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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. (more…)

By TheJoe, ago

Tutorial: mosaic “a pallini” type 70 with Gimp

In today's tutorial we will see how to turn a colored photo in a pixel-art original, useful for creating large prints especially when the quality of the initial image will not let.

We begin with an image of your choice. For this tutorial I suggest colored images particularly because many of the details will be lost in the final result. (more…)

By TheJoe, ago

Tutorial: Effect “macro” a panorama with Gimp

In today's tutorial we deal with a particular technique, that will make our curious photos. To macro photography (or more simply “macro“) means the photograph of the small details to which the eye hardly pays attention. There will certainly have seen online, or in some magazines nature of some larger picture microscopic bugs, or the classic photo to’compound eye Fly. Everything is imperceptible at first glance, but with a good goal “macro” are unable to distinguish accurately even the compound eye.

In today's tutorial, however, do not deal with macro photography, but the blur resulting from macro to reality. All fiction, nothing macros for today. (more…)

By TheJoe, ago

Tutorial: Enlarge an image with little loss using Gimp

The tutorial Today is one of those simple tutorials that are exhausted in a passage. More than a tutorial would call advice useful to remember.

Let's say you have a picture medium / small, not suitable for printing, we want larger than twice. Until today I expanded work space with “Picture” – “Scale Image” and inserting the double values, but I just recently discovered a way to resize them in excess with a higher yield using G’MIC, the plugins that we had already discussed, that does it all.

Let's say you have a picture very small, 150×200 px. Of course we all know that is impossible to enlarge a small image without loss, and even this procedure is not without loss of information, on the other hand applies the small improvements to “simulate” magnification without loss. (more…)

By TheJoe, ago

Change the dpi / ppi of an image with Gimp

I often find myself having to create images that serve as separator content within prints, or some simple graphic effects created with tracked, or with letters. I'm thinking of something very simple, that surely even in the old schoolbooks we were used to seeing without realizing.

Occasionally, however,, I happen to create the new image, save, and realize that the work is finished the dpi is too low Gimp because those who apply by default are 72, excellent to the web but too little for a detailed Print quality. Today we see how increase the dpi of an image we have already saved with Gimp 72 dpi, and the portarla 300 (great for Print). (more…)

By TheJoe, ago

Il plugin Resynthesizer per Gimp

Who said that PhotoShop always comes before Gimp? The plugin we are talking about today was developed natively for Gimp, was then invented something similar to PhotoShop.

Maybe someone does not play the new plugin “Content aware filling” per PhotoShop. Well, “Resynthesizer” is an algorithm developed as a research project of the University 2001 subsequently led to plugin for Gimp long before that were created “Content aware filling“. But let's start from the beginning. Start by saying that “Resynthesizer” is a plugin that fully automatic removes by selection the objects in the picture if placed on a plot, filling the space Missing the selection with the same color of the background, trying to keep the texture uniform. This plugin can be very useful for example if we were to touch up the photo of a sunset sky with a pole in the foreground. (more…)

By TheJoe, ago

Tutorial: highpass filter con Gimp

Today we talk about “Highpass filter“, a technique widely used in modern advertising to make “soft” images.

Obviously for all the work will adopt Gimp as a program for image manipulation.

This tutorial applies to entities, faces, views and, as we shall see, is perhaps the most widely used technique in magazines advertising.

In this tutorial we work on a subject. The image comes from Flickr. (more…)

By TheJoe, ago

Shutter, utility for screenshots

I often find myself coming to terms with the screenshot, especially when I write a tutorial, or when I write about a new program the little known.

Until some time ago I used the internal utilities Gimp (“File” – “Create” – “Screenshot“), whose options allow you to choose to “photograph” whole screen, or window with the senza decorations, or to set a delay in the event that we “photograph” of menu in sistema. (more…)

By TheJoe, ago

Tutorial: golden effect on the water with Gimp

The wave of the tutorials for Gimp today, with a simple process but we'll see how effective “give” of warm colors to any photo with the instrument “Gradient Map“.

The knowledge base for this tutorial are minimal, it is enough to know the use of mode of the layer stacking.

Personally I think are most appropriate for this tutorial with pictures very sharp reflexes, use a photo without reflections is lawful, but the result will surely be different. We will use the following picture from Flickr. (more…)

By TheJoe, ago