How to differentiate between sharpen and un-sharpen area?
<p>How to find the sharpen area in an image ?</p>

<p>I have an image taken with cylindrical din; where it is taken from top - its a 8 bit gray image. so in center of the image it looks like sharpen; on the din the surface seems to sharpen than the background of the image..</p>

<p>now need to differentiate between din and background ??</p>

<p>How to differentiate between sharpen and un-sharpen area ??? </p>
