Luminous Landscape Forum

Raw & Post Processing, Printing => Digital Image Processing => Topic started by: marcmccalmont on December 29, 2007, 01:16:25 pm

Title: Interesting Histogram
Post by: marcmccalmont on December 29, 2007, 01:16:25 pm

I was suprised that a green rice pady would give me a histogram of the 3 primary colors so well seperated.
Marc

[attachment=4471:attachment][attachment=4472:attachment]

Title: Interesting Histogram
Post by: sesshin on December 29, 2007, 05:20:26 pm

interesting!

Title: Interesting Histogram
Post by: Bill Caulfeild-Browne on December 29, 2007, 05:32:38 pm

Quote

I was suprised that a green rice pady would give me a histogram of the 3 primary colors so well seperated.
Marc

[attachment=4471:attachment][attachment=4472:attachment]
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I opened your file in LR, and yes - your "green" paddy has a lot of red and blue in the "green". Very few colors are truly pure.
Bill

Title: Interesting Histogram
Post by: Jonathan Wienke on December 29, 2007, 07:42:09 pm

Quote

I was suprised that a green rice pady would give me a histogram of the 3 primary colors so well seperated.

The hue of your RGB primaries varies from color space to color space, so what is "pure green" ( R=B ) in one color space may have unequal R and B values in another. And as has already been mentioned, finding anything in nature where any two color channel values are equal is pretty tough. In pretty much every color space, foliage green is well to the yellow of "pure" green; the R value will be quite a bit higher than the B value.