Revisions to Use mogrify to resize large images while ignoring small ones

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edited Dec 17, 2022 at 20:46

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You could also use theimagemagick fx operator to filterallows filtering images based on height/width e.g.

(( $(identify -format '%[fx:(h>400 && w>400)]\n']' image.png) ))

the inner command will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use so the identify(( )) expression will evaluate to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0:true and removing the leadingrespectively 1:false on the rest of lines so only. So you could iterate over the file names remain, one per linefiles and run this test, adding the positives to an array which is then pipe that listpassed to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2)as arguments:

identify -format '%[fx:args=(h>400)
for &&f w>400)]:%i\n'in ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-do

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c(( \
'identify$(identify -format "%[fx'%[fx:(h>400 && w>400)]\n" "$0" |]' grep"$f") -q)) 1'&& {args+=("$f"} \; -print0 \
| xargs -0 done
mogrify -resize '400x400' "$args[@]"

If you're a zsh user see also this answer.

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer.

imagemagick fx operator allows filtering images based on height/width e.g.

(( $(identify -format '%[fx:(h>400 && w>400)]' image.png) ))

the inner command will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400 so the (( )) expression will evaluate to true and respectively false. So you could iterate over the files and run this test, adding the positives to an array which is then passed to mogrify as arguments:

args=()
for f in ./*.png
do
(( $(identify -format '%[fx:(h>400 && w>400)]' "$f") )) && args+=("$f"}
done
mogrify -resize '400x400' "$args[@]"

If you're a zsh user see also this answer.

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edited Apr 13, 2017 at 12:37

Community Bot

1

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer this answer.

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer.

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer.

added 12 characters in body

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edited Aug 8, 2015 at 13:42

don_crissti

85.6k
31
234
262

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer.

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer.

You could also use the fx operator to filter images based on height/width e.g.

identify -format '%[fx:(h>400 && w>400)]\n' image.png

will output 1 if the image is bigger than 400x400 and 0 if it's equal or smaller than 400x400...

Assuming sane files names (no newlines/spaces/tabs etc) you could use identify to print image names preceded by either 1: or 0:, process the output deleting lines that start with 0: and removing the leading 1: on the rest of lines so only the file names remain, one per line, then pipe that list to mogrify ... @- (the @ syntax was added in imagemagick v6.5.2):

identify -format '%[fx:(h>400 && w>400)]:%i\n' ./*.png | \
sed '/^1:/!d;//s///' | mogrify -resize '400x400' -- @-

Otherwise, with find you could print only the files with size > 400x400 and then pipe the result to xargs + mogrify (it's less efficient as it runs a shell for each file but it should work with all kind of file names):

find . -maxdepth 1 -type f -name '*.png' -exec sh -c \
'identify -format "%[fx:(h>400 && w>400)]\n" "$0" | grep -q 1' {} \; -print0 \
| xargs -0 mogrify -resize '400x400'

If you're a zsh user see also this answer.

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answered Aug 6, 2015 at 19:21

don_crissti

85.6k
31
234
262

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