How to adjust my epson HC8350 gamma? - AVS Forum
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post #1 of 3 Old 12-30-2012, 10:47 PM - Thread Starter
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Hello, everyone.
Recently, I get i1 pro. So, I start calibrate my projector epson HC8350.
Following is my gamma figure:

Obviously, at IRE 50%, gamma start decrease.

Following is HC8350 gamma adjust menu :


I select customized, but I do not know how to adjust.
Y axial stand for signal output level.
X axial stand for signal input level.
I can adjust 10 point like the drection of right of this figure , But I do not know should I increase or decrease output level of every point . who can teach me? thank you very much.
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post #2 of 3 Old 12-31-2012, 12:53 AM
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At the risk of sounding unhelpful, I would take note of the default values, tweak one of the values a few notches and then rerun the sweep and see how the gamma had changed at that particular ire. This should help you figure out which way you need to go.
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post #3 of 3 Old 12-31-2012, 02:16 AM
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Quote:
Originally Posted by a9155040 View Post

Hello, everyone.
Recently, I get i1 pro. So, I start calibrate my projector epson HC8350.
Following is my gamma figure:

Obviously, at IRE 50%, gamma start decrease.
Following is HC8350 gamma adjust menu :

I select customized, but I do not know how to adjust.
Y axial stand for signal output level.
X axial stand for signal input level.
I can adjust 10 point like the drection of right of this figure , But I do not know should I increase or decrease output level of every point . who can teach me? thank you very much.

In its simplest term, higher light output would mean a lower gamma value; and vice versa. So if a mesurement point has a measured gamma value lower than your target (meaning you need to raise your gamma), you will need to lower the light output. That's it.

The challenge here is that you need to figure out, for your particular Epson's projector model, what each point corresponds to what input level (or levels). It may be as simple as the leftmost point corresponds to 10% input level; the second leftmost point corresponds to 20% level, and then 30%, 40%, etc. But it may be not as straightforward as that - meaning one point may affect a range of input levels (say the rightmost point may affect 70% - 90% levels - just for example). You need to try that out by yourselves.

The following link may help:
http://www.avsforum.com/t/1134710/epson-calibration-guide-1080-1080ub-6100-6500ub-7500ub#post_16166537
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