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Introduction
The Ocean Drilling Program recorded the visual appearance of the
recovered drilled sediments and rocks with whole-core photography.
Those photographs exist as TIFF images in various data centres.
Recent developments in
software, such as Corelyzer, work with strip images of the core
recovery
placed on a track alongside measured and observed data. For IODP data
to work with these new systems, the whole core photographs must be
split into compatible image strips. The project described here devised
a method and
software for doing that task.
This web page shows some
outputs. The state of the
project is "Beta", and improvements to the software are being made and delivery
of the full image strip collection is being organized.
Project Report
These reports are available:
Technical report:
Display of example photos and
strips:
"http://instaar.colorado.edu/~jenkinsc/IODPimagestrips/Report/ImageStripDisplay_Apr09.pdf"
Poster of development at stage I:
"http://instaar.colorado.edu/~jenkinsc/IODPimagestrips/Report/ImageStrips2.pdf"
The Image Strip
Collection
The strips are organized by core hole, for example "0736A". Within
each core hole folder are processed files and reduced resolution /
greyscale copies of the
original TIFFs:
- _Work/
Contains all files used in the processing
- ./0736A
Folder per hole
- *_hole.dat
Corelyzer project import file (for latest Corelyzer version only)*1
- *_stripCAT.csv
Table suited to EXCEL, per hole, with metadata for each strip,
including error reports
- _cropCOLOUR.py
Program pr Hole to crop the full resolution colour TIFs, attach water
marks,
and allow for the scale-mark selvages for each strip
- ./0736A1H_Strips/
SubFolder with the Image Strips (for each core)
- *_gy.tif
Greyscale reduced resolution untrimmed strip
- *_gy_tr.tif
Greyscale reduced resolution trimmed strip
- *_co_tr.tif
Colour trimmed strip at resolution of original photo
- *_co_tr_sc.tif
Colour trimmed strip at resolution of original photo, with scale marks
- ./_Photos/
SubFolder with the Whole Core Photos (for Hole) *2
- *.tif
Photo image file as supplied by Data Archive
- ./_Cml
SubFolder with the Corelyzer XML frameworks
- *.cml
Corelyzer project per photo (i.e., core) with local URL
- <>*_wb.cml
Corelyzer project per photo (i.e., core) with web
type URLs
- ./_Work
SubFolder with miscellaneous outputs and diagnostics
- *.GY.tif
Greyscale reduced copies of the photos
*1: The TopOffset, BotOffset columns
in this file are redundant for Corelyzer.
*2: All TIFs in this folder will be
processed; those in sub-folders will not.
The primary program imgSTRIPS_*.py
is available on request. It is Python 2.5 and currently at version 15.
Several other Python scripts are used to to tidy up the project before
web delivery.
Delivery
of Strips
The full collection of IODP Image Strips will be
posted at a public site for general use.
For the present, these image strip sets are posted, with their .csv and
.dat listings.
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