FEI Quanta FEG 250, User'S Operation Manual

Page: 94 / 228

Operating Procedures: Capturing and Handling Single Image
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there is no reason to save an image with a higher bit and color depth
than available in an original one. Over against saving an image with a
lower bit and color depth than available leads to the loss of
information. The message is displayed in this case onscreen.
• The TIF 8 / 16 – greyscale image type
• The TIF 24 file – color image type
TIF file contains active processing information, which could be
utilized for a databar setting (see the
Preferences… / Databar tab).
• The JPG file is a compressed file format employing a lossy
compression algorithm resulting in the small file size with a little
loss of information, depending on the particular image appearance
and the compression level (factory preset to 80%). The 8 / 24 bit
depth is automatically selected when saving the greyscale / color
image file.
• The BMP file is an uncompressed file format. The 8 / 24 bit depth is
automatically selected when saving the greyscale / color image file.
SAVING / OPENING / PRINTING
The following universal file handling functions could be used:
• Save (Ctrl + S) stores the image to the predetermined location
with the last used filename including an incremental number.
• Save As… opens a dialogue for saving images (this provides an
opportunity to change the file name, its location, and the possibility
to save also Databar and overlaid graphics). Both functions can be
linked to the Snapshot / Photo function (see the
Preferences… /
Scanning tab).
• Save All... behaves the same way as Save As functionality, but
enables to save images from all four quads at once.
• Open… opens a single image file into the selected quad. The
dialogue displays, by default, the location used in the last Save
As… utilization.
• Print… (Ctrl + P) opens the printer setup dialogue so that the
choice of printer and settings can be established to print the
selected quad. Clicking the OK button in the printer setup dialogue
activates the printer to print the job.
Image Capturing Procedure
1. Select the area of interest and set the Magnification , the Scan
condition , the image pixel Resolution and the Databar
informations that are required in the saved image.
2. Make the best image using any suitable method you are familiar
with.
3. Use the Pause (F6) / Snapshot (F4) / Photo (F2) / Active Preset
Snapshot (Ctrl + F2) function. The scan makes one screen / quad
pass (or several passes when the number of integrated frames is
larger) and pauses.
4. The image can now be saved by
File menu / Save (Ctrl + S) / Save As… / Save All… functions.
Image Printing Procedure
1. Select the area of interest. Set the Magnification , the Scan
condition , the image pixel Resolution and the required databar
informations.
2. Capture the image or open a saved one.
3. Click the File menu / Print… (Ctrl + P) , a print dialog appears.
4. Complete the print setup and click the OK button.