Into the (open) source


There is a landscape portrait in the background of Windows XP?


It seemed right to celebrate the retirement of long-lived operating system from Microsoft so far with a post that reveals a curiosity.

The urban legend that the photo would default on XP desktop has been taken directly from Bill Gates during a holiday in Switzerland. In fact, the authorship of the photos has always been recognized as the professional photographer Charles O'Rear, that eventually passed along a highway in California and was struck by the vision of a lush green hill with blue sky.


Canon Club Italy asks for help


Today's article is different from others, but I feel I have to write.

I have long subscribed to the community "Canon Club Italy", an amateur site where users have the opportunity to meet, commodity exchange, dispense advice and get information. The classic community, oriented to photography. Since the opening of the site to date, the owner and maintainer of the server has had several difficulties.


Tutorial: guard against unauthorized use of our photos with Gimp


In the previous article we mentioned the technique of quickly '"invisible watermark", a technique that would allow us to prove paternity of a digital photograph. The operation (as already described) is simple. The underlying principle of all is to have a picture "x" (my original photo I just have to keep) and create a picture "and" (the photo that contains the watermark invisible to circulate in internet). To prove to be the author of the photo just to compare a particular procedure by superimposing the two graphics immagni. Magically comparirà il watermark with our name and copyright information.


Some solution to protect your images on the internet


Those who describe today are the most common methods that allow us to, in the event of litigation, of resolve the issue related to copyright images.

The International Law (to Berne Convention for the Protection of Literary and Artistic Works) states that the artistic rights to the work resulting from the ingenuity and creativity can be attributed to the people who made. Forever. This means that if today I compose a piece of music will always be my, I can decide whether to play it without receiving compensation, but the author is me and to me that specific work must always be attributed. The same mechanism applies to the photograph (on condition that the photo is understood as a 'artistic work).


Photography: “time lapse” con gPhoto2


Today I raised the issue of "time lapse", a particular photographic technique that through the sequence of shots allows the creation of small animations. To get an idea of ​​what the time lapse, I refer you to spectacular video easily available on youtube, or rather those dedicated of this page.

For the good time lapse is necessary to automate the process of shooting, in practice less personal things are entrusted to the skill, the better the end result.


Photography: remote shutter release with gPhoto2


In today's tutorial we see some small function gPhoto2, a program command-line oriented * NIX systems which in addition to other functions, allows us to access some of the functionality "hidden" (or non-advertised) of our cameras.

It should be stated at the outset that not all cameras are supported. The complete list is available on the manuale online application.

The operation is very simple. Configure the camera (io face you Canon EOS 20d) so that the USB connection is of type PTP (under the menu "Communication" - "PTP").


Resize multiple images in one go


Resize Images, since the photo editing programs have become part of the routine of the average, is a task as simple as trivial. It is used especially for smaller size is available save bandwidth on the transfer of the file: a smaller image will load faster and also to use the pictures on the web is not required high resolution. The problem arises when we have a considerable number of images to be resized, open them one by one can become quite long and tedious.


Graphics: interpolation to resize images with Gimp


Inspired by the comments to one of my old article, write a short guide to clarify any questions on 'graphic interpolation. The short article today will speak only interpolation from the point of view of the graphic software, but it must be pointed out that the interpolation is first and foremost a method for detecting new points on the Cartesian plane, starting from a set of data points in the hypothesis that all the points can refer to a function f(x) of a given family of functions of a real variable.


Photography: some basic principles


When we speak of "photography" not only talking about a vile mechanical process by which the light is captured by a sensor, turned in electrical pulses, salvata su una memory and made available to the vision. Of course we also talk about this, but especially of "composition", in a sense of "art".

For the success of a photo should be aware a few simple rules that if applied will give us the advantage of not having to transcend from the original photo in post production.


Lighting effects to images with Gimp and the pack “Lomo Light Leaks”


Today I report an interesting site from which I often take inspiration for the writing of my tutorials. The site is, and as you can easily guess from the name of the domain is a site full of resources for PhotoShop, usable for most of the cases even with Gimp.

Today we see the "Lomo Light Leaks" pack, a collection of effects to add to their photos to make them look old. In pratica si tratta di 71 different images with the effect "flare" or reflex lenses. To apply the effect to the picture you want, simply open the "Light Leak" as a new layer overlaid on the main and change the mode from "Usual" a "Screen". I also recommend you to resize the "Leak" to be applied to the size of the main image.