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Notice removed Reward existing answer by int_ua
Bounty Ended with Mathias Bynens's answer chosen by int_ua
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Bounty Started worth 50 reputation by int_ua
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Nicolas Raoul ♦
Nicolas Raoul ♦
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I need a command line tool that compares 2 images and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

  • Exact graphical sameness is needed
  • Compression loss, even if nearly invisible, makes a different image
  • Same alpha-transparency is also important
  • EXIF/etc irrelevant

I need a command line tool that compares 2 images and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

I need a command line tool that compares 2 images and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

  • Exact graphical sameness is needed
  • Compression loss, even if nearly invisible, makes a different image
  • Same alpha-transparency is also important
  • EXIF/etc irrelevant
added 1 character in body; edited title
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sashoalm
sashoalm
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Command line tool to check whether two images are exactexactly the same graphically

I need a command line tool that compares 2 imageimages and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

Command line tool to check whether two images are exact same graphically

I need a command line tool that compares 2 image and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

Command line tool to check whether two images are exactly the same graphically

I need a command line tool that compares 2 images and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

added precision, seen in comment from asker
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Nicolas Raoul ♦
Nicolas Raoul ♦
  • 19.7k
  • 12
  • 59
  • 151

Command line tool to compare if 2check whether two images have theare exact same contentsgraphically

I need a command line tool that compares 2 image and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

Command line tool to compare if 2 images have the same contents

I need a command line tool that compares 2 image and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Command line tool to check whether two images are exact same graphically

I need a command line tool that compares 2 image and says if their contents are the same, regardless of encoding - i.e. one might be a *.bmp and the other might be a *.png, so long as all their width, height and all the corresponding pixels are the same.

Exact graphical sameness is needed.
Compression loss, even if nearly invisible, makes a different image.
EXIF/etc irrelevant.

Tweeted twitter.com/#!/StackSoftRecs/status/488334816367370241
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sashoalm
sashoalm
  • 1.1k
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  • 27