Bulk rotate images using EXIF data

Using a simple command line command it is very simple to rotate any number of images using the exif data (hopefully) contained in the image. Most cameras will save the exif data and include the camera rotation when the photograph was taken.

sudo apt-get install jhead

then when we run the following command in the folder it will losslessly rotate the photographs that need it.

jhead -autorot *

Job done :]

Use exiftran to transform jpeg images

Exiftran is a command line utility to transform digital image jpeg images. It can do lossless rotations like jpegtran, but unlike jpegtran it cares about the EXIF data: It can rotate images automatically by checking the exif orientation tag, it updates the exif informaton if needed (image dimension, orientation), it also rotates the exif thumbnail. It can process multiple images at once.

exiftran -ai *

This will transform all the images in a folder, rotating them to the correct orientation as defined by the exif data from the camera and replace the original, assuming your camera can sense and write the orientation into exif data.

exiftran -i9 *

Transform the image through 90degrees (to the right) and overwrite the original.

exiftran -i2

Transforms the image through 270degrees (to the left) and overwrite the original.

I have adapted this into two scripts in my nautilus-scripts folder "/home/subbass/.gnome2/nautilus-scripts/" you can make two scripts in this place using the following code and just changing the exiftran command to rotate left or right in each of the scripts.

#!/bin/sh
for arg; do
filetype=`file -i "$arg"`
if [ -n "`echo $filetype | grep -i '.jpg' `" ]; then

exiftran -i9 "$arg"

else
convert -rotate 90 "$arg" "$arg"
fi
done

The convert at the end is to convert other image formats without me requiring another set of scripts, feel free to omit this if desired. Always do a small test before setting any script to work on large numbers of images, I don't want to be held responsible if your exif data gets nuked.

Use convert to add a border to multiple images in the command line

Ok, so you you have taken a bunch of photos with your new camera and what do you know, some of them are half decent. I use this after I have copied photo's I want to print or photo's that I am sending to flickr or deviant art to a seperate folder as it really adds a finishing touch, I copy them to a seperate location so I know exactly which ones I am printing/uploading and don't omit any.

Now you could easily do this in The Gimp, load each image and enlarge the canvas followed by a fill and then resave the image. This is linux though and we can do things a heap simpler than that!
First install Imagemagick:

sudo apt-get install imagemagick

Or install it via Synaptic or your package manager.

Then use this simple script,

be aware that you should operate on copies as this does overwrite the original, as noted above I only do this on photo's I have copied for printing/uploading.

for img in `ls *.jpg`
do
convert -bordercolor white -border 50x50 $img $img
done

Easiest to pop it all into a bash script, or just close it up separating the commands with semicolons into a one liner eg.

for img in `ls *.jpg` ; do ; convert -bordercolor white -border 50x50 $img $img ; done

If your camera uses a different extension then adjust the .jpg accordingly.

Adjust "50x50" to whatever you feel adds a nicely sized border, and feel free to change the border colour (black for instance). If you want to get creative stack up the converts to add a thin black border before a larger white border or whatever you fancy.