1idiff(1)                          OpenImageIO                         idiff(1)
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NAME

6       idiff -- compare two images
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SYNOPSIS

9       Usage: idiff [options] image1 image2
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DESCRIPTION

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

18       --help Print help message
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20       --version
21              Print version and exit
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23       -v     Verbose status messages
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25       -q     Quiet (minimal messages)
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27       -a     Compare all subimages/miplevels
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29       Thresholding and comparison options
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31              -fail VAL
32                     Failure absolute difference threshold (default: 1e-06)
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34              -failrelative VAL
35                     Failure relative threshold (default: 0)
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37              -failpercent PERCENT
38                     Allow this percentage of failures (default: 0)
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40              -hardfail VAL
41                     Fail if any one pixel exceeds this error (default: inf)
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43              -allowfailures N
44                     OK  for  this number of pixels to fail by any amount (de‐
45                     fault: 0)
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47              -warn VAL
48                     Warning absolute difference threshold (default: 1e-06)
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50              -warnrelative VAL
51                     Warning relative threshold (default: 0)
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53              -warnpercent PERCENT
54                     Allow this percentage of warnings (default: 0)
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56              -hardwarn VAL
57                     Warn if any one pixel exceeds this error (default: inf)
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59              -p     Perform perceptual (rather than numeric) comparison
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61       Difference image options
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63              -o FILENAME
64                     Output difference image
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66              -od    Output image only if nonzero difference
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68              -abs   Output image of absolute value, not signed difference
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70              -scale FACTOR
71                     Scale the output image by this factor (default: 1)
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75                                12 January 2023                       idiff(1)
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