title: HDR images through Core Image?
body: <p>Is it possible to process(filter) HDR images through Core Image? I couldn't find much documentation on this, so I was wondering if someone possibly had an answer to it. I do know that it is possible to do the working space computations with <code>RGBAh</code> when you initialize a <code>CIContext</code>, so I figured that if we could do computations with floating point image formats, that it should be possible..</p>
  
  <p>What, if it is not possible, are alternatives if you want to produce HDR effects on iOS?</p>
  
  <p>EDIT: I thought I'd try to be a bit more concise. It is to my understanding that HDR images can be clamped and saved as .jpg, .png, and other image formats by clamping the pixel values. However, I'm more interested in doing tone mapping through Core Image on a HDR image that has not been converted yet. The issue is encoding a CIImage with a HDR image, supposedly with the .hdr extention.</p>
  
  <p>EDIT2: Maybe it would be useful to useful to use <code>CGImageCreate</code> , along with <code>CGDataProviderCreateWithFilename</code> ?</p>