#1
|
|||
|
|||
WCMY CCDs
How come RGB CCDs are more common than WCMY CCDs? Looking over their
descriptions on the web, I would have thought WCMY CCDs would have made RGB obsolete, not only for astronomy, but for consumer digital cameras too. Resolution ought to be the same for both. WCMY gathers more light. With four types of sensors, WCMY ought to give better color balance too (after appropriate transformations). |
#3
|
|||
|
|||
On 11 Oct 2005 12:07:05 -0700, wrote:
How come RGB CCDs are more common than WCMY CCDs? Looking over their descriptions on the web, I would have thought WCMY CCDs would have made RGB obsolete, not only for astronomy, but for consumer digital cameras too. Resolution ought to be the same for both. WCMY gathers more light. With four types of sensors, WCMY ought to give better color balance too (after appropriate transformations). Color CCDs produce bad enough images when they use RGB Bayer filters. They are even worse with CMY. Have a read: http://www.sbig.com/sbwhtmls/cmynot.htm _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
#4
|
|||
|
|||
Color CCDs produce bad enough images when they use RGB Bayer filters.
They are even worse with CMY. Have a read: http://www.sbig.com/sbwhtmls/cmynot.htm A very good link, thank! The first point (due to the required transformations you get a worse signal-noise ratio per RGB pixel) looks correct, and gets even worse for WCMY or CMYY. The second (CMY, especially M, is blurred because R, G, B refract differently) also looks correct and very bad. The third (M=B+1.1R implies RGB colors are off) could be corrected by testing the camera plus some linear algebra. RGB could have the same problem (R might really be .9R), and could be fixed the same way. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
How times change; CCDs basically dead, CMOS is king | RichA | Amateur Astronomy | 18 | June 8th 05 07:48 AM |
CCDs | Richard | UK Astronomy | 1 | February 10th 04 06:51 PM |
Time Delay Integration (TDI) with CCDs | George Normandin | CCD Imaging | 0 | January 9th 04 02:58 AM |
astronomical CCD's | Stuart Turrell | UK Astronomy | 0 | November 25th 03 12:59 AM |
Attaching CCD's to Eyepieces - Newbie question. | Rob Pollard | CCD Imaging | 1 | August 1st 03 12:01 PM |