What is the edge blending technology?

Posted by Vivian Wang on June 20th, 2019

Edge blending technology is to overlap the edges of a group of projectors and display a whole picture without gaps, larger size and higher resolution through fusion technology. The whole picture is like a projection. The complete picture of the machine projection.

When two or more projectors project a single image, some of the images overlap. The main function of edge blending is to cut the corresponding content to the corresponding projector and reduce the brightness of the overlapping part of the projector. To make the brightness of the entire picture consistent.

The emergence of large-screen edge fusion is mainly due to the market demand for large screen and high definition. In addition to providing larger screen size and higher resolution, edge blending technology can effectively shorten the installation distance of the projector and reduce the space requirements of the scene. In addition, curved, spherical, dome, multi-faceted immersive projection and other solutions can be provided, making the integration of large screen edges for exhibitions, creative displays, advertising, conferences, indoor panoramas, outdoor wall mapping for a variety of purposes. How to play.

There are usually two ways to implement edge fusion technology. The first one is integrated with a common projector through a pure hardware fusion device. The second type is integrated with a multi-panel projector through a picture cutting processor.

 What is the multi-projection projector?

Multi-projection projector refers to the built-in function of geometric correction and edge fusion of the projector itself. It only needs the device with front-end access screen cutting processing to realize edge fusion technology. At present, most of the products on the market are still in the concept stage, and the most professional and mature is the DHN multi-projection laser projector. The built-in geometric correction of DHN multi-projection laser projector meets or exceeds the performance of pure hardware fusion device, whether it is the number of grid points or the adjustment amplitude elasticity. The edge fusion range supports 10%-50% and can fully cover almost all the requirements on the market. Special built-in splicing fusion mode for chromatic aberration problems encountered in splicing fusion, especially for remote debugging for debugging complex segments. The product line covers 4500~7300 lumens, XGA/1080P/WUXGA resolution, and is the first brand in the current multi-projection projector category.

How to achieve edge blending with multi-proejctor?

The implementation of edge fusion mainly needs to implement three technologies:
1) Screen cutting and content expansion in overlapping areas
2) Align the overlapping area pixels by geometric correction
3) Eliminate the excessive brightness of the overlap region by the edge blending technique, so that the overlap region brightness and the non-overlap region are consistent.

The multi-projection projector has built-in items 2) and 3), and the edge blending can be realized by simply connecting the front-end screen cutting processor (implementing the first item). In the future DHN multi-projection laser projector will have built-in screen cutting function and support 4K@60hz or even higher resolution input. This will bring a wider range of applications to the projector.

 

Shanghai DIDON Industrial is one of the leading laser projector manufacturers and suppliers in the industry. Our products include laser projectors, HDBaseT Extender, video processor.