Extracting preview images from RAW files?

[whatdoido]

Hi

Nikon NEF and Canon CR2 RAW files contain a number embedded preview jpeg images - one full sized image along with smaller images.

Using:

Code: Select all

convert NEF foo.jpg

the output is the small preview image. How does one extract the larger/full sized preview image? I do NOT want IM to perform a conversion of the RAW file to jpeg but simply to extract the preview image.