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Let's Talk About...sharpening

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SsuperDdave's Avatar
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 Posted 04/22/2015  11:56 am  Show Profile   Bookmark this reply Add SsuperDdave to your friends list Get a Link to this Reply
Anything on Cambridge Colour's website is mandatory reading.
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Dar's Avatar
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 Posted 04/22/2015  1:55 pm  Show Profile   Bookmark this reply Add Dar to your friends list Get a Link to this Reply
Thanks for the link.

I just signed up at the Cambridge in Colour's web site.
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SsuperDdave's Avatar
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 Posted 04/23/2015  9:24 pm  Show Profile   Bookmark this reply Add SsuperDdave to your friends list Get a Link to this Reply
For how my personal brain works, Cambridge Colour is the most accessible photography learning source there is.
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 Posted 04/23/2015  10:27 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
I really like their take on Diffraction Limited Aperture. I refer to that concept a lot. In fact for coin photography, the DLA is THE optimum aperture. Any larger aperture gives less depth of field. Any smaller aperture gives less sharpness.

This is one area the choice between a TXi and XS makes a difference, and is part of the reason we recommend the XS. Remember, the TXi series have 18MP, while the XS has 10MP, in the same physical sensor size. This means the pixels are larger on the XS, and further means that the DLA of the XS is smaller than the TXi. In The Digital Picture website review of the T2i (http://www.the-digital-picture.com/...Review.aspx) you'll find a table of Canon models and their sensor specs, including DLA. The DLA for TXi are f/6.8, while for the XS is f/9.1. This means you can stop-down the XS by a full stop compared with the TXi, giving better DOF at the same sharpness.
Contact me for photographic equipment or visit my home page at:
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Edited by rmpsrpms
04/23/2015 11:15 pm
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xshift's Avatar
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 Posted 04/24/2015  07:10 am  Show Profile   Bookmark this reply Add xshift to your friends list Get a Link to this Reply
Dave's workflow is pretty much mine pixel for pixel. "Save As" has filled multiple drives with various incarnations of my photos; I learned early to create multiple backup saves as I worked on images.

pepactonius:

Quote:
Note: I'm going to have to get more familiar with GIMP in the next couple of years, since I probably can't port the existing Photoshop license to a new computer.

If it's an older Photoshop (one of the "normal" installed programs, not the current subscription model) you should be able to de-register on the current computer and install on another with the same license key. Check under the Help menu in-program - there should be a Deactivate or Unregister option. If it doesn't, uninstalling it should be enough to satisfy the license requirements. If you need the serial number you can install one of the many programs that will list your computer's software serial numbers.. I've used Belarc for years http://www.belarc.com/free_download.html

This assumes it's not installed on a work computer or something that would have to be left behind. They also included the ability to install on 2 machines with many of their licenses.

For the current subscription model, I don't know how those operate but you should be able to install it wherever.

Dar:

Quote:
Sounds like a full time Job.

Not quite as bad as having to get a college degree There is always a point where you can run with what you've learned so far.

This topic is fascinating. I'm not always able to keep up with all the posts in the photography section, but when I *am* able to come in here I always come away having learned something (usually many somethings) new.
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pepactonius's Avatar
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 Posted 04/24/2015  10:15 am  Show Profile   Bookmark this reply Add pepactonius to your friends list Get a Link to this Reply
@xshift:

Thanks for the info -- I have Photoshop CS5, with CDs and the serial number, etc. I'm wondering if there will be any support at all (license switch) from Adobe for CS5 in a few years, when it's time to upgrade my current PC. Also, will CS5 work on Windows 10, 11, 12, etc? Will typical machines even have CD drives a few years from now? Will future motherboards or Windows even support CD drives? Will PCs of the future allow installation of local applications, or will they be cloud-only? Will Windows and Intel CPUs go away entirely, leaving only ARM-type mobile devices with IOS or Android?

I imagine I'll probably have to give up on Photoshop someday, since it's no longer being updated.
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xshift's Avatar
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 Posted 04/24/2015  11:22 am  Show Profile   Bookmark this reply Add xshift to your friends list Get a Link to this Reply
Heh.. that's the one I have, as well. I had to switch it from a hard drive that was failing to a new one, and the de-registering and re-registering was pretty painless.

It *should* work with 10. It works with 7, and I haven't heard of major issues yet with software not working on 10 that worked on 7. (I haven't really been keeping up with that, though, so I could be 100% wrong). It will more than likely be viable for at least another couple of years, and we don't have to upgrade the OS just because Microsoft says so. "Compatibility mode" works in a lot of cases, as well, for older programs.

Personally, I think there are too many people without reliable internet connections for cloud-only computers like the Chromebook to take over anytime soon.. so CD/DVD drives should still be around for a while I doubt there will be a license switch, as Adobe likes their money too much.
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 Posted 04/26/2015  01:05 am  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
Going back to my original question, is there a technique that can improve 100% crops of any jpg image to the point we see with the D810? Or does the technique require knowledge of the demosaicing algorithm to get the most from the raw data?
Contact me for photographic equipment or visit my home page at:
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SsuperDdave's Avatar
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 Posted 04/26/2015  08:28 am  Show Profile   Bookmark this reply Add SsuperDdave to your friends list Get a Link to this Reply

Quote:
Or does the technique require knowledge of the demosaicing algorithm to get the most from the raw data?


This is so far above my head I can't see it with magnification from here, but this seems the intuitive answer. Do we know anyone in the process of hacking Nikon's SDK? I know from CHDK that it was accomplished a couple of years back but I don't know where they are or what they've managed to free up.
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 Posted 04/26/2015  09:14 am  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
We know of folks who use the SDK (folks like Helicon, ControlMyNikon, etc) but I can't point to any hackers making more use of it than integrating into their flows. Quite a few camera releases from Nikon came without SDKs, so these folks could not make those work with their software. There must be a separate release of RAW decoder (separate from camera control) so that the Adobes of the world can work with the RAW files, but I have not paid much attention since using Canon. I didn't even know that so many Nikon releases were hamstrung by lack of SDK until the question of tethering came up on the D3100.
Contact me for photographic equipment or visit my home page at:
http://macrocoins.com
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John1's Avatar
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 Posted 04/26/2015  09:26 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Just a heads up. Went to download GIMP and my security blocked a trojan file and gimp also installed an unwanted computer cleaning programs. Needles to say I uninstalled GIMP and the rest of the stuff that came with it. Free GIMP isn't so free is it ? Now I have highlighted words all over the place for ads I can't get rid of
John
Edited by John1
04/26/2015 10:00 am
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SsuperDdave's Avatar
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 Posted 04/26/2015  12:18 pm  Show Profile   Bookmark this reply Add SsuperDdave to your friends list Get a Link to this Reply
With all due respect, John, you probably made specific choices in the installation process to allow that. Even if that choice was (it usually is) to be as little involved in the install process as possible. Gimp is free, but hosting it to give you isn't. And the people willing to pay enough to make that hosting possible are the ones who want you to use their search engine (or whatever service that shoves you into the directed advertising which they're making their money from).

Important point for EVERYONE reading: Always use the "Custom Install" choice for every software you install. If you make zero new choices during it, you get the same install as if you'd just done the one-click thing. It's the only way to see and stop the add-ons that everyone on the Internet uses to pay for "free" software.

The Internet is not a nice neighborhood. Never believe it is.
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John1's Avatar
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 Posted 04/26/2015  12:38 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Not familiar with "custom install" but I did go to the GIMP web site and clicked down load.
John1
Edited by John1
04/26/2015 1:16 pm
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 Posted 06/30/2015  6:44 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
just had to pull this thread back up to the top. as I realize I have to get into resizing and photo editing. thank you all so much. there is a lot here I don't understand . but I believe I understand the process. so to improve my images. I have to start photo editing great read for any new shooters.
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 Posted 06/30/2015  7:19 pm  Show Profile   Bookmark this reply Add rmpsrpms to your friends list Get a Link to this Reply
I was thinking about this thread the other day when I was contemplating renting a D810 to see for myself if indeed the camera is as capable as it appears. A semi-local shop will rent for $148/week, plus $39 damage waiver, and $15 courier fee to a very local shop, total $202 for a week to check it out. It's fairly expensive, and adds to the cost of the camera if I decide to buy, but if it falls short of expectations might be worth it.
Contact me for photographic equipment or visit my home page at:
http://macrocoins.com
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