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Originally Posted by Jerry Skrocki  Ditto....
Karl Lang:
"Take notice of the fact I am using the term “spectroradiometer” not “spectrophotometer.” A spectrophotometer measures reflectance and is used on surfaces or printed materials. A spectroradiometer measures radiation such as that from an emissive display like a CRT or an LCD.My experience has shown that to accurately calibrate a display with a spectroradiometer you need to spend at least $10,000 on the device." |
An EyeOne Pro or similar device is BOTH. That's how one can use it to measure patches to build profile targets OR use it to profile a display. GretagMacbeth has a patient on an instrument that is both a Spectrophotometer and a Spectroradiometer in one unit.
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His conclusion:
"A laboratory spectroradiometer is an invaluable instrument when you need to measure an unknown light source. Nothing is more accurate or more expensive. When your color measurement task involves a source of known characteristics, a “purpose built” colorimeter will provide greater accuracy at a much lower cost. The colorimeter is always the superior solution if you need to measure the full gamut of such a device with speed and accuracy."
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And where do you hear him saying that a colorimeter with filters not appropriate for the display is in any way useful or superior to a Spectroradiometer?
You can try to put me on the spot by using Karl's piece, its not going to fly (for one, Karl WAS the tech editor on my book).
This is very simple. A colorimeter with mismatched filters will NOT preform as well, it will actually fail to work correctly where as a Spectrophotometer like the EyeOne Pro, in its spectroradiometer mode will easily out preform said colorimeter.
On can see this today or one could take an older colorimeter with filters that are expecting an old CRT and see equally awful results when used on an CCFL LCD.
The illuminant in many, modern white or full color LED's will cause some (most) Colorimeters to produce awful results. Which is what I thought we were talking about no? Or was my first post difficult for you to understand:
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The other issue is the displays pretty much suck and, if LED, very difficult to calibrate and profile.
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You wrote:
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Most people agree that a colorimeter is still the superior instrument for accurately calibrating/profiling monitors.
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Would you like me to ask Karl to tell you personally that a colorimeter in the situations being discussed (wrong assumption of filter matrixes) will be inferior?
Linear Mode
