Synth-DIY Yahoo! Groups Archives

Re: poor man's densitometer?

2003-12-18 by bruce greene

thanks for the link Martin. I may give this a try. But  I don't think 
that my scanner is up to the task as it seems to clip the highlights 
slightly.
-bruce


On Thursday, December 18, 2003, at 03:25 AM, 
DigitalBlackandWhiteThePrint@yahoogroups.com wrote:

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> Bruce,
>
> Another idea for you. Go to:
>
> http://www.stouffer.net/Productlist.htm
>
> Contact Stouffer and purchase their 37-step calibrated reflection 
> guide,
> R3705-1/2C fro $29.60. This will come with density readings for each 
> step.
> If you have any kind of a flatbed scanner you can then scan this 
> calibrated
> target along with the 100-step wedge you print with your printer. From 
> the
> scan in Photoshop you can use the eyedropper tool to measure K values.
>
> With a bit of math you can use the scanned values and the calibrated 
> values
> to calculate the density values of the step wedge you printed.
>
> Martin Wesley
> www.carolynfrayn.com/Guests/MartinWesley/pages/MW_01.html
> www.borderless-photos.de/guests.html

RE: [Digital BW] Re: poor man's densitometer?

2003-12-18 by Martin Wesley

> -----Original Message-----
> From: bruce greene [mailto:bagreene@verizon.net] 
> Sent: Thursday, December 18, 2003 9:20 AM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Re: poor man's densitometer?
> 
> 
> 
> thanks for the link Martin. I may give this a try. But  I don't think 
> that my scanner is up to the task as it seems to clip the highlights 
> slightly.

Bruce,

That is a possibility with some of the flatbed scanners but in general
scanners do a better job punching through the dense negative highlights than
an enlarger. Check your scanning software as this may be the cause of your
clipping.

Martin Wesley
www.carolynfrayn.com/Guests/MartinWesley/pages/MW_01.html
www.borderless-photos.de/guests.html

Show quoted textHide quoted text

> 
> 
> On Thursday, December 18, 2003, at 03:25 AM, 
> DigitalBlackandWhiteThePrint@yahoogroups.com wrote:
> 
> > Bruce,
> >
> > Another idea for you. Go to:
> >
> > http://www.stouffer.net/Productlist.htm
> >
> > Contact Stouffer and purchase their 37-step calibrated reflection
> > guide,
> > R3705-1/2C fro $29.60. This will come with density readings 
> for each 
> > step.
> > If you have any kind of a flatbed scanner you can then scan this 
> > calibrated
> > target along with the 100-step wedge you print with your 
> printer. From 
> > the
> > scan in Photoshop you can use the eyedropper tool to 
> measure K values.
> >
> > With a bit of math you can use the scanned values and the calibrated
> > values
> > to calculate the density values of the step wedge you printed.
> >
> > Martin Wesley 
> > www.carolynfrayn.com/Guests/MartinWesley/pages/MW_01.html
> > www.borderless-photos.de/guests.html
>

Digital BW, The Print

Re: poor man's densitometer?

Re: poor man's densitometer?

RE: [Digital BW] Re: poor man's densitometer?

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