(Soft) edge blending – meaning and function
If you want to create an image or video using several projectors, the (soft) edge blending function is recommended to enable the most seamless and invisible transition possible between the projectors. Soft edge or simply edge blending is often used in digital signage for the optimal presentation of presentations and in conference room technology.
How (soft) edge blending works
Edge blending is used to create a larger image or video or to be able to display it appropriately. For example, if you want to display a video in 3:1 format but your projector has a 16:9 format, it may be worthwhile for you to set up two projectors with a 16:9 format next to each other. This way, you can display the video in full size, sharpness and resolution without neglecting one or more of the factors.
In edge blending, two or more projectors are set up next to each other so that their projections on the screen overlap at the corners. There must be no gap, as the image should be complete. However, an overlap is completely normal and necessary. As soon as the projections overlap, however, these areas are much brighter than the rest of the image. This is because there is double the brightness at the overlaps due to the double irradiation of the wall.
So-called edge blending is used to prevent the overlapping projections from being brighter than the rest. The overlapping corners are adjusted either manually or automatically until the transition is no longer visible. You can imagine the whole process as being similar to setting various values on a projector, such as the brightness at the overlapping corners, to the negative range.
In this way, the overlap of the two projections also has the same brightness values as the rest of the image. This means that viewers can no longer tell the difference and it appears as if they are seeing one large image.
Edge blending using selected projectors and software
Theoretically, there are no limits to your imagination when it comes to edge blending. You can stack numerous projectors next to and on top of each other to create a breathtakingly large and sharp image. If your projectors have the edge blending function right from the start, this can also be set in no time at all using the right software. Simply select the projectors and the „Edge Blending“ function in the software and, as a rule, the projectors will take care of the calibration themselves.
Edge blending: very simple with ComPeri
If you are interested in purchasing projectors and have any questions regarding the possibility of an edge blending function, we will be happy to help you. ComPeri has been your contact for more than 25 years for conference room and media technology in the large and medium-sized business sector;We are happy to support and advise you in the selection of the optimal software and hardware.
The optimal interplay of all technology is one of our specialties – We take care of the design, consulting, installation and subsequent maintenance of all your electronic devices and software. Our customers include educational institutions, museums, hotels and companies. When it comes to digital signage, presentations or conference room technology and much more, we are there to advise you.