Camera and Display RGB question

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SUMMARY

The discussion centers on the effective resolution of a display when viewing colored objects versus white light. Specifically, a display with a resolution of 852 x 600 pixels, which utilizes RGB filtering, experiences a decrease in effective resolution when only red light is detected, as only the red pixels are activated. In contrast, when white light is present, all RGB pixels are activated, maintaining full resolution. The user expresses disappointment regarding the Meade DSI II camera's CCD resolution, highlighting the difference between advertised and effective resolution due to the filter grid design.

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  • Understanding of RGB color models and pixel filtering
  • Knowledge of CCD camera specifications and resolutions
  • Familiarity with display technology and effective resolution concepts
  • Basic principles of light and color detection in imaging systems
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  • Research the impact of filter grids on CCD camera performance
  • Learn about full-frame versus cropped sensor advantages in astrophotography
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  • Investigate the differences between various RGB pixel arrangements in displays
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Astronomy enthusiasts, astrophotographers, and anyone interested in the technical aspects of camera resolution and display technology will benefit from this discussion.

rp895
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Hello,

I have somewhat of a technical question and was hoping you would be able to help me. I have a display that is 852 (x3) x 600. This means that that there are 852 x 600 of the red, blue and green filtered pixels. Say however that I am looking at a completely red object, thus only red light falls on detector, and detected by only red filters. That means only red pixels on display will be on.
However, if in another case, white light falls and is detected by all three RGB pixels, and on the display as well, all three RGB pixels will be on. Does that mean that for a red object, resolution is effectively decreased by 3 compared to white light?

I appreciate any input you have!
 
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It would be if the camera software were capable of outputting 1704x1200 and the color were an even white and the filters had the same bandwidth...

I was very disappointed when I found out that my http://www.meade.com/dsi_ii/index.html" had a 510x492 ccd with a filter grid on it (as opposed to a 1010x984 ccd with a grid and an output of 510x492 in color). They advertise the ccd resolution, not the effective resolution. Incidentally, since the filter grid is 2x2, they double-up on the green. When I get home, I'll post an example image...

This is why better astrophotos are shot with full-size filters, a monochrome chip, and multiple exposures.
 
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