[wptabs style=”wpui-alma” mode=”vertical”] [wptabtitle] GETTING STARTED [/wptabtitle]

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A current version of EPSON Scan Utility software can be freely downloaded from the Epson website and used to scan a variety of media, including transparent film and photographic prints.

Epson 10000XL Flatbed Scanner

To get started, make sure the scanner is connected to the computer and turn both the scanner and computer on. Log in to the computer and start the EPSON Scan software.

1. Mode – In the EPSON Scan dialog (Figure 1), change the “Mode” to “Professional Mode.”

2. Media – If scanning transparent film media, choose “Film” in the “Document Type” drop-down menu. If scanning paper, prints, or other reflective type media choose “Reflective.”

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[wptabtitle] SETTINGS [/wptabtitle] [wptabcontent]

3. The “Document Source” should always be set to “Document Table.”

4. In the “Image Type” drop-down menu, choose the appropriate setting for the media you’re scanning.
-When scanning transparent film media we recommend using a 16-bit Grayscale (for B&W film) or 24-bit     Color (for color natural or false color film).

Figure 1: Settings for scanning with EPSON Scan software

5. Choose a resolution that is appropriate for the media you’re scanning.

–   When scanning transparent film media we recommend using a minimum resolution of 1200 dpi
–   For high quality film, we recommend using 2400 or 3200 dpi in order to capture all of the available     detail contained within the film
–   When scanning print or paper media, a scanning resolution of 300-350 dpi should capture all of the     available detail contained within the print.

6. Un-check the “Thumbnail” check box.  All other settings in the EPSON Scan dialog will depend on the media you’re scanning, or on your personal preference.

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[wptabtitle] SCANNING [/wptabtitle] [wptabcontent]

Figure 2: Transparent Film on Scan Bed

7. Placement – Carefully place the media face down in the upper left corner of the scan bed (Figure 2). We recommend using clean gloves when handling transparent film or print media.

8. Click the “Preview” button at the bottom of the dialog and the scanner will begin scanning.

Figure 3: EPSON Scan software Preview

9. Once the preview scan is complete, the “Preview” dialog should appear (Figure 3). Use the Marquee tools to select the area of the media you would like to include in your scan. Be sure not to crop an image you plan on using for photogrammetry, and to include any visible fiducial marks.

10. Begin Scan – In the “EPSON Scan” dialog window, click “Scan” to start the scanning process.

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[wptabtitle] SAVING YOUR FILE [/wptabtitle] [wptabcontent]

11. In the “File Save Settings” dialog, choose a location, format, and name for output file.

NOTE: For best practice (and especially projects considering archival), we recommend scanning to the TIFF (.tif) file format.

12. Time – Depending on the size of your media and the resolution you chose, the scanning process could take up to 1-2 hours.

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3D View of DEM Overlaid With 3D Breaklines

Close Range Photogrammetry:

Typical deliverables created as the end result of a CRP project could include 2D vector graphics (planimetric or elevation type CAD drawings), dense point clouds, 3D polylines, facetized models (mesh) of an object or surface, and raster graphics such as rectified or fully orthorectified images. Each deliverable created should include appropriate metadata for each of the above mentioned steps, as well as metadata for the additional processing performed to create the final file.

Because the diversity of possible end products and software packages associated with photogrammetry, it is difficult to specify the metadata required. We recommend using the ADS Guides to Good Practice to identify the appropriate metadata for your specific file. Below is a list of ADS Guides and the file types they should be used for:

2D CAD drawings and 3D vectors: http://guides.archaeologydataservice.ac.uk/g2gp/Cad_Toc
3D point clouds and facetized models (mesh): http://guides.archaeologydataservice.ac.uk/g2gp/LaserScan_Toc
Raster images: http://guides.archaeologydataservice.ac.uk/g2gp/RasterImg_Toc

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Low Altitude & Aerial Photogrammetry:

A discussion and comparison of file export formats is currently being developed. Please check back soon! And in the meantime, please see the ADS Guides to Good Practice regarding Aerial Survey for detailed information regarding documentation and standards.

Aligned Images in PhotoScan

In order to extract three dimensional points from two dimensional images, it is necessary to perform a triangulation with at least two images (a stereo pair). When more than two images are used in a triangulation, we refer to the group of images as a ‘block’. To perform a triangulation, we must measure a sufficient number of tie, control, and/or check points throughout the block. Constraints may also be placed on certain sets of points to enforce angular, linear, and/or planar properties. Once a triangulation is successful, image exterior orientation parameters (along with estimate for accuracy) should be available to the user. These are important pieces of information for downstream deliverables and should be documented. The table below describes the appropriate documentation for this process. Download a printable form in PDF format here or in a spreadsheet (.xlsx) format here.