Table 2: 
  
TABLE 1: List of computer-based tool groups to be used in ROICATS. 
  
  
  
OPE, 
COMPUTER-BASED 
TOOL GROUP DESCRIPTION OF TOOL(S) 
LT i — 
Extract a sub-image from a generated SAR image. The sub-image N 
Ship Image represents the radar returns of a ship. Extraction can be done either C 
Extraction Tools automatically by ROICATS, or manually by the Operator. 
Enhance the appearance of a SAR image by using one of many image 
Image processing tools. Possible image enhancement tools include: Threshold, 
Processing Tools Laplacian, Maximum Gradient, Histogram equalization and High 
Frequency Contrast (see Rey et al. 1987 for a description of these 
techniques). These techniques are usually applied to the SAR image of a N 
ship to allow easier visualization of the image’s large dynamic range. The In 
Laplacian technique seems to provide the best image enhancement. 
  
Display a SAR image using a variety of display styles. The display styles 
Display Tools include: 3D plots (colour or monotone), Contour Plots (colour or Mu 
monotone), Range Profiles, and Surface Intensity Plots. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Database Allow information on SPOT or RDP stored images, or ship structures, to 
Manager Tools be added, read, deleted and/or modified. 
Image Manipulation Manipulate the displayed SAR image or superstructure of a ship by C 
Tools Rotating, Scaling or Translating it. 
Extract or derive certain pieces of information from a displayed SAR 
image or ship structure. These tools include an Electronic Ruler to m 
Image Feature measure the distance between two points on an Operator selected image, IC 
Extraction Tools and a Length Estimator to compute the minimum length of a ship in its 
SAR image based upon Operator inputs. 
Overlay Tool Allow a ship wireframe model to be overlayed on a displayed SAR ship E 
image, thus allowing a direct comparison. 
Simulate the SAR image of a ship under the assumption that it is either 
Ship Image stationary or moving. For the classification process, only one set of 
Simulator Tool rotational motions are used to generate a simulated image of a moving 
ship. This image should resemble a vertical profile. If more than one set 
of motions is allowed, this would increase the number of simulated STATIC 
images, which in turn would drastically increase the time required for MENU 
matching the real and simulated images during classification. 
DYNAMIC 
MENU 
SOFTKEY: 
MENU 
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