Mike Chaney's Tech Corner
March 29, 2024, 01:46:50 PM *
Welcome, Guest. Please login or register.
Did you miss your activation email?

Login with username, password and session length
News: Qimage registration expired? New lifetime licenses are only $59.99!
 
  Home Help Search Login Register  

Professional Photo Printing Software for Windows
Print with
Qimage and see what you've been missing!
  Show Posts
Pages: [1]
1  Technical Discussions / Computer Hardware / Re: Profiling a Canon 8400F on: January 28, 2013, 08:37:52 PM
Hi,
      I finally obtained 'reasonable' scanning results.
Firstly for anyone who has followed this item, don't make the same mistake as I did. Because I had a high quality print and its digital origin file, I was comparing my scan results the the origin file, both in PS7. Don't do that. Instead, under good daylight conditions compare the scanned image with the scan on screen. Here is what I did using the Canon software:
       With the IT8 target and the high quality print sample (because it has a greyscale) in place on the platten, open CanoScan Toolbox. Enter a filename and set a destination to save the scan to ( eg Desktop ).Set a programme to view the scan in. Scan - opens ScanGear CS with an image preview. Reset any image adjustments. Execute a scanner calibration.
      Sample white and neutral grey patches and adjust the black slider on the histogram. This gave readings on the histogram of 28,142,255. Re sample the neutral grey and white patches. This gave histogram readings readings of 28,128,255. Save the setting for use with future photo scans. Select the IT8 target.
      Scan. Open the scanned file in PP and set the corner markers. This gave a message 243 = exposure, 0% white balance , 4% lighting variance, 2 patches marked as 'X' and excellent shadow detail.
       Create Profile.
       Smile and enjoy.
2  Technical Discussions / Computer Hardware / Re: Profiling a Canon 8400F on: January 21, 2013, 06:04:32 PM
Thanks for the suggestion Ray but Terry is quite right. My version of PP only permits editing of printer profiles.
3  Technical Discussions / Computer Hardware / Re: Profiling a Canon 8400F on: January 20, 2013, 10:50:41 PM
Hi Terry-M,
Thanks for your response. I am using the Canon software and assign the profile in PS7. Have tried both the Canon and PP derived profiles. I also have an Epson PX730WD all-in-one from which I get similar results to the Canon.
Following your message I have downloaded the trial version of ViewScan which doesn't appear to have any more features than the Canon software. A scan from ViewScan gives a very similar appearance to scans from Canon and Epson software. However, I cannot produce a profile with the trial version so cannot conclude anything from that other than all the basic scans look 'similar' with whites all looking more grey so I don't feel inclined to splash the cash just yet.
The message in PP in the Canon profile from the IT8 target shows good exposure, WB, LV, low number of patches marked 'X' and excellent shadow detail and a good histogram with no clipping.
I had the thought that perhaps PP had become corrupted so I did an uninstall and reinstall with no change in outcome.
This is a complete mystery to me especially as I have profiled many many printer, paper and ink combinations with very good results.
Perhaps my methodology is at fault. I shall reread the PP help pages yet again. Meanwhile I look forward to any more comments that you and others might have.
4  Technical Discussions / Computer Hardware / Profiling a Canon 8400F on: January 19, 2013, 03:34:34 PM
I cannot get decent results after profiling through PP and would appreciate any suggestions. I have a high quality colour print from a supplier of professional inks and paper and its digital source file. In PS7 the print compares well with the digital file. However, a scan of the print to PS7 is nowhere close. Sampling white from the scan for example yields 235/235/236 (R G B ) whereas sampling the digital file yields 255/255/255. Beside white, colours are way off too. These results apply with and without assigning a profile ( PP or Canon supply )
The only way I can get decent scan quality is to sample white in the scanning software and to apply some curves adjustments in PS7 after assigning the Canon profile, all rather defeating the purpose of profiling the scanner. Has anybody got any suggestions pleeeese?
Pages: [1]
Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!
Security updates 2022 by ddisoftware, Inc.