AhamB wrote:
I guess the color shift is asymmetric because the angle of incidence onto the RGBG quadruplets of the Bayer array is different in each quadrant of the sensor. Some of the subpixels will be attenuated more and some will be excited more due to the light leakage caused by the obliquely incident light. The RGBG subpixel arrangement is the same all over the sensor, but depending on the direction the light is coming from, the light leakage must affect different subpixels. Makes sense?
The quadruplets are in series GRGBGRGBGRGBGRGBGRGBGRGB
So light hitting from the left side has the following possible transitions if it contaminates the neighboring pixel
AhamB wrote:
I guess the color shift is asymmetric because the angle of incidence onto the RGBG quadruplets of the Bayer array is different in each quadrant of the sensor. Some of the subpixels will be attenuated more and some will be excited more due to the light leakage caused by the obliquely incident light. The RGBG subpixel arrangement is the same all over the sensor, but depending on the direction the light is coming from, the light leakage must affect different subpixels. Makes sense?
The quadruplets are in series GRGBGRGBGRGBGRGBGRGBGRGB
So light hitting from the left side has the following possible transitions if it contaminates the neighboring pixel
R->G
G->B
B->G
and from the right side
R->G
G->R
B->G
Hence in one case you have a G->R transition and in the other a G->B transition which indeed could account for the asymmetry. It\'s because G is sampled twice.
AhamB wrote:
I guess the color shift is asymmetric because the angle of incidence onto the RGBG quadruplets of the Bayer array is different in each quadrant of the sensor. Some of the subpixels will be attenuated more and some will be excited more due to the light leakage caused by the obliquely incident light. The RGBG subpixel arrangement is the same all over the sensor, but depending on the direction the light is coming from, the light leakage must affect different subpixels. Makes sense?
The quadruplets are in series GRGBGRGBGRGBGRGBGRGBGRGB
So light hitting from the left side has the following possible transitions if it contaminates the neighboring pixel
R->G
G->B
B->G
and from the right side
R->G
G->R
B->G
Hence in one case you have a G->R transition and in the other a G->B transition which indeed could account for the asymmetry. It\'s because G is sampled twice.
Yes, that could be the answer.
Jul 28, 2011 at 11:09 AM
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