"The suite comprises three tools. CVLView is image viewer for
PFS files, CVLTonemap is an image viewer designed to quickly handle
high dynamic range (HDR) images, and cvtool is a command-line tool
that lets you apply transformations, color manipulations, blending,
and filtering to images. They take advantage of the processing
power of your GPU to allow you to apply tone-mapping changes to an
image in real time. You need to have an Nvidia GeForce 6.x or later
graphics card to use the tools."