SMART III - Video Calibration Toolkit

Steve Smallcombe's SMARTAVTWEAKS site


The most common mistakes people make using SMART

The most common mistakes people make using SMART
1. Aim the detector at the screen. This is wrong. Aim the detector at the projector, as the light coming from the screen is almost always too dim to make accurate measurements. The screen does not really affect the color balance of the projector since screens are color neutral (including gray screens). Since screens are also passive that don’t effect gamma tracking or shadow detail either.

2. Ignore all those charts that are part of the SMART spreadsheet. Ideally you could just look at the advice that SMART gives, but you are losing an important source of information, in the case where you make a mistake, the charts will often tell you what you did wrong. When people send me their spreadsheets for help, I look at the charts. If a gain in increased for a color, that color’s traces should go up. If a filter is added, then the blue and green traces (red filter) should go down. If the traces are very flat at all the high IRE level, then the contrast is much too high. Learn to look at the charts as you do the various iterations of the SMART process. You will not only learn how your projector works, but you might also catch a mistake and save some time.

3. Forget to select the relevant custom color temperature (SONY 10HT and 11HT). I have seen this may times now. A user will modify custom 1, but forget to select it as the active color temperature in the first menu page. Obviously, in this case the changes made to the various settings won’t apply.

4. Run with the contrast set much too high. I have seen many runs where the various color intensity traces are completely flat at the high IRE levels. This often happens after people have boosted the gain settings, e.g. 255 for a 10HT, but not reduces the contrast an equivalent amount to prevent blowing out the high end. Look at the traces!

5. Put the detector too far from the projector. If the detector is too far from the projector, then the light falling on the detector can be pretty dim at the low IRE levels. This leads to very long settling times and long runs in general. Generally 2 to 3 meters should be about right.


Home Page

Introduction to how SMART works

Frequently Asked Questions about SMART

Here is what's new is SMART III version 1.2

The Dummies Guide explains the SMART process in a non-technical way

Buy SMART III at EnhancedHT - your exclusive source for all SMART products

Not sure you are ready to try SMART yourself? Have a certified SMART person do the calibration for you

Having trouble? Learn the most common mistakes people make using SMART

Read about using bias lights to improve perceived black levels.

Here are some additional tips for the SONY projectors and solution to common problems.

Copyright 2001-2005 Steve Smallcombe