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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. (more…)

Tutorial: the paradox photo (the “Droste effect”) with Gimp and MathMap

Today's tutorial is a cross between photography, graphic and Mathematics. Photography because we start from a real photo, and a good photograph is the beginning of a good job, graphic because of the various tweaks that as we make any and Mathematics because the effect scomoderemo today follows strict mathematical rules, nothing is left to chance. For this tutorial we will use Gimp and its plugin MathMap. (more…)

L’Orsa

Today's article is not intended nor survey, neither a review nor a guide. On a recent visit by the parties of Saturnia, in an area where countries are very distant between them and the few roads that connect them are poorly lit at night.

If this was first aired a “danger” for us that we were (the usual nonsense of the genus: “and if the car battery is discharged?“, “and if we end up off the road?“) it is then translated into a Failure to light pollution, which made clearly visible Milky Way and most of the stars that “home” usually I do not see. (more…)

Tutorial: add a rainbow to a photo with Gimp

The other day the light in the sky was pretty weird, the weather was very variable: half an hour of rain with peaks and relapses, and also sprazi of calm here and the. You do not always happen the good fortune to find a time like this, but a few days ago I happened. In these weather conditions it is not uncommon to be able to take a picture blacks with clouds in the background and the foreground in light, the clouds permit.

Today we see how apply a rainbow ad a photo. Of course you can use any photo, but specifically it is more truthful a picture with the sun behind us, and the background of the picture itself clouded. (more…)

Tutorial: stained effect / burned with Gimp

The tutorial for today came a little’ per case and a powder’ because I was trying another effect to apply to your photo. The final effect will be staining of the picture (stains confused with burn marks) I think responding to reality, but let you judge users.

First open a photo you might pay at work. We'll turn it in a few easy steps. (more…)

Finished work

Tutorial: Perspective correction (the linee cadenti) with Gimp

In this tutorial we deal with correct perspective a photo with Gimp. Often (especially in the narrow streets) having to take pictures of monuments or facades of tall buildings, having available a limited field for framing. It is clear that we will be closer to the monument over the photo will be “far” from being correct axonometric. The perspective correction is also called correction (or modification) the falling lines. This is because taking a photo close to an architectural element gets the impression that the monument is falling backward (the architectural lines converge upwards.

What we will do today is “straighten” the lines of a facade, Gimp well as we should have another couple of plugins: “MathMap” and “FX-Foundry“. (more…)

Tutorial: tool “Clones” the GIMP

Now let's see how the tool works “Clones” Gimp. Often we will ever need remove the elements from a photo taken which disturb the fluidity. This thinking an ad light pole, a bush, a chewed gum e appiccicata sul muro. Requirements can be many, but for this tutorial I decided to show its use for remove objects from the background. The instrument “Clones” does nothing but copy a portion existing in the picture (usually a reason fairly uniform) and cover areas that we do not want in the picture. (more…)