Edge Blending companies want to add point specific Gamma in the blend zone. If they added say an adjustment for each IRE at a 21 point step it be totally seamless .
I notice that everybody sets up their projection screens with the bottom at waist height or above.
I prefer placing the bottom of the screen at 100mm above "floor level", which creates a much more immersive experience with the picture. You are on the edge of the field in football games, with the best seat in the house on all plays.
I build Cinemas in townships and rural areas in South Africa, and also have a Home Cinema/Theatre installation company.
Thanks for the interest and the questions,
We are using standard NEC LED projectors. We are busy working on going to "Glasses Free 3D" in conjunction with a prof at University of Johannesburg's Video Dept.
We are placing the movies onto a hard drive which is locked inside a safe with a Media Player. (only HDMI output, to prevent piracy). No BluRay or DVD players and no network access to the media stream by the cinemas. The cinema can only "play" any movie they choose which is already on the media system. Media system is updated by the Holding Company, - me.
The Sound System is Onkyo 9.2 THX with doubled speakers on each channel. Surround Sound is Awesome in the Cinema due to the acoustics being totally neutral. You can talk to each other at normal voice level, from the front to the far back corner of the cinema.
Remember, its a Job Creation Project for poor people in South Africa, and an education centre, and a Policing centre, and an Aid Centre, with 5 x 3m outdoor screens in front of a 12m x 5m stage situated on the roof.
The Outdoor screens are used for "Free" Sports, News and Movies & Shorts created by the Local community film makers.
We are just trying to get around the corruption by certain individuals in government departments. (Only question they have is "Whats in it for ME ?).