title: iphone - Sharpen UIImage
body: <p>I want to sharpen images in my app. </p>
  
  <p>I found this post</p>
  
  <p><a href="https://stackoverflow.com/questions/1486051/how-to-sharp-blur-an-uiimage-in-iphone">how to sharp/blur an uiimage in iphone?</a></p>
  
  <p>and also had a look at Apple's sample</p>
  
  <p><a href="http://developer.apple.com/iphone/library/samplecode/GLImageProcessing/index.html" rel="nofollow noreferrer">GLImageProcessing</a></p>
  
  <p>But that OpenGL ES thing killed my brain cells a lot and I still don't get it.</p>
  
  <p>So, Can anyone pls give me a piece of helper code to sharpen an UIImage?</p>
  
  <p>Thanks</p>