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QuickLook™
QuickLook™ is a client/server
solution that provides a scrolling display of imagery received
in realtime from an airborne or space-based sensor, with the
server designed to “plug in” to an existing ground
station, process realtime data feeds, and forward the data
to one or more client displays
QuickLook™ Server
Overview:
- The QuickLook server
consists of two components: the server executable and a
small “data tap” library that is linked with
ground station software having access to the raw data stream.
The server executable, although not mandatory, is normally
installed on the same machine as the data tap.
- The data tap API provides the mechanism for
passing both realtime image data as well as arbitrary time-tagged
ancillary information to the server.
- Standard data feed formats such as BIL (Band
Interleave by Line) and BSQ (Band Sequential) are supported.
- The server buffers, subsamples, and optionally
compresses the data stream before sending it to the QuickLook™
clients. In addition, the server can embed ancillary time-tagged
information that is then incorporated into the data stream
and transmitted to the QuickLook™ clients as well.
- In response to a command from a QuickLook™
client, the server can save a full-resolution snapshot of
the current image frame (generating the appropriate RSETS),
and function as a tile-based image server for access by
suitable ELT software at one or more client stations.
QuickLook™ Client Overview:
- The QuickLook™ client
is provided as an executable by default, yet is easily extensible.
Specifically, the source code for the display layer of the
client is provided along with the requisite object libraries,
enabling a customer to easily enhance and rebuild the QuickLook™
client.
- The default QuickLook™
client supports:
- Three types of scrolling displays: (1)
conventional waterfall; (2) swipe (whereby each new
screen of imagery overwrites the old as it comes in,
one line at a time, while the previous screen of data
remains fixed and does not scroll across the screen);
and, (3) discrete (whereby each new screen of imagery
overwrites the old after the entire new screen of imagery
has been acquired).
- Various orientations and behaviors for
common variations in sensor platforms (e.g., vertical
vs. horizontal updates). These can be changed on the
fly and are non-destructive.
- Simple DRA (Dynamic Range Adjustment)
and TTC (Tonal Transfer Curve) controls, also non-destructive.
- Multi-band or single band data.
- Ability to acquire and exploit full resolution
data (“snapshot”).
- VCR-like temporal slider control for
interactively reviewing data from any previous point
in the mission (while still acquiring realtime data).
For more information on QuickLook™,
contact us at
info (at) nextcentury (dot) com.
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