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.TH PDELTA 1 10/04/11 RADIANCE
.SH NAME
pdelta \- compute 1976 CIE Lab deltaE* between two Radiance pictures
.SH SYNOPSIS
.B pdelta image1.hdr image2.hdr
.SH DESCRIPTION
.I pdelta
calculates the color difference deltaE* between two HDR images. The operation
takes place in 1976 CIE Lab color space. The result is an HDR image which is 
sent to STDOUT.
.SH EXAMPLES
To calculate the deltaE* Lab color difference between two HDR images
and store the result in output.hdr
.IP "" .2i
pdelta image1.hdr image2.hdr > output.hdr