Master

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s Thesis 2006 

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STUTTGART

TECHNIK

Background 

        STUTTGART UNIVERSITY OF APPLIED 

SCIENCES 

(DTD)  for  the  SVGT  language.  The  SVGT  rendering  engine  needs  to  process  an 

SVGT  document  with  an  appropriate,  predictable  structure,  and  the  DTD  helps  that 

this process goes smoothly. 

The 

svg

  element  contains  all  other  elements.  It  is  the  document  element  of  the 

document. Inside this element, the developers can add their own codes which describe 

their  graphic  by  applying  the  standard  shape  elements  and  attribute  which  are 

provided by SVGT. 

2.4.3  Basic Capabilities of SVGT 

The use of the word "scalable" in SVG has two meanings. First, vector graphic images 

can  easily  be  made  scalable;  for  example,  they  are  not  limited  to  a  single  and  fixed 

pixel  size.  This  means  SVG  format  can  be  displayed  on  any  device  of  any  size  and 

any  resolution  without  changing  the  image  clarity.  This  contrasts  with  raster  image 

files,  which  are  difficult  to  modify  without  loss  of  information.  When  the  raster 

images  are  zoomed  in  to  large  scales,  the  content  of  the  image  becomes  blurred. 

SVGT graphics don

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t have the blur problem because of their vector property. Figure 4 

shows  a  comparison  of  the  quality  of  a  SVGT  graphic  and  a  JPEG  graphic.  The 

difference  can  be  seen  easily.  When  the  graphics  are  zoomed  into  a  big  scale,  the 

raster image becomes blurred and the borderline becomes unclear. 

Fig. 4: 

Two images were created to compare the quality of SVG image (left) and raster image 

(right) in high scale. SVG graphic kept higher quality; raster image became blurry. 

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