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Title: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: tonygamble on January 29, 2013, 01:02:30 PM I'm getting about eighty rejected rectangles with PP and I keep giving it darker and darker tifs from Vuescan.
Any clues friends? Tony Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: tonygamble on January 29, 2013, 03:56:27 PM I have looked at those rectangles. They are in the yellow at the top. They have Red crosses which I read to be overexposure.
I had about 77 of them after the last scan. However they are not sequential. I get the odd cross and then a few without crosses. I assume this is more a signal that the test print is not quite right rather then a matter of total over-exposure - which would presumably result in a red cross everywhere. I let PP make a profile and the result said something like 24-255 0-255 0-255. The print from the profile is acceptable. If I did not know the real colour of the jumper being worn by that lady I would have been happy with it. Tinker time is due. Tony Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: Terry-M on January 29, 2013, 07:01:48 PM Quote and I keep giving it darker and darker tifs from Vuescan. Modifying the scan image is a no-no and if out-putting a raw scan it makes no difference.When you open the scanned image in PP and it asks if it is a 48bit tiff with linear gamma, are you answering 'Yes'? - amusing it is a raw 48 bit tiff from Vuescan. Terry Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: tonygamble on January 29, 2013, 07:17:55 PM "When you open the scanned image in PP and it asks if it is a 48bit tiff with linear gamma, are you answering 'Yes'?"
Should I say No then? EDIT. Reading you again I guess I answer Yes. Tony Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: Terry-M on January 29, 2013, 10:16:12 PM Hi Tony.
Quote EDIT. Reading you again I guess I answer Yes. Correct.Although the reported numbers from PP were not wonderful, a decent profile will still be created. What did the histogram in PP look like, can you show a screen shot. 24-255 0-255 0-255 is ok I think, depends on the paper too. Terry Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: tonygamble on January 30, 2013, 03:21:24 PM Terry,
This is the error report from the printer target. You might be able to see the randon red crosses on the top line of the chart. (http://www.tonygamble.org/profiles/printer%20target%20report.jpg) This is the profile info when created. (http://www.tonygamble.org/profiles/profile%20created.jpg) The profile prints fine but I am still struggling to get that jumper the right colour. I'll probably be back for more tuition. Tony Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: Terry-M on January 31, 2013, 08:57:22 AM Quote This is the error report from the printer target. You might be able to see the random red crosses on the top line of the chart. I think the numbers I got with the Ilford matt paper were similar or a little worse; your histogram is better. If you right click on cross, you see the RGB values. PP will make a cross if any RGB number is close to zero or 255.Quote The profile prints fine but I am still struggling to get that jumper the right colour I found, when editing the matt paper profile, I needed to reduce the saturation and reduce contrast to match the test print in the editor. NB. this means the edited profile gave more saturation and contrast; remember you edit to match the test print.Terry Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: tonygamble on January 31, 2013, 12:45:57 PM Thanks Terry,
My matte profile needed more saturation and less brightness. I seem to find the Tweaking Wizard harder to control than the RGB sliders. Also I find it hard to bring back to a default - by that I mean that after saving an adjustment when I go back into the Tweaker the left and right display boxes are different colours. (http://www.tonygamble.org/profiles/tweaker-1.jpg) The small right hand panel is quite different to the big one and what I did was to Apply the tweaker. It closed and when I called it up again it looked as above. The route I am following is to try to get the colour right (in the case of the lady in the test file it is a matter of adding more red or more magenta to her sweater). Once I have got the colour similar I then work on the saturation and brightness. I feel more in control than using the Tweaker. Tony Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: Terry-M on January 31, 2013, 01:38:05 PM Quote I seem to find the Tweaking Wizard harder to control than the RGB sliders. I find the same.Quote it is a matter of adding more red or more magenta to her sweater) Don't you mean reducing to match the print? This editor works the opposite way round to an image editor, reduce t increase in the print and visa-versa.Terry Title: Re: I keep darkening my Printer Target in Vuescan but it is still overexposed in PP Post by: tonygamble on January 31, 2013, 02:00:03 PM "Don't you mean reducing to match the print?"
Yes, I do. I think there is a bug in the Tweaker. If, before you re-use the Tweaker, you use the yellow arrow on the big screen and say you want to Go Back again and start from scratch the Tweaker comes back with the left and right hand panels looking different (as in my screen shot). Maybe this is intended, but I can't see why. (http://www.tonygamble.org/profiles/tweaker-2.jpg) Where the Tweaker is a help is in showing that to remove magenta you drop green and add red and blue. Working with R G and B is intuitive. Yellow Cyan and Magenta less so. |