reference/ocr-new/prop.doc
author viric@llimona
Thu, 18 May 2006 23:12:51 +0200
changeset 0 6b8091ca909a
permissions -rw-r--r--
Init from working directory of svn repository.


Here are my property and distance settings currently.  Property
27 and 28 are weighted at 3. I am not sure why The disjoint property
had to be so heavily weighted.  


void Component::setProperties(BitMap * map)  // was BitMap
/*--------------------------------------------------------------
Primary Purpose: Set the property vector for this component
Arguments:  The BitMap to which this component belongs
Return Value:
Effects: Property 0-24
    The component is divided into a 5 by 5 grid.  A gray
    scale (0 - 255) for each section is determined.  The gray scale
    is 0 for all white, 255 for all black, but normally will be somewhere
    between the two.  The gray scales are represented in properties
    0-24. 
    Property 25 is the grayscale accross the top.
    Property 26 is the grayscale accross the bottom.
    Property 27 is the width/height ratio again scaled to (0-255)
    Actually the formula for property 27 is
        width/ height * 255  if height > width
        1- height/width * 255 if width > height
    This way near 0 is very tall and thin
             near 128 height near width
	     near 255 very wide
    Property 28 is  Indicator of a vertically disjoint character
     like i and j. 0 - not disjoint. 255 - disjoint





Distance Component::distance(Component * comp) 
/*--------------------------------------------------------------
Primary Purpose: Determines heuristic distance between two components
Arguments:  Another component to compare
Return Value: integer value which represents the distance between two 
   components. Distance = sum over i of
                       weight *square (this->fproperty[i] - comp->fproperty[i])
		       weight for i == 27, 28 is 3 weight is 1 for all other 
		       properties