Posts Tagged ‘UAS DTU’

Finding the Hul(k)l with in

Posted: February 10, 2013 in Work
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Struggle is something that should never stop. Even if I want it to stop, time constrains are not allowing it to be stopped. Implementation up till now is good. But is taking more time then calculated (3-4 seconds). Hence the struggle for a better implementation continues. Today I have been working to find convex hull. around the object in the image. The idea seems to be not so good to me. But trying it is the only option. So am being a little optimistic for now. As the time passes, my assumptions are turning right. mapping the convex hull around target to the original size image was not really so good. SO after few trials i dropped this idea. Current implementation is good enough. So tweaking it could help us. Using the concept of ROI really helped.   Now I am trying what I call another way of finding saliency map. This should reduce my run time (SHOULD).

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Segmentation

Posted: January 17, 2013 in Work
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Almost all recognition jobs start with segmentation. Hence, I am giving segmentation the top priority. Due to time constrains, I am forced to conduct segmentation on reduced size image. When I map segmented mask to the original image. I get this:

aThis is looks cool enough. But is not really. I aim for more accuracy. So the struggle begins.

I am  half sleeping while am writing this post. Today’s night was not full of debugging (finally!). But today’s trial to map segmented target from pyrDowned image to actual image seems useless. Reason being 61 seconds ! One of the step , which is very important to jump to recognition step (step which I can not name right now) has started taking 61 seconds every time. Such a huge time is obviously a issue of big concern. Though I am feeling too sleepy today, but trying this thing out was important.

So here we go with explanation. Larger image surely contains more info then the smaller one. But it also takes larger time to process it. So it processing the pyrDowned image was fair enough ! But bringing the size down result in loss in info.   So i was able to perform segmentation on smaller image. But to carry identification operation it was important for me to map segmented object to the one in actual image. So this is the point where problem rises. If I map contour of target from smaller image, I get false result most of the time (undesirable ). This happens due the loss of information while reducing the size of image. And hence the target obtained in small image is not of exact shape. Thus mapping the contour of this target results in false result (or no result ).

Aarush-X1

Posted: December 10, 2012 in General
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Aarush X1 is the result of an industry-academia collaboration between Lockheed Martin and
Delhi Technological University. The Unmanned Aerial System has been designed and fabricated
by a group of undergraduate students of the university, who received timely guidance from
mentors in the faculty and Lockheed Martin. The UAS has been designed according to the
constraints imposed by urban environments, making the system invaluable for ISR in cities like
Delhi and Mumbai. The system, in fact, can be modified to adapt to specific mission-dependent
requirements.
Aarush X1

The UAS was unveiled by Dr. V.K.Saraswat, Director General, D.R.D.O, on November 2nd,
2012, at the Lokarpan Ceremony held at the India Habitat Centre. The ceremony was presided
over by Dr. D.N. Reddy (title), and Dr.R.P.Aggarwal. The event witnessed a small presentation
by the student project manger and team captain, outlining the design and fabrication process
adopted by the team. Mr. John Sheehan, who along with Dr. Peter Drewes, mentored the students,
highlighted the key accomplishments of the project, and congratulated the students on their
acheivement.Mr. Abhay Paranjape, (title) also attended the ceremomy, and emphasised on the
importance of the sustenance of student effort, and long term relationships between industry and
academia , in his talk.

Dr. V.K.Saraswat lauded the student effort and expressed a desire to nurture the student talent. He
also outlined some major capabilities that are demanded of current Unmanned Air Systems, like
stealth and payload compatibility.The Lokarpan Ceremony was also attended by representatives
from HAL, NTRO, Army, IAF and DST.

The ceremony concluded with an invitation to all the attendees to witness the First Public Flight
of Aarush-X1, which was to be held the following day (November 3rd) at Karnal Institute of
Civil Aviation, Haryana.

The Flight Day was attended by engineers from HAL and NTRO amongst others.
The UAS did a single sortie for about 3 minutes. Telemetry and real time video, were displayed
at the portable ground station. The UAS was taxied to the viewing area, after the landing, for a
visual inspection by the attendees, which was followed by a question and answer session.

Courtesy: Bhavya N. Gupta