The wide world of edge blending

You want to get an extra wide image across the wall - then you’ll probably need to combine two or more projected images to make a single seamless image. This is called edge blending.

The images are firstly overlapped and then visually joined together using an edge blending processor/software, such as the Optoma Chameleon GB-200.  Once these are blended, it is imperative the projectors do not move. If they do, your edge blend will come out of alignment.

So, before you start there are a number of factors to consider.

•    Partition walls, mezzanine floors and suspended ceilings are not ideal environments as they are subject to movement and vibration.
•    Large open spaces such as exhibition halls may get air movement, which may affect alignment.
•    Long mounting arms will amplify any movement so should be avoided.
•    Content resolution needs to match that of the projected resolution. Content with a resolution dissimilar to the combined native resolution of the blended projectors will make set-up more complex and cause the image to be stretched or distorted.
•    Have a minimum overlap percentage of 20% and avoid text on the overlapped areas.
•    Avoid people touching the projectors.  Can visitors reach the installation? Would cleaners or contractors on site knock the projectors?

Further help
Take a look at our handy guide.

Or to see a step-by-step video tutorial of edge blending using the Chameleon GB-200 visit the Optoma EMEA YouTube channel:
•   Manual blend of two or more projectors
•   Auto blend for two projectors

Stacking made simple

Ever more installations and exhibitions are choosing to stack projectors to generate a higher brightness.  Our blog looks at the benefits of stacking and how to do it.

Why stack projectors?
When a project needs greater brightness there are real benefits in stacking projectors. Stacking overlays images using multiple projectors to produce a higher brightness.  This has added benefits of reducing the overall cost of installation and increasing reliability.  

A single projector of equivalent brightness is generally more expensive and bulkier.  Stacking therefore enhances portability with smaller, lighter units which are easier to transport and install.  It improves reliability (if one unit fails, the second unit will still work) and it allows scalability with the ability to add more projectors if higher brightness is required.

What would I need to stack projectors?
Stacking can be achieved using a GEO board, the HQView processor range or the Chameleon GB-200 image blending and warping processor.

The GEO board is exclusively compatible with the Optoma EW865 and EX855 projectors, which are ideal for a side-by-side stacking setup due to their innovative airflow design.  The HQView range and Chameleon GB-200 are compatible with any projector.

Simple stacking
Simple stacking uses two projectors and overlays a master image with a larger second image, reduced in size to match the master.  This does not need a stacking frame and could use standard ceiling mounts. It needs just one GEO board, HQView processor or Chameleon GB-200.  

At ISE 2014, Optoma demonstrated simple stacking using two 6,000-Lumen EW865 projectors to project HD video content at 12,000 lumens.  Stacking projectors in this way significantly reduces the complexity and cost of a 12,000-lumen solution.

Advanced stacking
Where additional clarity and sharpness are critical, there is the added option for advanced stacking.  This gives sub-pixel control of the alignment of both images with up to 289 individual points of adjustment on each projector.  This uses warp grids via a PC tool and is possible with either the HQView range or Chameleon GB-200.  
Optoma provides a range of edge blending, stacking and mapping solutions, tailored to the exact requirements of each project.  Find out more about Optoma’s ProScene solutions.