man jpegtoexr (Commandes) - convert a JPEG image to OpenEXR format
NAME
jpegtoexr - convert a JPEG image to OpenEXR format
SYNOPSIS
jpegtoexr input.jpg output.exr
DESCRIPTION
Converts a JPEG file to an EXR file in [0,1]. This program reads the JPEG file in Y'CbCr format and converts to RGB itself to hopefully gain some extra precision when storing in EXR format.
AUTHORS
Billy Biggs <vektor@dumbterm.net>.