NAME

       idiff -- compare two images

SYNOPSIS

       Usage: idiff [options] <image1> <image2 | directory>

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

       --version
              Print version and exit

       -v     Verbose status messages

       -q     Quiet (minimal messages)

       -a     Compare all subimages/miplevels

       Thresholding and comparison options

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

              -failrelative VAL
                     Failure relative threshold (default: 0)

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

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

              -allowfailures N
                     OK for this number of pixels to fail by any amount (default: 0)

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

              -warnrelative VAL
                     Warning relative threshold (default: 0)

              -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)

                                                 07 August 2025                                         idiff(1)