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164 INTELLIGENT COMMUNICATION SYSTEMS
FIGURE 12.9 Example of W ml (n. k).
12.4 IMAGE RECOGNITION FORTELESENSATION
12.4.1 Image Analysis
12.4.1.1 Line Analysis
The important information that is included in a line segment helps to analyze a
figure or an image. To recognize a rectangular solid object, line segments of the
object need to be determined. Using the structural information about line segments,
the shape of the object is recognized. For a binary image, the value of any pixel
brighter than the specific gray level is set at 0, and the value of a pixel darker than
the specific value is set at 1.
12.4.1.2 Assignment of Multiple Threshold Values
For a binary image, the method employs not a single threshold value, but multiple
threshold values. A binary image generated by multiple threshold values is con-
sidered a level plane. Using level planes, all of the contour lines are clear.
