title: What is the header size of png, jpg/jpeg, bmp, gif and other common graphics format?
body: <p>I have search in google.
  I found something here, <a href="http://paulbourke.net/dataformats/bmp/">http://paulbourke.net/dataformats/bmp/</a> , but i can't understand the size of header.</p>
  
  <p>Reading some webpages i got confused. <a href="http://en.wikipedia.org/wiki/JPEG">http://en.wikipedia.org/wiki/JPEG</a></p>
  
  <p>Can anyone give the correct information of header about all these format?</p>