title: Best image format for/in CUDA image processing
body: <p>i am new to image-processing in CUDA.
  I am currently learning whatever i can about this.
  Can anyone tell me what is the appropriate format (extension of image) for storing and accessing image files so that CUDA processing would have the most efficiency.</p>
  
  <p>And y does all the sample cuda programs for image processing use .ppm file format for images.</p>
  
  <p>And can i convert the images in other format to that format.</p>
  
  <p>And how can i access those files (CUDA Code)?</p>