The orientation attribute and -orient command
hack bear <[email protected]> Mon, 20 May 2013 09:58:03 -0700
| Newsgroups | gmane.comp.video.graphicsmagick.tools |
|---|---|
| Message-ID | <[email protected]> |
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Hi=2C
I just want to use GM to rotate the image's orientation and update the EXIF=
Orientation attribute. I can get the image rotated using -rotate. It seems=
that there is no way to set or remove the orientation attribute. Hopefully=
I can do it without involving another external process (I'm driving GM fro=
m the gm4java tool in batch mode.) What's the advice for doing that? When w=
ill GM start attaining some EXIF capability like ImageMagic?
Also I'm not sure exactly what the -orient command does. I tried it and it =
didn't seem to have an effect:
MAC: $ exiftool src/test/resources/photo_90.jpg | egrep 'Orient|Width|Heigh=
t'
Orientation : Rotate 90 CW
Exif Image Width : 1600
Exif Image Height : 1200
Image Width : 1600
Image Height : 1200
MAC175: $ gm convert -orient TopLeft src/test/resources/photo_90.jpg /tmp/g=
moriented.jpg
MAC175: $ exiftool /tmp/gmoriented.jpg | egrep 'Orient|Width|Height'
Orientation : Rotate 90 CW
Exif Image Width : 1600
Exif Image Height : 1200
Image Width : 1600 # no change
Image Height : 1200
# -rotate works as expected
MAC: $ gm convert -rotate 90 src/test/resources/photo_90.jpg /tmp/gmrotated=
.jpg
MAC: $ exiftool /tmp/gmrotated.jpg | egrep 'Orient|Width|Height'
Orientation : Rotate 90 CW
Exif Image Width : 1600
Exif Image Height : 1200
Image Width : 1200 # rotated!
Image Height : 1600
Since I only interested in orienting (i.e. rotate by multiple of 90 degrees=
) I would guess -orient may be faster than -rotate.
Thanks!
=
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<body class=3D'hmmessage'><div dir=3D'ltr'>Hi=2C<br><br>I just want to use =
GM to rotate the image's orientation and update the EXIF Orientation attrib=
ute. I can get the image rotated using -rotate. It seems that there is no w=
ay to set or remove the orientation attribute. Hopefully I can do it withou=
t involving another external process (I'm driving GM from the gm4java tool =
in batch mode.) What's the advice for doing that? When will GM start attain=
ing some EXIF capability like ImageMagic?<br><br>Also I'm not sure exactly =
what the -orient command does. I tried it and it didn't seem to have an eff=
ect:<br><br><font style=3D"" face=3D"Courier New">MAC: $ exiftool src/test/=
resources/photo_90.jpg | egrep 'Orient|Width|Height'</font><font style=3D""=
face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier New">Orie=
ntation =3B =3B =3B =3B =3B =3B =3B =3B&nbs=
p=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B : Rotate 90 CW</font><font style=3D"" face=3D"Courier N=
ew"><br></font><font style=3D"" face=3D"Courier New">Exif Image Width =
=3B =3B =3B =3B =3B =3B =3B =3B =3B =3B=
 =3B =3B =3B =3B =3B : 1600</font><font style=3D"" face=
=3D"Courier New"><br></font><font style=3D"" face=3D"Courier New">Exif Imag=
e Height =3B =3B =3B =3B =3B =3B =3B =3B&nb=
sp=3B =3B =3B =3B =3B =3B : 1200</font><font style=3D""=
face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier New">Imag=
e Width =3B =3B =3B =3B =3B =3B =3B =3B&nbs=
p=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B : 1600</font><font style=3D"" face=3D"Courier New"><br>=
</font><font style=3D"" face=3D"Courier New">Image Height =3B =3B&n=
bsp=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B =3B =3B =3B =3B =3B : 1200</font><f=
ont style=3D"" face=3D"Courier New"><br></font><font style=3D"" face=3D"Cou=
rier New">MAC175: $ gm convert -orient TopLeft src/test/resources/photo_90.=
jpg /tmp/gmoriented.jpg</font><font style=3D"" face=3D"Courier New"><br></f=
ont><font style=3D"" face=3D"Courier New">MAC175: $ exiftool /tmp/gmoriente=
d.jpg | egrep 'Orient|Width|Height'</font><font style=3D"" face=3D"Courier =
New"><br></font><font style=3D"" face=3D"Courier New">Orientation =3B&n=
bsp=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B =3B =3B =3B =3B =3B =3B =3B=
: Rotate 90 CW</font><font style=3D"" face=3D"Courier New"><br></font><fon=
t style=3D"" face=3D"Courier New">Exif Image Width =3B =3B =3B&=
nbsp=3B =3B =3B =3B =3B =3B =3B =3B =3B&nbs=
p=3B =3B =3B : 1600</font><font style=3D"" face=3D"Courier New"><br=
></font><font style=3D"" face=3D"Courier New">Exif Image Height =3B&nbs=
p=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B =3B : 1200</font><font style=3D"" face=3D"Courier N=
ew"><br></font><font style=3D"" face=3D"Courier New">Image Width =3B&nb=
sp=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B =3B =3B =3B =3B =3B =3B =3B=
: 1600</font><font style=3D"" face=3D"Courier New"> # no change<br></font>=
<font style=3D"" face=3D"Courier New">Image Height =3B =3B =3B&=
nbsp=3B =3B =3B =3B =3B =3B =3B =3B =3B&nbs=
p=3B =3B =3B =3B =3B =3B =3B : 1200</font><font sty=
le=3D"" face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier Ne=
w"># -rotate works as expected</font><font style=3D"" face=3D"Courier New">=
<br></font><font style=3D"" face=3D"Courier New">MAC: $ gm convert -rotate =
90 src/test/resources/photo_90.jpg /tmp/gmrotated.jpg</font><font style=3D"=
" face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier New">MAC=
: $ exiftool /tmp/gmrotated.jpg | egrep 'Orient|Width|Height'</font><font s=
tyle=3D"" face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier =
New">Orientation =3B =3B =3B =3B =3B =3B =3B&nb=
sp=3B =3B =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B =3B : Rotate 90 CW</font><font style=3D"" face=3D"C=
ourier New"><br></font><font style=3D"" face=3D"Courier New">Exif Image Wid=
th =3B =3B =3B =3B =3B =3B =3B =3B =3B&=
nbsp=3B =3B =3B =3B =3B =3B : 1600</font><font style=3D=
"" face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier New">Ex=
if Image Height =3B =3B =3B =3B =3B =3B =3B&nbs=
p=3B =3B =3B =3B =3B =3B =3B : 1200</font><font sty=
le=3D"" face=3D"Courier New"><br></font><font style=3D"" face=3D"Courier Ne=
w">Image Width =3B =3B =3B =3B =3B =3B =3B =
=3B =3B =3B =3B =3B =3B =3B =3B =3B =3B=
 =3B =3B =3B : 1200</font><font style=3D"" face=3D"Courier New"=
> # rotated!</font><font style=3D"" face=3D"Courier New"><br></font><font s=
tyle=3D"" face=3D"Courier New">Image Height =3B =3B =3B =3B=
 =3B =3B =3B =3B =3B =3B =3B =3B =3B&nb=
sp=3B =3B =3B =3B =3B =3B : 1600</font><font style=3D""=
face=3D"Courier New"><br></font><br>Since I only interested in orienting (=
i.e. rotate by multiple of 90 degrees) I would guess -orient may be faster =
than -rotate.<br><br>Thanks!<br><br><br> </div></body>
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