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Please note that we ALWAYS
encourage the public to attend ANY of our events, including meetings.
Come and enjoy the lecture and talk to us about astronomy!
NOTE!!
Tonight is the last meeting prior to our three month summer break.
If you need to renew your dues, please come prepared to do so and make
our Treasurer happy. ;^)
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8:00 PM
- Call to order and introduction of tonight's program: |
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Speaker: |
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John Harkey |
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Presentation: |
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Signal Processing for Image Processing in
Astronomy
Images are collections of photon traces
that can yield information about the stars and the universe. Those same
images can be thought of as collections of signals along arbitrary axes
that take the one-dimensional photon dot to a two-dimensional sequence.
This allows the data to be processed by any number of the vast world of
signal processing algorithms. The data can be integrated and averaged to
enhance the brightness and contrast. If data is used from many images,
this process can add detail that cannot normally be seen by the naked
eye. In some cases, these images take a sufficiently long period of time
to collect that it cannot be done in one session, in one night. This
creates a new problem that different collections need to be aligned with
each other because it is impossible to align equipment to the exact same
orientation and still be affordable to the amateur astronomer. |
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Click the small images below to
see the original sized documents
 
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About our speaker: |
John Harkey is a recently retired
Electrical/Software Engineer and has been an amateur astronomer
for 35 years. He recently purchased an inexpensive digital
camera, a GE 1440 costing only $60, and interfaced it to his 8"
Schmidt-Cassegrain telescope using a 3D printed fixture. He saw
the need to integrate images taken over a single night or more,
in order to collect enough light from some objects. John used
his expertise to write some image processing software to
correlate, align, and integrate images of any size. This
software also translates, rotates, magnifies, offsets, and
amplifies images. It has an interface so that users can create
their own image processing algorithms and is supported by an
additional signal processing program that shares the same data
format of the image processing software so that data may be
copied from one program to the other with just two mouse
clicks. The programs actually do lots more. John is willing to
share these things with ACA members for just simply using them and
offering some feedback to him. That's his motivation for
speaking to us tonight. |
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9:00 PM - Brief coffee-break
/ discussion time |
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9:15 PM - Business meeting
to be called to order and will include the following: |
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● Treasurer's Report |
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● Observatory Director's Report |
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● Calls for observations |
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● New Business |
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