OMD now on DPreview's studio scene comparison

Started Apr 25, 2012 | Discussions thread
Anders W Forum Pro • Posts: 21,468
Re: OMD now on DPreview's studio scene comparison

peevee1 wrote:

Anders W wrote:

he chooses to base his calculations on the unweighted sum of the four channels and then relates the resulting value to the max recordable level. I prefer instead to base my calculations on the weighted average of the channel averages, i.e., (R + B + 0.5G1 + 0.5G2) / 3, but this difference between us is of little practical consequence for the results.

To better match the luminance as perceived by human eye (and encoded, for example, in JPEG's luma channel), the correct formula should be closer to 0.3R+0.6G+0.1B (or, if you will, 0.3R+0.3G1+0.3G2+0.1B.
Should not change the result much though.

Thanks! I wasn't really trying to match the perception of the human eye in this case, but merely trying to make sure the importance of the three channels was evenly balanced. As both of us note, however, the exact way we weigh things doesn't make much of a practical difference in this case.

 Anders W's gear list:Anders W's gear list
Panasonic Lumix DMC-G1 Olympus OM-D E-M5 Olympus E-M1 Panasonic Lumix G Vario 14-45mm F3.5-5.6 ASPH OIS Panasonic Lumix G Vario 7-14mm F4 ASPH +28 more
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