Timeline for What does an unprocessed RAW file look like?
Current License: CC BY-SA 4.0
11 events
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| Jul 1, 2021 at 3:11 | comment | added | Michael C | Similarly, though the exact colors can vary from camera to camera, the "blue" and "green" filters are more of a violet shade of blue (455nm rather than 480nm) and a slightly yellow shade of green (540nm rather than 525nm). The "red" filters tend to be an orangish-yellow with peak transmissivity around 590-600nm, rather than actual red at around 640nm. It's covered in great detail in this answer | |
| Jul 1, 2021 at 2:45 | comment | added | Michael C | Neither the cones in human retinas nor the colored filters in Bayer masked cameras are actually most sensitive/transmissive to "red", "green", and "blue". The long wavelength, medium wavelength, and short wavelength cones were labeled R, G, and B decades before we could accurately measure the peak sensitivity of the three types of retinal cones. There's very little difference between the 'green with a touch of yellow' that our M cones have peak response to and the yellow 'with a touch of green' to which our L cones are most responsive. It's the difference that our brains use to create colors. | |
| Jul 1, 2021 at 1:09 | comment | added | Michael C | Human cones are also "monochromatic" in that they just send an intensity value to the brain. The brain creates the perception of color which does not exist in wavelengths of light or any other portion of the electromagnetic spectrum. Other species do not see colors for the same wavelengths we perceive as colors, and we do not perceive some wavelengths that other animals perceive as color. Color is not an intrinsic property of the portion of the EM spectrum we call "light", it is a property of the perception of portions of the EM spectrum by humans or other creatures. | |
| Jul 7, 2020 at 11:25 | comment | added | mongo | Photoresponsivity of both CCD and CMOS sensors is not linear across the spectra. In modern CCD and CMOS sensors this is frequently corrected using a lookup table (LUT) within the sensor electronics, to normalize for variations in sensor quantum efficiency both in terms of spectral bias, and in terms of linearity. Additionally, color masks play a role, and may be adjusted to compensate for spectral quantum efficiency variability. In higher end sensors, a combination of color masking dye selection and LUTs are utilized to obtain optimized results. | |
| Jul 7, 2020 at 9:54 | history | edited | Michael C | CC BY-SA 4.0 |
Corrected the oft repeated but incorrect and simplistic idea of "only" red, "only" green, and "only blue filters.
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| Dec 23, 2019 at 15:53 | history | rollback | cranbanan |
Rollback to Revision 3
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| Mar 4, 2019 at 20:30 | history | edited | Michael C | CC BY-SA 4.0 |
added 110 characters in body
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| Feb 22, 2019 at 13:51 | history | edited | cranbanan | CC BY-SA 4.0 |
edited body
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| Feb 21, 2019 at 21:25 | history | edited | cranbanan | CC BY-SA 4.0 |
added 3096 characters in body
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| Feb 21, 2019 at 18:20 | review | First posts | |||
| Feb 21, 2019 at 21:25 | |||||
| Feb 21, 2019 at 18:19 | history | answered | cranbanan | CC BY-SA 4.0 |