idiff

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

--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)