This is something, what does not deal directly with Magento, But since you also like to set one or the other image to the article, It touches on the topic at least slightly.
Das Problem: It can be made pretty pictures (usually with texture such as e.g.. Material), which then suddenly on the Montior such a (painful for the eyes) Grating effect of the so-called “Moiré Effekt” show, which in digital photography / Scan etc.. at home.
In brief: Different lattice structures are superimposed, the minimum shift, is it visually to the dismay. Who wants to learn more about, this may for example Wikipedia do.
One can, for example, the moiré effect in Photoshop etc.. with “Median” attenuate.
Strong but it can also occur, when working with Irfan Views batch processing multiple images together and then ansich nice sees the result. Here again an example:
Moiré ohne Effekt (above) Moiré put Effekt (below)
Here is the same template once with IrfanView (below) been reduced in size and once with Photoshop (above).
This we could not explain first, but then came to a small hook in IrfanView, optimally solves the problem. Change in the batch processing, there “Advanced” and then click here “Use Resample function (better quality)” activate, So set the hook.
Subsequently, the moiré effect by the reduction as good as gone. Of course, if there was already a….
