Reformatting binary image data to generate smaller compressed image data size

Abstract

In various exemplary embodiments, systems include a segmentor to segment text binary image data to a first plane. A subtractor subtracts text binary image from binary image data to generate a non-text binary image data in a second plane. A converter converts non-text binary image data in the second plane into non-text gray scale image data in the second plane. A first compressor compresses the text gray scale image data in the first plane. A second compressor compresses the non-text gray scale mage in the second plane.

1 . A method for reformatting binary image data, comprising: 
 converting binary image data into gray scale image data;    segmenting gray scale image data into a first plane having high spatial frequency gray scale image data and a second plane having low spatial frequency gray scale image data; and    separately compressing the high spatial frequency gray scale image data in the first plane and the low spatial frequency gray scale image data in the second plane.    
   
   
       2 . The method of  claim 1 , wherein segmenting gray scale image data includes segmenting the high spatial frequency gray scale image data into a plurality of planes based on gray scale levels of the high spatial frequency gray scale image data.  
   
   
       3 . The method of  claim 1 , further comprising: 
 enhancing the low spatial frequency gray scale image data in the second plane.    
   
   
       4 . A computer readable medium or a modulated signal being encoded to perform the method of  claim 1 .  
   
   
       5 . A method for reformatting binary image data, comprising: 
 segmenting binary image data to generate text binary image data in a first plane;    subtracting the text binary image data from binary image data to generate non-text binary image data in a second plane;    converting the non-text binary image data in the second plane into non-text gray scale image data in the second plane; and    separately compressing the text binary image data in the first plane and the non-text gray scale image data in the second plane.    
   
   
       6 . The method of  claim 5 , further comprising: 
 removing speckle noise from the text binary image data in the first plane.    
   
   
       7 . The method of  claim 5 , further comprising: 
 enhancing the non-text gray scale image data in the second plane.    
   
   
       8 . A computer readable medium or a modulated signal being encoded to perform the method of  claim 5 .  
   
   
       9 . An apparatus to reformat binary image data, comprising: 
 a converter to convert binary image data into gray scale image data;    a segmentor to segment gray scale image data into high spatial frequency gray scale image data in a first plane and low spatial frequency gray scale image data in a second plane;    a first compressor to compress the high spatial frequency gray scale image data in the first plane; and    a second compressor to compress the low spatial frequency gray scale image data in the second plane.    
   
   
       10 . The apparatus of  claim 9 , wherein the segmentor segments the high spatial frequency gray scale image data into a plurality of planes based on gray scale levels of the high spatial frequency gray scale image data.  
   
   
       11 . The apparatus of  claim 9 , further comprising: 
 a filter to enhance the low spatial frequency gray scale image data in the second plane.    
   
   
       12 . A marking device incorporating the apparatus of  claim 9 .  
   
   
       13 . A digital photocopier incorporating the apparatus of  claim 9 .  
   
   
       14 . A stand alone document scanner or a multifunctional device incorporating the apparatus of  claim 9 .  
   
   
       15 . An apparatus to reformat binary image data, comprising: 
 a segmentor to segment text binary image data to a first plane;    a subtractor to subtract text binary image from binary image data to generate a non-text binary image data in a second plane;    a converter to convert non-text binary image data in the second plane into non-text gray scale image data in the second plane;    a first compressor to compress the text gray scale image data in the first plane; and    a second compressor to compress the non-text gray scale mage in the second plane.    
   
   
       16 . The apparatus of  claim 15 , further comprising: 
 a first filter to remove speckle noise from the text binary image data in the first plane.    
   
   
       17 . The apparatus of  claim 15 , further comprising: 
 a second filter to enhance the non-text gray scale image data in the second plane.    
   
   
       18 . A marking device incorporating the apparatus of  claim 15 .  
   
   
       19 . A digital photocopier incorporating the apparatus of  claim 15 .  
   
   
       20 . A stand alone document scanner or a multifunctional device incorporating the apparatus of  claim 15.