Sponsor Message:
Aviation Photography Forum
My Starred Topics | Profile | New Topic | Forum Index | Help | Search 
Vuescan: Setting Black & White Points  
User currently offlineFUAirliner From Germany, joined Jul 2001, 538 posts, RR: 3
Posted (12 years 3 weeks 5 days ago) and read 4415 times:

Hi everybody,

I decided to give VueScan a try as the results I get with the software that came with my Scan Dual II do not satisfy me any more.

I understood most of VueScan's settings, but how do I adjust the gamma and how do I set the black & white points correctly?

Additionally, if anybody has special hints about VueScan, can you please reveal them?

Thank you!


Frank


Frank Unterspann - Hamburg, Germany
5 replies: All unread, jump to last
 
User currently offlineCkw From UK - England, joined Aug 2010, 713 posts, RR: 16
Reply 1, posted (12 years 3 weeks 4 days 18 hours ago) and read 4354 times:

Frank - The thing to understand is that white and black points determine the part of the image which will be set to black or white (not too surprising really!) BUT if you are scanning a neg, there may be scratches which will allow "pure" light to pass through which will then be set as a "false" white point. To avoid this, you can increase the white point setting to ignore, say the brightest .5% of the image.

Other settings amy be required in images (particularly low contrast) which do not contain any true whites or blacks. The value may vary for each image - experiment.

Gamma has, in recent version of Vuescan, been labelled "brightness" - this does appear to still be a gamma correction rather than a global brightness control.

Cheers,

Colin



Colin K. Work, Pixstel
User currently offlineSkymonster From , joined Dec 1969, posts, RR:
Reply 2, posted (12 years 3 weeks 4 days 17 hours ago) and read 4347 times:

Frank,

The only things I can add to what Colin has already said is that you should make sure that you set VueScan to the film type you are using, especially if you are using slides. These settings appear on both the "Device" and "Color" tabs - at least they do if you're using Kodachrome 64! I've found that getting the film type right saves a lot of the chores of mucking about with gamma, brightness and color balance manually.

Aside from that, I'd recommend "white balance" as a starting point for Color balance on the "Color" tab, and I also tend to set VueScan's grain reduction to Medium and check the Sharpen box, both on the "Filter" tab - but of course, that's just my liking!

Andy


User currently offlineFUAirliner From Germany, joined Jul 2001, 538 posts, RR: 3
Reply 3, posted (12 years 3 weeks 3 days 21 hours ago) and read 4325 times:

Thank you, Andy and Colin!

I also checked your previous posts about VueScan which gave me additional hints and ideas.


Frank



Frank Unterspann - Hamburg, Germany
User currently offlineSunilgupta From United States of America, joined Nov 2000, 775 posts, RR: 14
Reply 4, posted (12 years 3 weeks 3 days 15 hours ago) and read 4322 times:

Frank,

I just started using VueScan as well and it produces excellent results from most slides without messing with curves or changing any of the default seettings. However, I have found that for some slides I still need to fall back to the Minolta software where I have complete control of the curves. VueScan seems to take a more “canned” approach to image correction and therefore offers you less control… maybe I just don’t know how to use it yet.

Regarding the film type settings… I left them as the defaults and got great results with Kodachrome. When I scanned Kodachrome with the Kodachrome settings of VueScan the results were terrible! What did I do wrong?

Sunil


User currently offlineCkw From UK - England, joined Aug 2010, 713 posts, RR: 16
Reply 5, posted (12 years 3 weeks 3 days 7 hours ago) and read 4311 times:

It's important to remeber that Vuescan is designed to capture the best possible data from the slide - it does not have photoediting features like Nikonscan/Minolta scanning software etc. It is assumed you will be using Vuescan as a first step followed by work in Corel, Photoshop etc.

Personally I agree with this since, with Nikonscan at least, the photoediting features are largely nullified by the inability to work at 100% view during the prescan stage! And PS, Corel etc. are FAR better at curve adjustment etc.

Regarding film settings - with slide film I generally use film type generic and color adjustment = none. This works just fine for me with Sensia, but with Kodak and Velvia, the shadows are just too dense. I find setting film type Kodachrome solves this problem. It could well be that if you are using "autolevels" or "white balance" this will already be giving you the correct results - the additional compensation provided by film type Kodachrome is then perhaps resulting in over-correction.

Cheers,

Colin



Colin K. Work, Pixstel
Top Of Page
Forum Index

This topic is archived and can not be replied to any more.

Printer friendly format

Similar topics:More similar topics...
Black & White posted Mon Jul 4 2005 15:26:01 by Edoca
Black & White/Sepia posted Fri May 6 2005 02:20:29 by Knighty
Black & White From Digital - Questions. posted Mon Sep 27 2004 01:29:57 by SlamClick
Black & White posted Tue Aug 20 2002 05:21:39 by Rendezvous
Black & White Photography posted Fri Mar 15 2002 19:20:55 by Redcap
Black And White Smudge Marks posted Sun Mar 27 2005 23:19:08 by DC10Tim
Black And White Photos Classier posted Fri Dec 12 2003 13:15:12 by Airmale
Black And White Pics? posted Thu Oct 23 2003 15:54:14 by Jer32382
Black And White posted Mon Jan 20 2003 03:35:14 by Jhooper
Gonna Try Out A Black And White Film Sampler posted Sun Jun 30 2002 15:13:33 by L-188