Archived posting to the Leica Users Group, 2005/11/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]It's just not my day, sorry Richard it was Peter K's image. Wake up Sharp!!!! :-( Douglas Douglas Sharp wrote: > OOPS! > just looked at my analysis again - the dark lines correspond to the > lighter areas which are, of course the same colour as the spots, silly > me!!!! > Douglas > > Douglas Sharp wrote: > >> Hi Richard, >> I analysed your image - here are most of your spots - at least those >> which are around 1 pixel in size, amybe this helps to get closer to >> the problem and a possible(partial fix. >> http://gallery.leica-users.org/New-Old-Pictures/1_25WhiteSpots_Difference >> >> Difference analysis - spot distribution >> http://gallery.leica-users.org/New-Old-Pictures/1_25WhiteSpots_HPF_1 >> 1st iteration (pass) of Hot Pixel Fix >> http://gallery.leica-users.org/New-Old-Pictures/1_25WhiteSpots_HPF_2 >> 2nd iteration HPF >> >> Running HPF twice seems to get rid of a few more spots, the residual >> spots can easily be edited out with "healing brush" in PS, I think >> the analysis shows that these are minute particles, probably out of >> your water supply, a couple of microns in size which would pass most >> water filters,, the larger particles are probably airborne dust (1 >> remains on the window pane, 1 to the right of the horizontal handrail >> around the centre of the image. On a full resoluition input it would >> probably be more effective.. >> >> Processing sequence: >> >> 1. input original image >> 2. convert to RGB >> 3. Duplicate >> 4. Apply Hot Pixel Fix (mediachance.com DCE Tools) >> 5. Select all on duplicate >> 6. paste to original as layer >> 7. Extract difference (100%) >> 8. flatten image >> 9. increase levels for display and save >> >> This image shows exactly what HPF is extracting from your original >> image - to remove spots just run 1,2 and 4 (I ran 4 twice) - it >> worked wonders on some 1950s negs I scanned for my parents. >> The result is quite interesting when you look at the distribution, >> there's a definite grid pattern which doesn't relate to the structure >> of the original image, did you flat-dry the negs on some kind of frame?. >> Douglas >> >> Douglas Sharp wrote: >> >>> Hi Richard, >>> try scanning the neg as if if it was a colour slide 1) without >>> FARE 2) with FARE, if they persist it is the negative, and not >>> the scanner. Of course you get a negative image which will show the >>> spots even better, so you can see if they're evenly distributed. If >>> they are concentrated in one place, for example the bottom edge or >>> towards the bottom of the film strip when it was hung up to dry, it >>> could mean that the negatives went spotty during the washing and >>> drying process - perhaps fine particles of scale in the (hard?) tap >>> water. >>> Just a suggestion >>> Douglas >>> >>> >>> Richard wrote: >>> >>>> I seem to get more of those with Efke 100 than Tri X and HP5+, even >>>> though everything else is the same. (I developed my own using Jobo) >>>> >>>> At 11:08 PM 11/20/2005, Peter Klein wrote: >>>> >>>>> There were a lot of miniscule white spots on my Neopan 400 negs >>>>> from San Francisco. I don't usually get these, at least not with >>>>> Tri-X or T400CN. This picture is a 1:1 snippet of the "vertigo" >>>>> picture from my SF gallery, but scanned on my Canon FS-4000us at >>>>> 4000 dpi. The spots are most visible on the windows at the right, >>>>> but they are actually all over the whole negative. >>>>> http://gallery.leica-users.org/album186/1_25WhiteSpots >>>>> >>>>> The negs were developed at the same lab I usually use. What is >>>>> all that white crud? Grain aliasing? Improper fixing? Chemical >>>>> residue? Seems too prevalent to be dust. I couldn't see anything >>>>> with my 22x loupe. But I could see many of the same spots both on >>>>> the low-res Noritsu scans from the lab, and on a couple of >>>>> pictures I rescanned myself at 4000 dpi. So something on the >>>>> negative is making those spots. >>>>> >>>>> I know better than to use ICE (FARE actually) with real B&W, so >>>>> that isn't it. >>>>> >>>>> --Peter >>>> >>>> >>>> >>>> >>>> >>>> // richard (This email is for mailing lists. To reach me directly, >>>> please use richard at imagecraft.com) >>>> >>>> _______________________________________________ >>>> Leica Users Group. >>>> See http://leica-users.org/mailman/listinfo/lug for more information >>>> >>>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >>> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >