On 4/23/19 12:30 PM, Rich Shepard wrote:
On Tue, 23 Apr 2019, Ali Corbin wrote:
It'll take human intervention, to look at each individual image and
decide
whether to rotate it.
Ali,
This I knew. I usually use the GIMP for this manipulation and am glad to
learn that ...
Happily, it's not too onerous to do this in imagemagick, using the
'display' command.
This will bring up the first jpg in the directory as the start of a
slideshow.
display *.jpg &
Then you can hit the space bar to cycle through the images. '/' or '\'
will rotate the image that you're looking at, and Ctrl-S will save it.
And once they're all properly oriented I can use convert's -resize
option to
change all in the same subdirectory.
Much appreciated,
Rich
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BTW, the identify tool does this. It's part of IM as are a number of
other image processing commands.
Get the size of the image using
$ identify -format "%wx%h\n" /path/to/image
in the -format string
%w is the pixel width
%h is the height
\n is to print a newline, otherwise it clobbers your prompt.
Without -format it prints out a lot of stuff, see
https://www.imagemagick.org/script/escape.php for more options in
trimming the output of identify.
Once you have an identify command that is scriptable, a BASH becomes trivial
------
$aspectratio = identify $image
IF [ $aspectratio is wrong ]; THEN
convert $image $newaspectratio
convert $image $newscale
ELSE
convert $image $newscale
FI
------
Just pounding out pseudocode so that we are aware that YES, imagemagick
can do this for you.
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