May 29, 2016, 09:50:50 AM

Author Topic: How to understand DxO scores  (Read 2090 times)

dilbert

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How to understand DxO scores
« on: June 08, 2012, 11:48:51 PM »
This story was published at the beginning of 2011 but it should serve to illustrate why the DxO scores are useful:

http://www.luminous-landscape.com/essays/dxomark_sensor_for_benchmarking_cameras.shtml

... as they tell an important story (once you get past the fanboyism.)
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How to understand DxO scores
« on: June 08, 2012, 11:48:51 PM »

briansquibb

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Re: How to understand DxO scores
« Reply #1 on: June 09, 2012, 02:13:19 AM »
This story was published at the beginning of 2011 but it should serve to illustrate why the DxO scores are useful:

http://www.luminous-landscape.com/essays/dxomark_sensor_for_benchmarking_cameras.shtml

... as they tell an important story (once you get past the fanboyism.)

I love the way this article contradicts itself in the first page ....


neuroanatomist

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Re: How to understand DxO scores
« Reply #2 on: June 09, 2012, 12:50:08 PM »
Here's the problem:

"Documentation about the way the final DxOMark Sensor score is computed from Dynamic Range, Color Sensitivity and Low-light ISO scores is not currently available."

So, we have a single 'weighted average' number, with non-linearity in the calculation mentioned elsewhere in the article, and no information on the actual calculation, what is weighted vs. not, not even confirmation that the same weightings are universally applied.  That, IMO, renders the Sensor Score meaningless, a problem further compounded when people erroneously extrapolate that meaningless number to be a measure of overall camera performance.
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Re: How to understand DxO scores
« Reply #2 on: June 09, 2012, 12:50:08 PM »