Adding blur to image reflection

Using the following to reflect an image. Would like to know if it is possible to add a blur to only the reflection. Most things I have tried result in the entire image being blurred.

img {
-webkit-box-reflect: below 0px -webkit-gradient(linear, left top, left bottom, from(transparent), color-stop(20%, transparent), to(rgba(255, 255, 255, 0.5)));
}