Tux Training

feh is highly configurable. For a full list of options, run feh –help.

Image Browser

To quickly browse images in a specific directory, you can launch feh with the following arguments:

$ feh -g 640x480 -d -S filename /path/to/directory

• The -g flag forces the images to appear no larger than 640×480
• The -S filename flag sorts the images by filename

This is just one example and there are many more options available, should you desire more flexibility.

Continue reading ‘Use Feh to browse images and set wallpaper’ »

I found myself spending a ton of time adding drop shadows to images. Using a simple command I was able to create drop shadows in seconds.

Note: You must have Imagemagick installed for this command to work. Debian/Ubuntu users can use apt-get install imagemagick.

Most digital cameras will insert metadata into images. This metadata is stored using the exchangeable image file format (EXIF) and can contain camera specifications, exposure settings, thumbnails, GPS coordinates and more. This article outlines the command line tools you can use for reading and removing EXIF metadata from JPEG images.

Continue reading ‘Read & Remove EXIF Data From the Command Line’ »

hugin is a cross-platform open source panorama photo stitching program developed by Pablo d’Angelo and others. It is a GUI front-end for Helmut Dersch’s Panorama Tools and Andrew Mihal’s Enblend and Enfuse. Stitching is accomplished by using several overlapping photos taken from the same location, and using control points to align and transform the photos so that they can be blended together to form a larger image. hugin allows for the easy (optionally automatic) creation of control points between two images, optimization of the image transforms along with a preview window so the user can see whether the panorama is acceptable. Once the preview is correct, the panorama can be fully stitched, transformed and saved in a standard image format. A long list of language versions helps to get familiar with the complex possibilities since tweaking of a broad set of parameters can be used to achieve outstanding results.

Continue reading ‘How to stitch two photos together with Hugin’ »

ImageMagick is a powerful command line image processing package with a number of features you could install it using the following command :

sudo apt-get install imagemagick or sudo yum install imagemagick

After installation is over to convert say sample.pdf to sample.png issue the following command

convert sample.pdf sample.png

convert sample.pdf sample.jpg

Now if sample.pdf has multiple pages ImageMagick would convert each individual page into a separate file for example : 1st page as sample-0.png , 2nd page as sample-1.png and so on .

Source

This will be the first in many Gimp tutorials for TuxTraining.com. Gimp is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages. Most distributions come with it preinstalled and if it is not, it’s in the repo’s of your distribution.

In this tutorial we’re going to learn how to do drop shadows for an image. First we’ll start with a base image that I’ll provide. It’s a png with a transparent background. This should work on any shape or image you have already though. Go ahead and download this picture and open it in Gimp.

Continue reading ‘Gimp Series: How to make drop shadows’ »