color scanning

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  • Jomama46
    Field Supervisor

    Site Contributor
    2,500+ Posts
    • Apr 2008
    • 2900
    #1

    color scanning

    A customer called and said that they were not able to scan in color on their DSc525. (Scan to Email). I told them how to change to color scan in the scan setting menu and they say it still wont go. BW is fine.
    So I told them it was the file size and sent a tech over there to look at it.

    Without checking I had always thought that a color scan would be larger in size but it isnt. I scanned a single color brochure on the C2050 in the showroom 3 ways and got the following results: Black/white PDF 466K; Color PDF 217K; Color Jpeg 216K

    Just one page and all looked fine on my screen.
    Does this seem strange?
    sigpic
    You never realize how cheap a professional is until after you let an amateur do it.
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    • sandmanmac
      Field Supervisor

      Site Contributor
      2,500+ Posts
      • Feb 2009
      • 3981
      #2
      Re: color scanning

      All things being equal. I've always found colour scans to be much larger than B&W.
      Having not used the C2050 yet myself, is it possible to independently set the resolutions set for both B&W and colour? In other words, any chance that B&W was set higher on your machine?
      with regard to your client's issue, I'm unclear on exactly what you meant. Are they getting an error, blank pages or just always B&W? In any case, maybe an SP5-801 on the scanner might rectify. I experienced the scanner sending blank pages quite a few times years ago (using scanrouter) that a reset took care of

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        • Jomama46
          Field Supervisor

          Site Contributor
          2,500+ Posts
          • Apr 2008
          • 2900
          #3
          Re: color scanning

          Color scans just dont arrive. Checking the log, its says "transmitting"
          sigpic
          You never realize how cheap a professional is until after you let an amateur do it.
          A+; Network +; PDI+

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            • mikadonovan
              Senior Tech

              Site Contributor
              2,500+ Posts
              • May 2008
              • 2931
              #4
              Re: color scanning

              Yes, that is strange. I just did the same thing on a mp8001. All scans at 300 dpi > B/W PDF-130k > Color JPEG- 361k > Color PDF-357k.
              NEVER ASSUME ANYTHING

                Comment

                • Jomama46
                  Field Supervisor

                  Site Contributor
                  2,500+ Posts
                  • Apr 2008
                  • 2900
                  #5
                  Re: color scanning

                  Just did it again. Resolution is the same on all three. How can a BW scan be so much bigger?
                  sigpic
                  You never realize how cheap a professional is until after you let an amateur do it.
                  A+; Network +; PDI+

                    Comment

                    • mikadonovan
                      Senior Tech

                      Site Contributor
                      2,500+ Posts
                      • May 2008
                      • 2931
                      #6
                      Re: color scanning

                      Originally posted by Jomama46
                      So I told them it was the file size
                      That would be my thought, also.
                      NEVER ASSUME ANYTHING

                        Comment

                        • Jomama46
                          Field Supervisor

                          Site Contributor
                          2,500+ Posts
                          • Apr 2008
                          • 2900
                          #7
                          Re: color scanning

                          Originally posted by mikadonovan
                          Yes, that is strange. I just did the same thing on a mp8001. All scans at 300 dpi > B/W PDF-130k > Color JPEG- 361k > Color PDF-357k.
                          This is what I would expect! Thx Mika,
                          sigpic
                          You never realize how cheap a professional is until after you let an amateur do it.
                          A+; Network +; PDI+

                            Comment

                            • mikadonovan
                              Senior Tech

                              Site Contributor
                              2,500+ Posts
                              • May 2008
                              • 2931
                              #8
                              Re: color scanning

                              Originally posted by Jomama46
                              Just did it again. Resolution is the same on all three. How can a BW scan be so much bigger?
                              The machine is possessed, or maybe Ricoh has made some image processing tweaks to improve B/W scan quality. I dunno.
                              NEVER ASSUME ANYTHING

                                Comment

                                • Jomama46
                                  Field Supervisor

                                  Site Contributor
                                  2,500+ Posts
                                  • Apr 2008
                                  • 2900
                                  #9
                                  Re: color scanning

                                  Originally posted by sandmanmac
                                  All things being equal. I've always found colour scans to be much larger than B&W.
                                  Having not used the C2050 yet myself, is it possible to independently set the resolutions set for both B&W and colour? In other words, any chance that B&W was set higher on your machine?
                                  with regard to your client's issue, I'm unclear on exactly what you meant. Are they getting an error, blank pages or just always B&W? In any case, maybe an SP5-801 on the scanner might rectify. I experienced the scanner sending blank pages quite a few times years ago (using scanrouter) that a reset took care of
                                  BTW I remember that issue with the blank scans, on the 1022/1027.
                                  sigpic
                                  You never realize how cheap a professional is until after you let an amateur do it.
                                  A+; Network +; PDI+

                                    Comment

                                    • sandmanmac
                                      Field Supervisor

                                      Site Contributor
                                      2,500+ Posts
                                      • Feb 2009
                                      • 3981
                                      #10
                                      Re: color scanning

                                      Maybe you were using something other than the "text" setting? Because I tried again with some other settings and they can become quite large (1 page on a C3500 at 200DPI):
                                      B&W
                                      text: 70Kb
                                      line art: 329Kb
                                      text/photo:376
                                      Photo:417Kb

                                      full colour text/photo
                                      192Kb

                                        Comment

                                        • KenB
                                          Geek Extraordinaire

                                          2,500+ Posts
                                          • Dec 2007
                                          • 3944
                                          #11
                                          Re: color scanning

                                          I would think it's because color scans can be compressed, whereas B&W cannot.

                                          I don't remember which model that started with, but it may be a good idea to checks some of the sales literature, oddly enough.

                                          It's probable that color scan compression is on by default, but I'm not sure. It could also be that someone cranked it to maximum compression without your ever knowing it. Of course, that would never happen, right?

                                          Also, one page may vary drastically in scan size from the next, depending on the image.

                                          Your mileage may vary, as they say.
                                          “I think you should treat good friends like a fine wine. That’s why I keep mine locked up in the basement.” - Tim Hawkins

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                                            • Jomama46
                                              Field Supervisor

                                              Site Contributor
                                              2,500+ Posts
                                              • Apr 2008
                                              • 2900
                                              #12
                                              Re: color scanning

                                              I think that must be the diff. I noticed that it was defaulted to line art. I will try text setting.
                                              sigpic
                                              You never realize how cheap a professional is until after you let an amateur do it.
                                              A+; Network +; PDI+

                                                Comment

                                                • sandmanmac
                                                  Field Supervisor

                                                  Site Contributor
                                                  2,500+ Posts
                                                  • Feb 2009
                                                  • 3981
                                                  #13
                                                  Re: color scanning

                                                  Originally posted by KenB

                                                  It's probable that color scan compression is on by default, but I'm not sure. It could also be that someone cranked it to maximum compression without your ever knowing it. .
                                                  Good call. I just turned 'off' B&W compression in scanner features/send settings, and my original page of 70Kb went to 429Kb

                                                    Comment

                                                    • Jomama46
                                                      Field Supervisor

                                                      Site Contributor
                                                      2,500+ Posts
                                                      • Apr 2008
                                                      • 2900
                                                      #14
                                                      Re: color scanning

                                                      What a difference between "line art/text" and "text"
                                                      BW pdf 40k and color pdf 150k. This time I only changed to "text"

                                                      UT scan setting are at default: BW compression on and Color compression on level 4 (2nd from the highest)

                                                      Also my original is different, previously it was the front of a brochure, lots of pix and this last one was a simple text doc.
                                                      Very interesting.
                                                      sigpic
                                                      You never realize how cheap a professional is until after you let an amateur do it.
                                                      A+; Network +; PDI+

                                                        Comment

                                                        • Llama God
                                                          Service Manager

                                                          1,000+ Posts
                                                          • Mar 2009
                                                          • 1353
                                                          #15
                                                          Re: color scanning

                                                          Have you seen the new high-compression PDF scan setting on the MPc3502 type machines? It's bloody marvellous!

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