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Commands tagged Image processing

Terminal - Commands tagged Image processing - 12 results

find . -iname '*jpg' -print0 | xargs -0 exiftool -warning; find . -iname '*jpg' -print0 | xargs -0 jpeginfo -c

2013-01-28 16:44:19

User: unixmonkey46191

Functions: find xargs

Tags: Image processing image photo jpeg corrupt

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Find corrupted jpeg image files

This checks jpeg data and metadata, should be grepped as needed, maybe a -B1 Warning for the first, and a -E "WARNING|ERROR" for the second part....

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convert /home/user/file.jpg -resize 800x533 -strip -quality 80 -interlace line /home/user/web_file.jpg

2011-10-10 08:45:04

User: vtrone

Tags: Image processing

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Convert high resolution JPEG for web publication

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jhead -autorot *

2011-07-31 21:59:02

User: repentorperish

Tags: Image processing images jhead rotate digital cameras

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Autorotate a directory of JPEG images from a digital camera

Digital cameras embed EXIF data into the images they create indicating which orientation the photo was taken in. Some viewers and editors are smart enough to read this, but many are not (and web browsers ignore it). jhead is one of not many tools available that can losslessly rotate jpeg images. This command reads the EXIF orientation of each image, and rotates it if necessary.

convert -density 300x300 input.pdf output.png

2011-01-28 00:36:31

User: billmakesbooks

Tags: Image processing ImageMagick pdf png

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Convert a single-page PDF to a hi-res PNG, at 300dpi

If you skip this part:

-density 300x300

you'll get a very lo-res image.

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for a in `ls`; do echo $a && convert $a -resize <Width>x<Height> $a; done

2009-08-02 22:35:24

User: leavittx

Functions: echo

Tags: Image processing ImageMagick photo photos for batch convert

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Batch image resize

Resizes all images in the curent directory to x resolution.

It is better than `mogrify -resize *.jpg` because of independence from extension of image (e.g. .jpg and .JPG) (:

find . -name "*jpg" -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR"

2009-06-03 22:08:48

User: vincentp

Functions: find grep

Tags: Image processing image photo jpeg corrupt

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Find corrupted jpeg image files

Finds all corrupted jpeg files in current directory and its subdirectories. Displays the error or warning found.

The jpeginfo is part of the jpeginfo package in debian.

Should you wish to only get corrupted filenames, use cut to extract them :

find ./ -name *jpg -exec jpeginfo -c {} \; | grep -E "WARNING|ERROR" | cut -d " " -f 1

for i in *jpg; do jpeginfo -c $i | grep -E "WARNING|ERROR" | cut -d " " -f 1 | xargs -I '{}' find /mnt/sourcerep -name {} -type f -print0 | xargs -0 -I '{}' cp -f {} ./ ; done

2009-05-07 00:30:36

User: vincentp

Functions: cp cut find grep xargs

Tags: Image processing image copy jpeg jpg corrupt sync

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sync a directory of corrupted jpeg with a source directory

Find all corrupted jpeg in the current directory, find a file with the same name in a source directory hierarchy and copy it over the corrupted jpeg file.

Convenient to run on a large bunch of jpeg files copied from an unsure medium.

Needs the jpeginfo tool, found in the jpeginfo package (on debian at least).

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convert {$file_in} $ +clone -background black -shadow 60x5+10+10 $ +swap -background none -layers merge +repage {$file_out}

2009-05-06 10:19:39

User: kureikain

Functions: merge

Tags: Image processing ImageMagick shadow

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Add a shadow to picture

Please take notice that if you are going to use an JPG file for shadow effect,

let change -background none to -background white!

Because -background none make a transparent effect while JPG doesn't support transparent! And when viewing, you will get a bacl box!

So we will use an white background under! We can use other color as well!

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convert -rotate $rotate -scale $Widthx$Height -modulate $brightness -contrast $contrast -colorize $red%,$green%,$blue% $filter file_in.png file_out.png

2009-05-06 10:14:22

User: kureikain

Tags: Image processing ImageMagick

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Scale,Rotate, brightness, contrast,...with Image Magick

rotate: the rotate angle width, $height: width and height to scale to birghtness: change brighness

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identify -ping imageName.png

2009-04-03 13:18:33

User: unixmonkey3142

Tags: Image processing ImageMagick

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Use ImageMagick to get an image's properties

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identify -format "%wx%h" /path/to/image.jpg

2009-02-16 13:39:20

User: root

Tags: Image processing

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Determine an image's dimensions

Simple use of ImageMagick identify function.

mogrify -resize 1024 *.jpg

2009-02-11 00:01:29

User: mitzip

Tags: Image processing ImageMagick image batch resize

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Resize all JPEGs in a directory

This command requires the imagemagick libraries and will resize all files with the .jpg extension to a width of 1024 pixels and will keep the same proportions as the original image.

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