Would you folks trim your repls down? As you can see from below, they are getting reeeeally long. Makes for lots of scrolling while reading the digest. Thanks, Jon > From: DigitalBlackandWhiteThePrint@yahoogroups.com > Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com > Date: 23 Dec 2003 11:22:45 -0000 > To: DigitalBlackandWhiteThePrint@yahoogroups.com > Subject: [Digital BW] Digest Number 1991 > > > Message: 4 > Date: Mon, 22 Dec 2003 20:48:19 +0000 > From: Steve Kale <stevekale@...> > Subject: Re: Calculating density values with Eye-One > > -log10(Y) !! ah stupid fingesr ! :-) > > > From: Steve Kale <stevekale@...> > Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com > Date: Mon, 22 Dec 2003 20:42:45 +0000 > To: <DigitalBlackandWhiteThePrint@yahoogroups.com> > Subject: Re: [Digital BW] Calculating density values with Eye-One > > log10 (Y) delivers right looking values if Y is the Y value from the Measure > Tool in XYZ divided by 100 > > > From: Steve Kale <stevekale@...> > Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com > Date: Mon, 22 Dec 2003 20:25:07 +0000 > To: <DigitalBlackandWhiteThePrint@yahoogroups.com> > Subject: Re: [Digital BW] Calculating density values with Eye-One > > So density is always a negative number? I thought we talked about density > figures as positive numbers eg a dMax of 1.64. In Roy¹s calibration doc he > has numbers like 127, 121, 131.... (I am taking the middle number from the > Sample spot measurement in the XYZ space using Measure Tool¹s Spot > Measurement function ie a dark black is producing a y value of around 2.0) > > Is there a useful book for this kind of stuff? > > (Re the Eye-One, I was about to do exactly the same thing.) > > Presumably the level of 60 for LK was set using the process described in the > Calibration document.... > > > Ahhh I am getting lost here.... > > > From: Carl Schofield <scho@mac.com> > Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com > Date: Mon, 22 Dec 2003 14:48:56 -0500 > To: DigitalBlackandWhiteThePrint@yahoogroups.com > Subject: Re: [Digital BW] Calculating density values with Eye-One > > Steve, > > You can calculate density from either the "L" values from the LAB data > or directly from the "Y" number in the XYZ data: > > If L > 8 > Y = ((L + 16)/116)^3 > Else > Y = (L * 27)/24389 > > Density = -log10(Y) > > I have no problems with the eye-one rubbing on the patches when using > the strip reader. I have attached an 8.5x11 inch sheet of pictorico > high gloss white film to the underside of the back edge of the strip > ruler so the feet on the eye-one slide more smoothly when making strip > measurements. > > Carl > On Monday, December 22, 2003, at 02:28 PM, Steve Kale wrote: > >> From my other posts you can see that I am trying to improve my >> knowledge of QTR. >> However, I also have a very basic question potentially applicable to a >> broader >> audience. How can I use an Eye-One Photospectrometer to calculate >> density values. I >> can see how to take a spot measurement of a patch and get an answer in >> a variety of >> colour spaces but how are these then converted to density values? >> >> Thanks >> >> Steve >> >> PS: do others have problems with the Eye-One rubbing along the >> surface of patch >> strips when using the strip ruler? > > > [Non-text portions of this message have been removed] > > > > Please visit the Group Homepage to check the Files, and other resources as > they are often being updated. > > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint > > If you wish to receive no emails or just a daily digest, or you wish to > unsubscribe, please edit your Membership preferences by visiting this same > page. > > Please follow these basic guidelines: > - As threads develop, trim off excess portions of earlier messages to keep > them short. > - Good manners are required at all time. No personal attacks or flames. > Hostile, aggressive or argumentative users may be removed from the > membership without notice. > - Keep your posts and threads related to the group topic of digital B&W > printing. Users who persistently make off-topic posts may be removed from > the membership. > - By posting on this forum you agree to abide by the group rules and > guidelines, and to abide by the actions and decisions of the group Owner and > Moderators. See Group Topic, Rules and Guidelines in the Files section: > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/ > > BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT > YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE OWNER AND > MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO YOU > FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY > DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS, > GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE OWNER AND > MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE > POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY > TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO OR > ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT OF ANY > THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER > MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP. > > > > > Yahoo! Groups Links > * To visit your group on the web, go to: > * http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/ > * > * To unsubscribe from this group, send an email to: > * DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com > <mailto:DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com?subject=Uns > ubscribe> > * > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service > <http://docs.yahoo.com/info/terms/> . > > > > > [Non-text portions of this message have been removed] > > > > Please visit the Group Homepage to check the Files, and other resources as > they are often being updated. > > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint > > If you wish to receive no emails or just a daily digest, or you wish to > unsubscribe, please edit your Membership preferences by visiting this same > page. > > Please follow these basic guidelines: > - As threads develop, trim off excess portions of earlier messages to keep > them short. > - Good manners are required at all time. No personal attacks or flames. > Hostile, aggressive or argumentative users may be removed from the > membership without notice. > - Keep your posts and threads related to the group topic of digital B&W > printing. Users who persistently make off-topic posts may be removed from > the membership. > - By posting on this forum you agree to abide by the group rules and > guidelines, and to abide by the actions and decisions of the group Owner and > Moderators. See Group Topic, Rules and Guidelines in the Files section: > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/ > > BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT > YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE OWNER AND > MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO YOU > FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY > DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS, > GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE OWNER AND > MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE > POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY > TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO OR > ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT OF ANY > THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER > MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP. > > > > Yahoo! Groups Sponsor > > ADVERTISEMENT > <http://rd.yahoo.com/SIG=12chc87c6/M=266841.4316200.5507732.1261774/D=egrou > pweb/S=1705019182:HM/EXP=1072211112/A=1911858/R=0/*http://www.lifescapeinc.c > om/picasa/landing.php?capid=222&caId=1987> > > > Yahoo! Groups Links > * To visit your group on the web, go to: > * http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/ > * > * To unsubscribe from this group, send an email to: > * DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com > <mailto:DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com?subject=Uns > ubscribe> > * > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service > <http://docs.yahoo.com/info/terms/> . > > > > > [Non-text portions of this message have been removed] > > > > Please visit the Group Homepage to check the Files, and other resources as > they are often being updated. > > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint > > If you wish to receive no emails or just a daily digest, or you wish to > unsubscribe, please edit your Membership preferences by visiting this same > page. > > Please follow these basic guidelines: > - As threads develop, trim off excess portions of earlier messages to keep > them short. > - Good manners are required at all time. No personal attacks or flames. > Hostile, aggressive or argumentative users may be removed from the > membership without notice. > - Keep your posts and threads related to the group topic of digital B&W > printing. Users who persistently make off-topic posts may be removed from > the membership. > - By posting on this forum you agree to abide by the group rules and > guidelines, and to abide by the actions and decisions of the group Owner and > Moderators. See Group Topic, Rules and Guidelines in the Files section: > http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/files/ > > BY PARTICIPATING IN AND/OR POSTING MESSAGES TO THE DIGITAL BW, THE PRINT > YAHOO! GROUP YOU EXPRESSLY UNDERSTAND AND AGREE THAT THE OWNER AND > MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP SHALL NOT BE LIABLE TO YOU > FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL OR EXEMPLARY > DAMAGES, INCLUDING BUT NOT LIMITED TO, DAMAGES FOR LOSS OF PROFITS, > GOODWILL, USE, DATA OR OTHER INTANGIBLE LOSSES (EVEN IF THE OWNER AND > MODERATORS OF DIGITAL BW, THE PRINT YAHOO GROUP HAVE BEEN ADVISED OF THE > POSSIBILITY OF SUCH DAMAGES), RESULTING FROM: (i) THE USE OR THE INABILITY > TO USE THE DIGITAL BW, THE PRINT YAHOO GROUP; (ii) UNAUTHORIZED ACCESS TO OR > ALTERATION OF YOUR TRANSMISSIONS OR DATA; (iii) STATEMENTS OR CONDUCT OF ANY > THIRD PARTY ON THE DIGITAL BW, THE PRINT YAHOO GROUP; OR (iv) ANY OTHER > MATTER RELATING TO THE DIGITAL BW, THE PRINT YAHOO GROUP. > > > > > Yahoo! Groups Links > * To visit your group on the web, go to: > * http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint/ > * > * To unsubscribe from this group, send an email to: > * DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com > <mailto:DigitalBlackandWhiteThePrint-unsubscribe@yahoogroups.com?subject=Uns > ubscribe> > * > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service > <http://docs.yahoo.com/info/terms/> . > > > > > [Non-text portions of this message have been removed]
Message
Re: Calculating density values with Eye-One
2003-12-23 by Jon