NAME

       idiff -- compare two images

SYNOPSIS

       Usage:  idiff [options] image1 image2

DESCRIPTION

       This program is part of the OpenImageIO (http://www.openimageio.org) tool suite.  Detailed
       documentation is available in pdf format with the OpenImageIO distribution.

OPTIONS

       --help Print help message

       -v     Verbose status messages

       -q     Quiet (minimal messages)

       -a     Compare all subimages/miplevels

       Thresholding and comparison options

              -fail %g
                     Failure threshold difference (0.000001)

              -failpercent %g
                     Allow this percentage of failures (0)

              -hardfail %g
                     Fail if any one pixel exceeds this error (infinity)

              -warn %g
                     Warning threshold difference (0.00001)

              -warnpercent %g
                     Allow this percentage of warnings (0)

              -hardwarn %g
                     Warn if any one pixel exceeds this error (infinity)

              -p     Perform perceptual (rather than numeric) comparison

       Difference image options

              -o %s  Output difference image

              -od    Output image only if nonzero difference

              -abs   Output image of absolute value, not signed difference

              -scale %g
                     Scale the output image by this factor

                                          08 March 2020                                  idiff(1)