I will check when I will have the camera
I doubt it will be very visible, but resolution tests may show the nature of the filtering. I think they analyze a small cluster surrounding each pixel and if the value of the pixel in question is an outlier, it is assigned the minimum or maximum cluster value.
Right you are, as usual.I will check when I will have the camera
I do not find this evidence conclusive. Such an algorithm makes sense, and this is more or less what LR is doing probably (well, with different parameters but LR kills hot pixels very well, not sure about stars).Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
On that specific point, I would opine that the slanted-edge method would not be ideal for testing the impact of the star-eating algorithm on resolution.I will check when I will have the camera
That's another problem with sensors without AA filters; it is impossible to tell if a bright pixel is a point of light or noise, because they may record as the same thing if the point of light falls almost completely inside of a pixel. With an AA filter, a point of light creates a multi-pixel structure, as long as it is not from a narrow-band light source that only registers well in the red or blue RAW channel with a CFA.
However, it is the outliers that you want to preserve. Not only faint stars but fine textures on petals etc.On that specific point, I would opine that the slanted-edge method would not be ideal for testing the impact of the star-eating algorithm on resolution.I will check when I will have the camera
Given my understanding of the star-eating algorithm, I would expect it to only have a significant impact on the value of a pixel if it differs significantly from its neighbours, meaning that its impact on non-outliers will be comparatively small.
Most SE implementations go to some lengths to reduce the impact of outliers on the SFR measurement, meaning that they would be fairly insensitive to the effect of the star-eater if the number of outliers is indeed small.
But nothing beats testing this idea, just to make sure. Gah --- now I have tempted myself
-F
Jim provided the evidence in his post.I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Jim already addressed this to my satisfaction - "It is certainly possible that it is just a coincidence that the proposed “star-eater” algorithm produces the same spectra as whatever Sony is doing in-camera, but I don’t think so. This is probably the real deal, or close enough not to matter."
I should note that the person who proposed the algorithm did not pick an algorithm that matched my test results. They proposed the algorithm independently, I tested it, and the results matched.Jim provided the evidence in his post.I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Jim already addressed this to my satisfaction - "It is certainly possible that it is just a coincidence that the proposed “star-eater” algorithm produces the same spectra as whatever Sony is doing in-camera, but I don’t think so. This is probably the real deal, or close enough not to matter."
Except that you cannot do this on a Bayer sensor (without getting absurd results).Jim provided the evidence in his post.I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Jim already addressed this to my satisfaction - "It is certainly possible that it is just a coincidence that the proposed “star-eater” algorithm produces the same spectra as whatever Sony is doing in-camera, but I don’t think so. This is probably the real deal, or close enough not to matter."
I guess that this passes for a proof in certain circles.Jim provided the evidence in his post.I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Jim already addressed this to my satisfaction - "It is certainly possible that it is just a coincidence that the proposed “star-eater” algorithm produces the same spectra as whatever Sony is doing in-camera, but I don’t think so. This is probably the real deal, or close enough not to matter."
You [or anyone] could try to falsify what is proposed hereI guess that this passes for a proof in certain circles.Jim provided the evidence in his post.I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Jim already addressed this to my satisfaction - "It is certainly possible that it is just a coincidence that the proposed “star-eater” algorithm produces the same spectra as whatever Sony is doing in-camera, but I don’t think so. This is probably the real deal, or close enough not to matter."
???You [or anyone] could try to falsify what is proposed hereI guess that this passes for a proof in certain circles.Jim provided the evidence in his post.I have not seen evidence that this algorithm produces the same result. Besides, averaging over neighboring pixels for a Bayer sensor is a bit problematic.Feel free to propose a specific algorithm that produces the same result. Extra points if it is good at hot pixel suppression and similar to other hot pixel suppression algorithms that other manufacturers have used, like the algorithm in the post.An algorithm which would provide the same power spectrum? A certain convolution filter would do it.You are welcome to propose your own algorithm.I do not find this evidence conclusive.Right you are, as usual.I will check when I will have the camera
Details of the probable algorithm here:
http://blog.kasson.com/the-last-wor...e-sony-a7rii-long-exposure-spatial-filtering/
Jim already addressed this to my satisfaction - "It is certainly possible that it is just a coincidence that the proposed “star-eater” algorithm produces the same spectra as whatever Sony is doing in-camera, but I don’t think so. This is probably the real deal, or close enough not to matter."
