In Photoline if you use the "Linear" interpolation algorithm, you'll get close to what it might look like. I find it interesting to play with that at times.The author of Photoline also mentioned (long ago) the possibility implementing a high-resolution B&W mode where the raw value of each photosite is used as a gray-value. I believe I read something somewhere on their forums a long time ago about some open-source project online somewhere doing just that. Getting the equivalent of a 20 megapixel B&W image from a 5 megapixel sensor. Though there is a problem with trying this. Any purer colors get displayed as a very fine checker-board pattern instead of smooth gray values. It was suggested that a color look-up table could be used to even out those checker-boards into smooth gray areas.Do a hunt for that open-source high-resolution B&W images from RAW data project, I believe the author of Photoline said they had viewers to see the RAW data in their true Bayer patterns.
How can you get a 20Mpixel from a 5Mpixel sensor?The 5Mpixels represent all the photosites, where 1/4th are red, 1/4th are blue, and 1/2th are green.So when you convert all this data to a fully rgb pixels, you get -approx- 40bit fully colored RGB (5/4)Mpixels. (Jpeg reduce the color depth to 24bit along with "inflating" back to original resolution)So in B/W you "give up" the color information, and just use the grayscale 0-1023 values for each pixel. Therefore you stay with 5Mpixels, unless you reduce the bit depth to extrapolate more resolution pixels.Ain't that correct?
Quote from: thunderstorm on 13 / April / 2008, 09:01:16How can you get a 20Mpixel from a 5Mpixel sensor?The 5Mpixels represent all the photosites, where 1/4th are red, 1/4th are blue, and 1/2th are green.So when you convert all this data to a fully rgb pixels, you get -approx- 40bit fully colored RGB (5/4)Mpixels. (Jpeg reduce the color depth to 24bit along with "inflating" back to original resolution)So in B/W you "give up" the color information, and just use the grayscale 0-1023 values for each pixel. Therefore you stay with 5Mpixels, unless you reduce the bit depth to extrapolate more resolution pixels.Ain't that correct?I'm not an expert so I may be wrong, but I think the idea is that in the sensor the physical pixels that are sensitive to each color may be located next to each other and not on top of each other. If so, there will be more resolution available for greyscale (but also geometrical problems if the layout isn't uniform, and the different colors obviously need proper weighting).
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