Re: filmscanners: Grain Aliasing at 2700pppi
Does anyone have any idea why the list seems to periodically repeat posts? :-7 - Original Message - From: "Arthur Entlich" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Friday, April 06, 2001 10:42 AM
Re: filmscanners: Grain Aliasing at 2700pppi
What about the same thing - except using smart blur? I have had some good success with smart blur (which of course tries to preserve the edges). I generally have to use the low end of the settings, but it can be quite surprisingly nifty on some images if you take care with settings. Julian At 10:48 06/04/01, you wrote: I have been changing to LAB and splitting the channels, then applying either a Gaussian blur or Dust and Scratches, depending on the size of the grain, in the A and B channels only. Most of the sharpness remains in the L channel when you recombine. See Dan Margulis's chapter from Professional Photoshop at http://www.ledet.com/margulis/LABCorrection.pdf where he suggests this Maris - Original Message - From: "Lynn Allen" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 05, 2001 6:15 PM Subject: filmscanners: Grain Aliasing at 2700pppi | Grain aliasing and noise has been a regular topic on this list. It should | be--Mark, Rob, I and others have been talking at it hard enough. Without any | spectacular results, I could add. :-\ | | It's a pity that TIFFs can't be sent reasonably on the Net, because I just | ran up against one that makes the "Tiger" I wrote about into a "pussycat." | This new TIFF, done in Vuescan with 6 passes because Miraphoto couldn't | handle it, has grain aliasing in every square milimeter! True, it was | under-exposed in existing artificial light, hand-held at probably 1/15th or | 1/30th tops, with a Pentax 1.8 lens. So what? | | "There probably isn't enough 'picture there' to make a picture, there," you | might say. You've heard it before, said it before, and so have I, more than | once. But the thing is, there *is* quite a bit of picture there, and the | Scanwit "sees" it. Getting it *out of there* and making it presentable is | the difficult part. | | Most people I know would say, "Give it up, man." Well fine, but I don't | think my daughter will be graduating from highschool any time again soon. | It's been 22 years since her last go. :-) | | Every discussion we've had on this list about G-A begs the question "How to | deal with it?" We know (or do we?) what causes grain aliasing and/or noise, | what films to use in future, what scanners to buy in future, et cetera. But | how does one get those hundreds of blue-green pixels out of the dark areas | and the red-brown pixels out of the flesh-tones today, this afternoon? | | That's my question, and I'm stickin' to it. :-) | | Best regards--LRA | | PS--BTW, have you noticed that using a soft brush and Cloning smoothes out | those offending pixels? Not a lot of help unless one wants to "repaint" the | whole picture, but it might be a start. Or not. | | | --- | FREE! The World's Best Email Address @email.com | Reserve your name now at http://www.email.com | | | Julian Robinson in usually sunny, smog free Canberra, Australia
Re: filmscanners: Grain Aliasing at 2700pppi
Thanks, guys. I intend to spend the better part of a day (or two, if I have to) working on those two pictures (Tiger and Graduation). I've been putting this off for too long. :-) Best regards--LRA What about the same thing - except using smart blur? I have had some good success with smart blur (which of course tries to preserve the edges). I generally have to use the low end of the settings, but it can be quite surprisingly nifty on some images if you take care with settings. Julian At 10:48 06/04/01, Maris wrote: I have been changing to LAB and splitting the channels, then applying either a Gaussian blur or Dust and Scratches, depending on the size of the grain, in the A and B channels only. Most of the sharpness remains in the L channel when you recombine. See Dan Margulis's chapter from Professional Photoshop at http://www.ledet.com/margulis/LABCorrection.pdf where he suggests this Maris - Original Message - From: "Lynn Allen" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 05, 2001 6:15 PM Subject: filmscanners: Grain Aliasing at 2700pppi | Grain aliasing and noise has been a regular topic on this list. It should | be--Mark, Rob, I and others have been talking at it hard enough. Without any | spectacular results, I could add. :-\ | | It's a pity that TIFFs can't be sent reasonably on the Net, because I just | ran up against one that makes the "Tiger" I wrote about into a "pussycat." | This new TIFF, done in Vuescan with 6 passes because Miraphoto couldn't | handle it, has grain aliasing in every square milimeter! True, it was | under-exposed in existing artificial light, hand-held at probably 1/15th or | 1/30th tops, with a Pentax 1.8 lens. So what? | | "There probably isn't enough 'picture there' to make a picture, there," you | might say. You've heard it before, said it before, and so have I, more than | once. But the thing is, there *is* quite a bit of picture there, and the | Scanwit "sees" it. Getting it *out of there* and making it presentable is | the difficult part. | | Most people I know would say, "Give it up, man." Well fine, but I don't | think my daughter will be graduating from highschool any time again soon. | It's been 22 years since her last go. :-) | | Every discussion we've had on this list about G-A begs the question "How to | deal with it?" We know (or do we?) what causes grain aliasing and/or noise, | what films to use in future, what scanners to buy in future, et cetera. But | how does one get those hundreds of blue-green pixels out of the dark areas | and the red-brown pixels out of the flesh-tones today, this afternoon? | | That's my question, and I'm stickin' to it. :-) | | Best regards--LRA | | PS--BTW, have you noticed that using a soft brush and Cloning smoothes out | those offending pixels? Not a lot of help unless one wants to "repaint" the | whole picture, but it might be a start. Or not. | | | --- | FREE! The World's Best Email Address @email.com | Reserve your name now at http://www.email.com | | | Julian Robinson in usually sunny, smog free Canberra, Australia --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
Re: filmscanners: Grain Aliasing at 2700pppi
"There probably isn't enough 'picture there' to make a picture, there," you might say. You've heard it before, said it before, and so have I, more than once. But the thing is, there *is* quite a bit of picture there, and the Scanwit "sees" it. Getting it *out of there* and making it presentable is the difficult part. ... Every discussion we've had on this list about G-A begs the question "How to deal with it?" We know (or do we?) what causes grain aliasing and/or noise, what films to use in future, what scanners to buy in future, et cetera. But how does one get those hundreds of blue-green pixels out of the dark areas and the red-brown pixels out of the flesh-tones today, this afternoon? I get into this sometimes with theatre photos where a combination of tungsten stage lighting and very high contrast from brightest area to dark background almost guarantee underexposure in some dark areas like background and in shadows on faces, arms and legs. When these are background I select the background areas, sometimes clip off black end using levels then apply median filter. When in skin shadows I use a soft edge blur brush (which I found to be more successful than trying to select these areas and filter). Resamplng down helps when I have more pixels to work with than I'll need for output. -- Bob Shomler http://www.shomler.com/gallery.htm
Re: filmscanners: Grain Aliasing at 2700pppi
Bob wrote: I get into this sometimes with theatre photos where a combination of tungsten stage lighting and very high contrast from brightest area to dark background almost guarantee underexposure in some dark areas like background and in shadows on faces, arms and legs. When these are background I select the background areas, sometimes clip off black end using levels then apply median filter. When in skin shadows I use a soft edge blur brush (which I found to be more successful than trying to select these areas and filter). Resamplng down helps when I have more pixels to work with than I'll need for output. Good thought, Bob, and very valid. Unfortunately, the high-Kelvin theater lights weren't what I had to work with (I've actually been there). In this case, there wasn't much "clip" for black, and the sampling-down wasn't enough. But I *do* know what you're talking about, and thanks for bringing it to my attention. It's another tool in the box. :-) Best regards--LRA --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
filmscanners: Grain Aliasing at 2700pppi
Grain aliasing and noise has been a regular topic on this list. It should be--Mark, Rob, I and others have been talking at it hard enough. Without any spectacular results, I could add. :-\ It's a pity that TIFFs can't be sent reasonably on the Net, because I just ran up against one that makes the "Tiger" I wrote about into a "pussycat." This new TIFF, done in Vuescan with 6 passes because Miraphoto couldn't handle it, has grain aliasing in every square milimeter! True, it was under-exposed in existing artificial light, hand-held at probably 1/15th or 1/30th tops, with a Pentax 1.8 lens. So what? "There probably isn't enough 'picture there' to make a picture, there," you might say. You've heard it before, said it before, and so have I, more than once. But the thing is, there *is* quite a bit of picture there, and the Scanwit "sees" it. Getting it *out of there* and making it presentable is the difficult part. Most people I know would say, "Give it up, man." Well fine, but I don't think my daughter will be graduating from highschool any time again soon. It's been 22 years since her last go. :-) Every discussion we've had on this list about G-A begs the question "How to deal with it?" We know (or do we?) what causes grain aliasing and/or noise, what films to use in future, what scanners to buy in future, et cetera. But how does one get those hundreds of blue-green pixels out of the dark areas and the red-brown pixels out of the flesh-tones today, this afternoon? That's my question, and I'm stickin' to it. :-) Best regards--LRA PS--BTW, have you noticed that using a soft brush and Cloning smoothes out those offending pixels? Not a lot of help unless one wants to "repaint" the whole picture, but it might be a start. Or not. --- FREE! The World's Best Email Address @email.com Reserve your name now at http://www.email.com
Re: filmscanners: Grain Aliasing at 2700pppi
I have been changing to LAB and splitting the channels, then applying either a Gaussian blur or Dust and Scratches, depending on the size of the grain, in the A and B channels only. Most of the sharpness remains in the L channel when you recombine. See Dan Margulis's chapter from Professional Photoshop at http://www.ledet.com/margulis/LABCorrection.pdf where he suggests this Maris - Original Message - From: "Lynn Allen" [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, April 05, 2001 6:15 PM Subject: filmscanners: Grain Aliasing at 2700pppi | Grain aliasing and noise has been a regular topic on this list. It should | be--Mark, Rob, I and others have been talking at it hard enough. Without any | spectacular results, I could add. :-\ | | It's a pity that TIFFs can't be sent reasonably on the Net, because I just | ran up against one that makes the "Tiger" I wrote about into a "pussycat." | This new TIFF, done in Vuescan with 6 passes because Miraphoto couldn't | handle it, has grain aliasing in every square milimeter! True, it was | under-exposed in existing artificial light, hand-held at probably 1/15th or | 1/30th tops, with a Pentax 1.8 lens. So what? | | "There probably isn't enough 'picture there' to make a picture, there," you | might say. You've heard it before, said it before, and so have I, more than | once. But the thing is, there *is* quite a bit of picture there, and the | Scanwit "sees" it. Getting it *out of there* and making it presentable is | the difficult part. | | Most people I know would say, "Give it up, man." Well fine, but I don't | think my daughter will be graduating from highschool any time again soon. | It's been 22 years since her last go. :-) | | Every discussion we've had on this list about G-A begs the question "How to | deal with it?" We know (or do we?) what causes grain aliasing and/or noise, | what films to use in future, what scanners to buy in future, et cetera. But | how does one get those hundreds of blue-green pixels out of the dark areas | and the red-brown pixels out of the flesh-tones today, this afternoon? | | That's my question, and I'm stickin' to it. :-) | | Best regards--LRA | | PS--BTW, have you noticed that using a soft brush and Cloning smoothes out | those offending pixels? Not a lot of help unless one wants to "repaint" the | whole picture, but it might be a start. Or not. | | | --- | FREE! The World's Best Email Address @email.com | Reserve your name now at http://www.email.com | | |
