idiff(1)
| idiff(1) | OpenImageIO | idiff(1) |
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)
| 19 May 2026 |