      | sort -b +1 -2 \
      > .rawimages