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Topic: Digital projection. A question
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Tom Photiou
Film God
Posts: 4837
From: Plymouth U.K
Registered: Dec 2003
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posted November 19, 2017 11:18 AM
Thanks again for the feedback. Dont get me wrong here chaps, it's not making the films i view impossible, on the contrary, the majority i view are excellent. Here is a screenshot from the shinning, its taken with a mobile phone but you need to zoom in to see what i am trying to explain, look at the light parts and you can probably make out what i would call waterlines, (possibly the chicken wire effect), on the actual viewing they are very prominent on this particular film as it is very bright and even the dark scenes are lit very brightly, especially visible on the snow scenes.
As you can see the image is actually very very good, Hey Mark, definatly not grumbling here, i am just trying to see if i can get shot of these lines. We also viewed the remake of the magnificent 7 the other night, it was brilliant to see it up on the big screen but that film showed very little in the way of the waterlines.
You may need to save the image and zoom in, unfortunately the image doesn't show it the way the eye does.
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Rob Young.
Phenomenal Film Handler
Posts: 1633
From: Cheshire, U.K.
Registered: Dec 2003
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posted November 19, 2017 02:02 PM
Tom, this is possibly banding, where one grade of the image moves to a lighter or darker shade, but rather than being a smooth transition, a banding effect occurs.
Is it also visible on, say scenes with lots of blue sky, where the sky moves from darker to lighter areas?
If so, it is possibly the image processing within the projector.
I once owned a relatively expensive Optoma DLP machine, designed for home cinema, which was truly dreadful in this regard, far worse than you are seeing.
Try looking at scenes with large areas of similar colour, but which move from brighter to darker areas and see if it is also there?
If it is the image processor, DVD will suffer more than Blu-ray.
Teaching to suck eggs I know mate, but do check that the Blu-ray player output is set to 1080p / 24 Hz, assuming that is the capability of the projector.
EDIT: Just looked up the spec. It's classed as HD ready, not full HD as the panel is 1080 x 800.
Full HD is 1080 x 1960 and HD ready is usually classed on a video display as 1080 x 720.
So maybe also try re-setting your player to 1080 x 720 output resolution?
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