Observation 180009: Marasmius Fr.
When: 2014-01-20

Notes:
Habitat: humid rainforest

Substrate:

Collectors: D. Newman, J. Shay, E. Randrianjohany, R. Letsara, P. Rasabo

Collection #: JES118

More notes, microscopy and molecular data forthcoming

Species Lists

Images

548882
Canon EOS REBEL T3i + EF-S 60mm f/2.8 Macro + OttLite 515003 Rechargeable Task Lamp
1/5 sec, f/8, ISO 100
Color Corrected w/ X-Rite ColorChecker Passport
548883
Canon EOS REBEL T3i + EF-S 60mm f/2.8 Macro + OttLite 515003 Rechargeable Task Lamp
1/5 sec, f/8, ISO 100
Color Corrected w/ X-Rite ColorChecker Passport

Proposed Names

58% (1)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Whoops!
By: Martin Livezey (MLivezey)
2015-08-23 16:50:16 EDT (-0400)

I forgot to check the date on the observations!

I’m in New York!
By: Danny Newman (myxomop)
2015-08-23 11:37:05 EDT (-0400)

Check the observation date, and you’ll see how abysmally behind schedule I am with photos. The queue is about four years long…

Yes, it is a very interesting process
By: Martin Livezey (MLivezey)
2015-08-21 20:29:21 EDT (-0400)

I took a look at the ColorChecker product line today and it was a good education. Color balance has become a big issue for me with photography; the mechanism of depending of software to fix it seems too variable. I love the suggestion that this could be managed better than my camera or color balance software seems to with me at the controls. I am going to take the step of getting lightroom and carrying white and 18% gray cards into the field and then see where it goes. And thanks for the long post while you are in Madagascar!

Color
By: Danny Newman (myxomop)
2015-08-21 15:32:14 EDT (-0400)

Each studio image was shot under an OttLite 515003 Rechargeable Task Lamp (see image notes) with some tin foil to fill in shadows, on black velvet and millimeter graph paper, respectively. Despite the fact that, theoretically, the white balance should not change between studio sessions, each series of studio photos is still started and finished with a calibration shot of the ColorChecker against each background. Color temperature and tint values were manually adjusted to homogenize background colors as much as possible, but there’s still some considerable variation, particularly against the grid paper, which I believe has to do with the color of the subject influencing the background color influencing the white balance, etc., etc.. The black appeared to be much more “stable,” so to speak, though this could just be a result of changes being less noticeable against darker backgrounds. Unfortunately, it’s rare that any of the neutral swatches on the ColorChecker produce results acceptable to my eye, whether in the field or the studio, and so quite a bit of the “color calibration” that’s taking place is really a pretty subjective process. I’ve posted about some of these frustrations in photo forums online, with mixed response.

All this was performed on a Dell U2713HM regularly calibrated with an XRite ColorMunki, with AdobeRBG as the working color space in Lightroom, though all the files uploaded to MO are sRGB jpegs, as this is the default color space for the web, (not to mention it’s all this monitor is rated for).

I hope this answers your questions.

Was color-correction done in camera or on computer?
By: Martin Livezey (MLivezey)
2015-08-21 14:18:41 EDT (-0400)

Is the 2nd photo generated from the first (or vice-versa)? Is that your graph paper or was it generated by the software?

Created: 2014-09-24 09:16:16 EDT (-0400)
Last modified: 2015-08-21 12:37:13 EDT (-0400)
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