This topic is in the 2015 archive. You can read it and like its posts here. It is read only.
Archive 2015No low pass filter
p.5 #1No low pass filter
Monito wrote:
Bayer has nothing to do with moiré or aliasing.
Aliasing (moiré is one example) is caused by sampling data
that includes (spatial) frequencies more than half as the
frequency of the sampler.
You get moiré from Foveons too.
The human retina has sensels (rods and cones) in a Poisson
distribution, not a regular array. As such it too gets aliasing,
but in a random way so that repetitive scenes (such as fabric)
are not weird looking.
Bayer has correctly nothing to do with moire or aliasing, but it has everything to do with false color around high frequency (monocrome) detail. False color occurs a lot of places in many photographs with Bayer sensors, even with AA filters, while moire is more rare (pun not intended).
kezeka wrote
AA filters make a lot of sense on bayer array sensors in order to prevent moire from rearing its ugly head. That said, with the huge increases in resolution, I would hope that canon is putting a lighter AA filter in the 5Ds than that currently found in the 5D3.Aliasing (moiré is one example) is caused by sampling data
that includes (spatial) frequencies more than half as the
frequency of the sampler.
You get moiré from Foveons too.
The human retina has sensels (rods and cones) in a Poisson
distribution, not a regular array. As such it too gets aliasing,
but in a random way so that repetitive scenes (such as fabric)
are not weird looking.
Bayer has correctly nothing to do with moire or aliasing, but it has everything to do with false color around high frequency (monocrome) detail. False color occurs a lot of places in many photographs with Bayer sensors, even with AA filters, while moire is more rare (pun not intended).
Feb 10, 2015 at 09:59 AM
p.5 #2No low pass filter
ben egbert wrote:
:-)
The main change I made to my starting point for sharpening is that rather than doing a USM layer in Photoshop, I now use the "clarity" slider in ACR. (Sometimes in LR, instead.)
DanAt some point I had the values 300,.3,0 usm and 12,50,1 for large radius high amount. I thought I got those from you.
But I started using a bit of sharpening in ACR, 50,0.6,7 mask 30. so I backed off the final settings to 70%. I also do the final usm in lab.
I used to use clarity, but stopped, how much do you use, or what range?
The amount:300, radius:.3 values come from an old recommendation from Canon. I still use that as a starting point sometimes for images that have a ton of very fine detail.
My starting point for sharpening for fine detail in most cases is a bit different than this, typically more like amount:150 and radius:.7 — though I vary from this starting point depending on the particular image.
Before I started using the clarity slider in ACR I used to also add a USM (unsharp mask) layer with amount:12 and radius 50. When I use the clarity slider instead, I probably usually set it in the 12-15 range, though I use some subjective judgment about that. For example, with some portraits I may use a negative clarity setting in order to get somewhat smoother skin, while with certain low contrast images (such as foggy landscapes) I might use a higher setting.
I also generally do a mild input sharpening operation in ACR — amount:12 and radius:1.0 — but with the mask fader turned up high enough to constrain this sharpening to clear edges only and to keep it away from smooth gradients and areas of solid color. The settings here can vary a bit depending on the ISO that I shoot at, since at higher ISOs I'm dealing with increased noise.
Dan
gdanmitchell wrote
ben egbert wrote
In fact I got my formula from GDan and now I see he has modified it from a couple years back. Thats ok, I did too.The main change I made to my starting point for sharpening is that rather than doing a USM layer in Photoshop, I now use the "clarity" slider in ACR. (Sometimes in LR, instead.)
Dan
But I started using a bit of sharpening in ACR, 50,0.6,7 mask 30. so I backed off the final settings to 70%. I also do the final usm in lab.
I used to use clarity, but stopped, how much do you use, or what range?
The amount:300, radius:.3 values come from an old recommendation from Canon. I still use that as a starting point sometimes for images that have a ton of very fine detail.
My starting point for sharpening for fine detail in most cases is a bit different than this, typically more like amount:150 and radius:.7 — though I vary from this starting point depending on the particular image.
Before I started using the clarity slider in ACR I used to also add a USM (unsharp mask) layer with amount:12 and radius 50. When I use the clarity slider instead, I probably usually set it in the 12-15 range, though I use some subjective judgment about that. For example, with some portraits I may use a negative clarity setting in order to get somewhat smoother skin, while with certain low contrast images (such as foggy landscapes) I might use a higher setting.
I also generally do a mild input sharpening operation in ACR — amount:12 and radius:1.0 — but with the mask fader turned up high enough to constrain this sharpening to clear edges only and to keep it away from smooth gradients and areas of solid color. The settings here can vary a bit depending on the ISO that I shoot at, since at higher ISOs I'm dealing with increased noise.
Dan
Feb 10, 2015 at 10:31 AM
p.5 #3No low pass filter
gdanmitchell wrote:
:-)
The main change I made to my starting point for sharpening is that rather than doing a USM layer in Photoshop, I now use the "clarity" slider in ACR. (Sometimes in LR, instead.)
DanAt some point I had the values 300,.3,0 usm and 12,50,1 for large radius high amount. I thought I got those from you.
But I started using a bit of sharpening in ACR, 50,0.6,7 mask 30. so I backed off the final settings to 70%. I also do the final usm in lab.
I used to use clarity, but stopped, how much do you use, or what range?The amount:300, radius:.3 values come from an old recommendation from Canon. I still use that as a starting point sometimes for images that have a ton of very fine detail.
My starting point for sharpening for fine detail in most cases is a bit different than this, typically more like amount:150 and radius:.7 — though I vary from this starting point depending on the particular image.
Before I started using the clarity slider in ACR I used to also add a USM (unsharp mask) layer with amount:12 and radius 50. When I use the clarity slider instead, I probably usually set...Show more →
Thanks for the clarification Dan. That USM 12,50,1 sounds right its exactly what I do. I know you tune your sharpening to the image, I tend to have less variability in my shots, so I am more formula like for sharpening. My overall amount of sharpening is probably not much different than yours. I may play with the clarity slider again.
ben egbert wrote
gdanmitchell wrote
ben egbert wrote
In fact I got my formula from GDan and now I see he has modified it from a couple years back. Thats ok, I did too.The main change I made to my starting point for sharpening is that rather than doing a USM layer in Photoshop, I now use the "clarity" slider in ACR. (Sometimes in LR, instead.)
Dan
But I started using a bit of sharpening in ACR, 50,0.6,7 mask 30. so I backed off the final settings to 70%. I also do the final usm in lab.
I used to use clarity, but stopped, how much do you use, or what range?
My starting point for sharpening for fine detail in most cases is a bit different than this, typically more like amount:150 and radius:.7 — though I vary from this starting point depending on the particular image.
Before I started using the clarity slider in ACR I used to also add a USM (unsharp mask) layer with amount:12 and radius 50. When I use the clarity slider instead, I probably usually set...Show more →
Thanks for the clarification Dan. That USM 12,50,1 sounds right its exactly what I do. I know you tune your sharpening to the image, I tend to have less variability in my shots, so I am more formula like for sharpening. My overall amount of sharpening is probably not much different than yours. I may play with the clarity slider again.
Feb 10, 2015 at 11:44 AM