Fastec IL3, Руководство оператора

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IL3 User’s Guide
page 40
11S-3002B
4-13 Saving Images to Mass Storage
Image sequences may be saved as CAP files (proprietary raw format, see “Appendix L: Partition
Capture (CAP) File Format” on page 96), as AVI videos, in which one file contains all the frames
of the sequence, or TIFF, JPEG, or BMP stacks, which are collections of files, one file per frame of
imagery. The file save options change depending on whether or 8-bit or 10-bit image data has been
written to internal high-speed memory:
10-bits recorded 8-bits recorded
TIFF (8-bit M /24-bit C) or RAW TIFF (16-bit) TIFF (8-bit M / 24-bit C) or RAW TIFF (8-bit)
DNG (16-bit raw format) DNG (8-bit Raw format)
BMP (8-bit M /24-bit C) BMP (8-bit M/ 24-bit C)
AVI (8-bit M /24-bit C) AVI (8-bit M / 24-bit C)
JPEG (8-bit M /24-bit C) JPEG (8-bit M / 24-bit C)
CAP (10-bit raw format) CAP (8-bit Raw format)
Calculating file sizes for TIFF and BMP images is very simple:
Resolution x Bit depth/8 = approximate BMP or TIFF file size in Bytes
(to convert Bytes to KB divide by 1024)
For example a 1280 x 1024 Mono BMP or TIFF is:
1280 x 1024 x 8 / 8 = 1,310,720 bytes = 1,280K
A 1280 x 1024 16-bit RAW TIFF/DNG is:
1280 x 1024 x 16 / 8 = 2,621,440 bytes = 2,560K
CAP files are always the size of the current buffer (session size).
The actual file size of a 1280 x 1024 mono BMP or TIFF is about 1281K (the additional 1K for the file
header). The actual size of 16-bit RAW TIFF is 2561K (again add an additional 1K for the header).
Note: The RAW 16-bit TIFF saved from the camera actually has 10 bits of image data. The 16-bit
format is used for compatibility reasons.
Calculating file sizes for AVI and JPEG images is much more difficult. The compression is often
approximately 10x to 20x, but it can be much greater for images with little content, and it can be
much less for very complex images.
RAW images are not colorized, so Mono and Color images are the same size. Colorization increases
file size 3x because 8 bits are saved for each of red, green, and blue channels.
To Save a recording to a connected mass storage device on the IL3:
1. Make a recording and establish the Start Clip and End Clip points you wish to use (see “4-10
Reviewing Captured Imagery: Playback” on page 34).
Note that the frame numbers initially shown in the dialog box will be the actual start and stop
frames for the entire capture
unless
the Start Clip and End Clip bumpers have been moved. If you are
not sure what the actual beginning and end frame numbers for the clip are, you can find them on
the far left / far right sides of the Clip bar.
Table 4-4: Image File Save Options