Related sites
A preliminary
report describes some effort in wavelet denoising of these images.
The following
images represent the difficulty of the problem. The title includes
the coordinates of the mine location
(x is the first coordinate).
Side Scan Sonar Mine Detection
The current data base consists of a 60-image set from a side-scan
sonar (SSS0) collected at the Naval Surface Warfare Center (NSWC).
They are encoded as 8-bit gray scale images, 1024 range cells by 511
cross-range cells. The 60 images contain 33 targets; some contain more
than one target while others contain no targets. Non-target objects
which look as targets appear throughout the images. A typical
mine-like target consists of a strong highlight on its left side and a
long shadow down range on its right side. Unfortunately the presence
of clutter can mask this structure.
To optain the side-scan sonar or the backscatter data please
contact Dr. Quyn Huynh 850-234-4158, or
Dr. Edward Linsenmeyer 850-234-4161.
si000206 (Easy - 427,143; 860,351)
|
si007225 (Difficult - 360,227)
|
|---|
si005134 (Difficult - 771,136)
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si001104 (Very Difficult - 307,254)
|
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Back Scatter Sonar
This application involves an active backscatter data set of mine-like objects. The data was collected at the Naval Surface Warfare Center (NSWC) by Gerald Dobeck. The task is to distinguish between man-made and non-man-made objects. There are six objects in the data: metal cylinder, cone-shaped plastic object, water-filled barrel, limestone rock, granite rock, and a water-logged wooden log. The data-set contained seven different frequency bands, however in this preliminary study, only one frequency band, an FM sweep between 20 to 60 kHz was used. The targets were suspended in a large water tank, while cylindrical objects were suspended horizontally. Measurements were collected in 5 degree increments on a rotating target around a vertical axis. Every second measurement was used for testing, thus the train and test data were interleaved and both included measurements at 10 degree increments.
A preliminary
report appeard in SPIE-97. It describes some effort in wavelet
denoising of these images.