[Leica] B&W on a digital camera

[kanner at acm.org (Herbert Kanner)]

I think your second hypothesis describes what happens. I base this on 
Mat Colson's book on Lightroom 3 where he points out that, for 
example, increasing brightness on green, when processing a B&W 
rendition, will lighten the portion of the B&W image that is grass.

Herb



>Technical question:
>When a B&W picture is made with a digital camera incorporating a
>Bayer filter, are all the pixels on the sensor used to form the
>image? Or, as in TV, is the B&W image derived from the green pixels?
>Secondly, if a color image is converted to B&W in Photoshop or a
>similar program, does the program simply desaturate all the colors,
>transform the colored pixel intensity to a greyscale equivalent, or
>use an algorithm to compose the image?
>I was asked this question at a photography show and I didn't have an
>answer. Perhaps a Lugger knows.
>Larry Z
>
>
>
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-- 
Herbert Kanner
kanner at acm.org
650-326-8204

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