title: what is the difference between bisizeimage , bisize and bfsize?
body: <p>i'm new to this field ,and i get confused between some terms!</p>
  <p><strong>bisizeimage</strong>, <strong>bisize</strong> and <strong>bfsize</strong>!</p>
  <p>please i need a simple definitions for each one, and if there is equations to calculate them ?</p>
  <p><a href="/questions/tagged/bisizeimage" class="post-tag" title="show questions tagged &#39;bisizeimage&#39;" rel="tag">bisizeimage</a> <a href="/questions/tagged/bisize" class="post-tag" title="show questions tagged &#39;bisize&#39;" rel="tag">bisize</a> <a href="/questions/tagged/bfsize" class="post-tag" title="show questions tagged &#39;bfsize&#39;" rel="tag">bfsize</a> <a href="/questions/tagged/bitmapinfoheader" class="post-tag" title="show questions tagged &#39;bitmapinfoheader&#39;" rel="tag">bitmapinfoheader</a> <a href="/questions/tagged/bitmapfileheader" class="post-tag" title="show questions tagged &#39;bitmapfileheader&#39;" rel="tag">bitmapfileheader</a></p>
  <p>edited : (&quot;answered by friend&quot;)</p>
  <blockquote>
  <p>biSize &gt; The number of bytes required by the structure.
  (what is the structure exactly  ?)</p>
  <blockquote>
  <p>The structure is the struct BITMAPINFOHEADER. That is a fixed value.</p>
  </blockquote>
  <p>biSizeImage &gt; The size, in bytes, of the image.
  bfSize &gt; The size, in bytes, of the bitmap file.
  (what is the difference between image &amp; bitmap file  ?)</p>
  <blockquote>
  <p>biSizeImage is the whole image size, bfSize is the same, but you have to add the size of the 2 header files.</p>
  </blockquote>
  </blockquote>