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Class feature.EdgeMap 

java.lang.Object
   |
   +----feature.EdgeMap
public class EdgeMap
extends Object
Realization of canny edge detection algorithm

Author:
Di Zhong (Columbia University)

Variable Index

o map
Two dimension byte array of edgemap data, map[i][j]= 0 - no-edge pixel ; >0 - edge pixel.

Constructor Index

o EdgeMap(float[][], float)
Construct an edge map from a gray level image using Canny operator

Method Index

o savePGM(String)
Save EdgeMap into a PGM file

Variables

o map 
 public byte map[][]
Two dimension byte array of edgemap data, map[i][j]= 0 - no-edge pixel ; >0 - edge pixel.

Constructors

o EdgeMap 
 public EdgeMap(float img[][],
                float sigma)
Construct an edge map from a gray level image using Canny operator

Parameters:
img - original gray-level image (Note: it will be smoothed)
sigma - smooth coefficient

Methods

o savePGM 
 public void savePGM(String fname)
Save EdgeMap into a PGM file

Parameters:
fname - The file name 
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