all digital camera specs except for the Foveon based ones count individual sensing elements as a pixel. it carries almost all of the same detail information as if they were pure luminance sensors. the eye is pretty insensitive to color detail and there are many, many experiments that verify this. the luminance channel is where perceived detail comes from. interpolating color with hints from luminance works almost as well as having the same number of pixels sensitive to RGB like the Foveon. i don't know if you have noticed, but they have changed the Sigma/Foveon ads to say 10.2 million sensors.
Herb.... ----- Original Message ----- From: "T Rittenhouse" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 05, 2003 13:07 Subject: Re: Bayer image example > Very interesting... > > Now, when they say a digicam is 6 megapixel, do they mean 6 million > blue-green-green-red pixels (24 million sensor pixels), or do they mean 1.5 > million blue-green-green-red pixels (6 million sensor pixels)? > > Now, on the Foveon, when they say 3 megapixels, do they mean 3 million, > equivalent, blue-green-red pixels, or 1 million, equivalent, blue-green-red > pixels? And, what about the reduced green sensitivity of the Foveon sensor > compared to a Bayer sensor?