Watermark of the logo which is surely superimposed on the thumbnail of the photographic material sales site ( stock image ). This is a self-defense measure that each company is doing because it is not used without permission by quality pictures. It is a very difficult task to actually eliminate this watermark by making full use of Photoshop's stamp tool etc. Depending on the photograph, it is not easy to say that big watermarks overlap at important places.
But According to the uber-gizmo, Google has been developed in-house algorithm has released an easy way to remove the watermark.
Learn more about the Effectiveness of Visible Watermarksvideo by Tali Dekel.
According to the Google Research Blog, try loading stock photos with the same watermark in the computer in large quantities and try averaging the pictures. Then, the synthesized photograph becomes the background, and it becomes noise only because all colors are mixed. However, since the foreground watermark is absolutely at the same place, the location information will naturally rise up where the watermark should be removed. Actually, this will be a security hole in the photo.
On the other hand, the watermark itself is created by an alpha channel that expresses the opacity of the pixel. There are difficult calculation formulas, but in order to eliminate translucent watermarks, generate alpha channels of the same shape, apply them in a fixed watermark position, apply the counterparts, and automatically re- adjust opacity We build it.
In this way Google can propose a solution because it can be easily removed by copyright "using the same watermark every time".
It will randomly distort the shape of the watermark even by 1 pixel.
By doing this, you will be able to prevent stock plagiarism. Stock photo companies may be scales from the eye.
