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#11
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the officialannouncement will be their on D P Reviews
"Bart van der Wolf" writes:
"George Preddy" wrote in message om... SNIP The precise spectral response of the 10M is published all over the web, same for the 5M. http://www.hanvision.com/contents/pr...0_2004_HVC.pdf Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue, 63%green, and 45% red. Not really. Those are "normalized" curves. I suspect they mean that each has been scaled to make the integral under the curve 1. It would be shocking if the blue channel had a higher peak response than red. That means the color is VERY desaturated and massive postprocessing is needed to get a usable color (but with lots of noise). "Massive"? "Lots"? Let's say "more noise in saturated colors". The above implementation is also only 30-bits digital color output! Yup. Read the fine print. "30-bit RGB output interfaces to parallel LVDS framegrabbers supporting four 8-bit input channels." Apparently they were working to an interface that was only capable of 32 bits. That doesn't tell the limit of the sensor. The Foveon sensor has advantages and disadvantages, as with most technology. My impression is that the sensor in this camera (and the Sigmas) is competitive with 6MP color-filter-array sensors. -- -Stephen H. Westin Any information or opinions in this message are mine: they do not represent the position of Cornell University or any of its sponsors. |
#12
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
"Bart van der Wolf" wrote in message ...
"George Preddy" wrote in message om... SNIP The precise spectral response of the 10M is published all over the web, same for the 5M. http://www.hanvision.com/contents/pr...0_2004_HVC.pdf Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue, 63%green, and 45% red. The ideal spectral response curves overlay the Foveon curves almost precisely (which is intentional of course), that is why Foveon is the only option for scientitfically perfect work. Colors are quantum accurate, all Bayer colors are guessed--100% of the output pixles are totally wrong, thus all Bayer images are of exactly zero scientific value. |
#13
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
"George Preddy" wrote in message om... "Bart van der Wolf" wrote in message ... "George Preddy" wrote in message om... SNIP The precise spectral response of the 10M is published all over the web, same for the 5M. http://www.hanvision.com/contents/pr...0_2004_HVC.pdf Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue, 63%green, and 45% red. The ideal spectral response curves overlay the Foveon curves almost precisely (which is intentional of course), that is why Foveon is the only option for scientitfically perfect work. Colors are quantum accurate, all Bayer colors are guessed--100% of the output pixles are totally wrong, thus all Bayer images are of exactly zero scientific value. They can't be totally wrong and I can prove it. Just take a picture and make them more wrong, which wouldn't be possible if they were totally wrong. Then the picture will become unrecognizable. |
#14
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
In message ,
Randall Ainsworth wrote: In article , George Preddy wrote: That is exactly why the Foveon Pro 10M used in the SIgma SD9 and SD10 are also used for exacting scientific applications like the above, while Bayers never are as the data they present is 75% made up during interpolatative color processing. That's right, every pixel color in every Bayer image is 75% guessed, while 100% of every pixel color in a Foveon image was measured with perfect quantum accuracy precisely as presented, much like the time keeping accuracy of an atomic clock--absolutely perfect, all the time. How do you keep a straight face with this bull****? He actually believes it. SteveGeorge believes that if you arrange words in a certain way, you can conjure up any reality you want. -- John P Sheehy |
#15
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
"FLY135" fly_135(@ hot not not)notmail.com wrote in message hlink.net...
"George Preddy" wrote in message om... "Bart van der Wolf" wrote in message ... "George Preddy" wrote in message om... SNIP The precise spectral response of the 10M is published all over the web, same for the 5M. http://www.hanvision.com/contents/pr...0_2004_HVC.pdf Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue, 63%green, and 45% red. The ideal spectral response curves overlay the Foveon curves almost precisely (which is intentional of course), that is why Foveon is the only option for scientitfically perfect work. Colors are quantum accurate, all Bayer colors are guessed--100% of the output pixles are totally wrong, thus all Bayer images are of exactly zero scientific value. They can't be totally wrong and I can prove it. Just take a picture and make them more wrong, which wouldn't be possible if they were totally wrong. Then the picture will become unrecognizable. 75% guessed pixels using values that are interpolated smack dab between their two neighbors isn't unrecognizable, it is just horribly low optical resolution. You don't understand any of this. |
#16
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
In rec.photo.equipment.35mm George Preddy wrote:
75% guessed pixels using values that are interpolated smack dab between their two neighbors isn't unrecognizable, it is just horribly low optical resolution. You don't understand any of this. No its you who don't understand how bayer sensors work and more importantly, why they work. Which causes you talk lots of bull****. -- Sander +++ Out of cheese error +++ |
#17
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
"George Preddy" wrote in message om... "Bart van der Wolf" wrote in message ... "George Preddy" wrote in message om... SNIP The precise spectral response of the 10M is published all over the web, same for the 5M. http://www.hanvision.com/contents/pr...0_2004_HVC.pdf Which indicates that e.g. green (550 nm wavelength) is seen as 49% blue, 63%green, and 45% red. The ideal spectral response curves overlay the Foveon curves almost precisely (which is intentional of course), that is why Foveon is the only option for scientitfically perfect work. Colors are quantum accurate, all Bayer colors are guessed--100% of the output pixles are totally wrong, thus all Bayer images are of exactly zero scientific value. Hmmmm. Tell that to the astronomers. |
#18
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
"someone" wrote in message ...
"George Preddy" wrote in message om... The ideal spectral response curves overlay the Foveon curves almost precisely (which is intentional of course), that is why Foveon is the only option for scientitfically perfect work. Colors are quantum accurate, all Bayer colors are guessed--100% of the output pixles are totally wrong, thus all Bayer images are of exactly zero scientific value. Hmmmm. Tell that to the astronomers. "The astronomers" always use the Sigma/Foveon method of capturing full RGB at every pixel location, usually by taking one red exposure, then one green, then one blue for full-capture RGB at every pixel location. Nothing else will do for color-accurate work. Foveon is the only color-accurate option in the DSLR format, subtle hues are pure perfection due to Foveon's quantum mechanical color precision--no glued-on interpolated plastic filters here... http://www.pbase.com/imageprocessing/foveon_color_moon |
#19
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SIGMA VIDEO CAMERA W/ FOVEON X75v....Tomorrow the official announcement will be their on D P Reviews
In article , George
Preddy wrote: Foveon is the only color-accurate option in the DSLR format, subtle hues are pure perfection due to Foveon's quantum mechanical color precision--no glued-on interpolated plastic filters here... Hey George...glue this on... |
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