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 VAL
                     Failure threshold difference (default: 1e-06)

              -failpercent PERCENT
                     Allow this percentage of failures (default: 0)

              -hardfail VAL
                     Fail if any one pixel exceeds this error (default: inf)

              -warn VAL
                     Warning threshold difference (default: 1e-06)

              -warnpercent PERCENT
                     Allow this percentage of warnings (default: 0)

              -hardwarn VAL
                     Warn if any one pixel exceeds this error (default: inf)

              -p     Perform perceptual (rather than numeric) comparison

       Difference image options

              -o FILENAME
                     Output difference image

              -od    Output image only if nonzero difference

              -abs   Output image of absolute value, not signed difference

              -scale FACTOR
                     Scale the output image by this factor (default: 1)

                                         02 February 2022                                idiff(1)