Page 17 of 17 FirstFirst ... 7151617
Results 161 to 166 of 166

Thread: Scanning DPI

  1. #161

    Join Date
    Sep 2003
    Location
    South Carolina
    Posts
    5,170

    Re: Scanning DPI

    Quote Originally Posted by Jim Graves View Post
    Well, as one of the probably 98% of the population of this board that understands about 2% of the technical discussion herein ... I'd have to agree with Bensyverson ... when I see one of those gapped histograms, I just assume I've completely screwed up my image ... why else would it look like that? ... and that way too much of the original information is now gone and were I to try to print it there would be a huge decrease in detail and tonal values. So, I back up and start over.

    This discussion thread has been very enlightening on that and several other valuable points.

    You might think of the hole in the histogram in terms of the final print as an early indicator of lung cancer in the human body. Early on there is an irritating cough that indicates something is amiss, but the body is able to continue with its normal activities. Then the hole in the histogram gets larger and larger and eventually the image implodes on itself, and the cough becomes more and more incessant as the cancer grows and the body tries to reject it. Ultimately the result is visual disaster with the print, death to the body.

    Sandy King
    http://www.sandykingphotography.com/
    For discussion and information about carbon transfer please visit the carbon group at Yahoo.
    https://groups.yahoo.com/neo/groups/...nTransfer/info

  2. #162

    Join Date
    Jun 2009
    Posts
    48

    Re: Scanning DPI

    This thread was a great reading. Thanks to All.

  3. #163

    Join Date
    Aug 2007
    Location
    Sacramento, CA
    Posts
    47

    Re: Scanning DPI

    What's the results on the prints? I have a Colorgetter drum scanner running on a software than can only scan 8-bit. The upgrade software is almost 1k..and that's for having the capability of 16 bit. The information I've ingested here might just save me the 1k

  4. #164

    Join Date
    Dec 1997
    Location
    Baraboo, Wisconsin
    Posts
    7,695

    Post Re: Scanning DPI

    Quote Originally Posted by sanking View Post
    You might think of the hole in the histogram in terms of the final print as an early indicator of lung cancer in the human body. Early on there is an irritating cough that indicates something is amiss, but the body is able to continue with its normal activities. Then the hole in the histogram gets larger and larger and eventually the image implodes on itself, and the cough becomes more and more incessant as the cancer grows and the body tries to reject it. Ultimately the result is visual disaster with the print, death to the body.

    Sandy King
    And I thought darkroom chemicals were risky! : - )
    Brian Ellis
    Before you criticize someone, walk a mile in their shoes. That way when you do criticize them you'll be
    a mile away and you'll have their shoes.

  5. #165

    Join Date
    Dec 1997
    Location
    Baraboo, Wisconsin
    Posts
    7,695

    Re: Scanning DPI

    Quote Originally Posted by Ken Lee View Post
    "I owned a 4990 for a few years and tested it several times with a resolution target. Depending on how optimistically I evaluated the target the effective resolution was between 30-35 lp/mm, or about 1600-1800 ppi".

    Your numbers sound just right for my test results. I don't have a target, but I see a modest increase when going from 1200 to 2400 - but nothing after that, except more pixels.

    So roughly 4x is around my max enlargement - which for 4x5 and 5x7, is good enough.
    I seem to recall the late and sorely missed Ted Harris testing a 4990 and he concluded that 2100 give or take 100 was the maximum it could resolve.
    Brian Ellis
    Before you criticize someone, walk a mile in their shoes. That way when you do criticize them you'll be
    a mile away and you'll have their shoes.

  6. #166

    Join Date
    Jun 2006
    Location
    Brooklyn, NY
    Posts
    89

    Re: Scanning DPI

    So were the prints ever made? I'm curious to hear/see how this all turned out over a year later.

Similar Threads

  1. DPI Scanning
    By Jacques-Mtl in forum Digital Processing
    Replies: 1
    Last Post: 9-Oct-2009, 13:34
  2. scanners at 600 dpi and 1200 dpi.
    By Bob McCarthy in forum Digital Hardware
    Replies: 3
    Last Post: 26-Feb-2009, 14:07
  3. Scanning B+W Film
    By GSX4 in forum Digital Hardware
    Replies: 6
    Last Post: 16-Jul-2008, 13:59
  4. Aliasing and scanning resolutions
    By Ed Richards in forum Digital Hardware
    Replies: 31
    Last Post: 20-Oct-2005, 22:35
  5. Scanning and Digital Printing question
    By Josh Divack in forum Digital Hardware
    Replies: 9
    Last Post: 22-Aug-2001, 07:01

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •