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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…)

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…)