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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…)

Photography: techniques for the reduction of “Digital Noise”

In today's tutorial we talk about photography. How many times has it happened to take pictures, affect them on the display of the camera and see them in good condition, then download them on the computer and realize the presence of the noise in the picture.

The digital noise present in the photo is the deterioration which can range from small disturbance barely visible, the disturbo “a puntini” very annoying to see how we will see in the next image it shows how the quality of the image may change, changing the ISO. (more…)