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Introduction


This system was designed to digitally photograph entire Petrographic Thin Section samples in both cross-polarized and single (plane)-polarized states. Microscopes do not have a field of view wide enough to image the entire specimen. The PICAT (Petrographic Image Capture and Archival Tool) provides an easy and versatile imaging process that captures a publication-quality image (8 x 10 inches at 300 DPI) within seconds rather than minutes.

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1.

Start the IODP Image Capture software and login using LIMS username and password. Under the Settings menu, select the Thin Section Mode.

2.

After software log-in, the upper left corner displays a list of images that were just taken (JPG files). Click on one of the images to select it for processing.

3.

Associate this image with a sample:

–Click on the Browse button.
–Select a site/hole to select a sample (default type = Thin Section [TS]).
–Select a sample from the list and return to main window.

4.

Once a sample has been selected, the sample text_id field populates and a new label is generated in the top right that indicates the new filename, based on the sample selected. If multiple pictures were taken of the same sample, the filename is appended with _2, _3, _4, etc., based on the number of previous images taken and processed.  Fill out the rest of the values based on the conditions when the image was taken.

5.

Click Upload to open a window indicating the upload status. When the upload process is finished another dialog box will appear indicating that the process is complete

6.

Once uploaded, the selected image is removed from the pending uploads list and loaded into LIMS. Continue processing additional images.

7.

After upload, the images are moved to the archive folder (at the same level as the capture folder). Under the archive folder are 3 subfolders:

–JPEG
–TIFF (not generally created in standard workflow)
–RAW

8.

These folders contain a hierarchy in the form of \{Expedition}\{SiteHole}\filename.ext of all the files (essentially, images are organized by type, expedition, and site-hole when stored in the archive folder). These images do not need to be backed up (as they are already in LIMS/ASMAN) but can be selected by the photographers, etc., for alternate archiving if desired.

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