Page 6 of 6 FirstFirst ... 456
Results 51 to 53 of 53

Thread: Can multiple scans increase resolution?

  1. #51

    Join Date
    Jun 2014
    Posts
    2,084

    Re: Can multiple scans increase resolution?

    Quote Originally Posted by djdister View Post
    So what everyone is talking about, I presume, is getting better resolution than the nominal max resolution of a given film scanner, right?
    Yes, although a bit more accurately: higher resolution than the maximum real-life resolution that the scanner yields, which is usually significantly less than its nominal resolution, especially with flatbed and low-end film scanners. E.g. the Epson 4990/V7x0 boasts a nominal resolution of 3200dpi, while in real life, it resolves around 2000dpi max.

    No one is saying you can get better resolution in a digital file than what the film is capable of resolving, are they?
    Not that I know of, no. You can't make up information that isn't there to begin with.

  2. #52
    Abuser of God's Sunlight
    Join Date
    Aug 2004
    Location
    brooklyn, nyc
    Posts
    5,796

    Re: Can multiple scans increase resolution?

    Quote Originally Posted by djdister View Post
    No one is saying you can get better resolution in a digital file than what the film is capable of resolving, are they?
    It also applies to a digital camera sensor. Multiple exposures, offset by sub-pixel amounts, can yield an effective resolution higher than what's possible with a single exposure.

    This is what I tested. I did get an improvement in resolution, but the results of my one attempt didn't happen to look good.

  3. #53
    Randy's Avatar
    Join Date
    Dec 2010
    Location
    Virginia, USA
    Posts
    1,486

    Re: Can multiple scans increase resolution?

    I have a friend who shoots planetary photos with a little 1 to 2mb webcam through his telescope. The scope is tracking, say, Saturn or Jupiter, and the program on his laptop will take numerous photos every minute to around 400 photos. The program then picks out the best images and then stacks them. He gets a "better" image by this method than if he just shot one picture with the webcam. I am guessing this is kind of what we are discussing here...?

    Two of his pictures



    https://dl.dropboxusercontent.com/u/52893762/bigger4b.jpg

Similar Threads

  1. Creating Digital Text: Scans of Negatives vs Scans of Optical Prints
    By dodphotography in forum Digital Processing
    Replies: 13
    Last Post: 1-Mar-2014, 12:27
  2. How Lower Resolution Lens Works on Large High Resolution Wet Plate Negative
    By Mustafa Umut Sarac in forum Lenses & Lens Accessories
    Replies: 2
    Last Post: 16-Jan-2014, 15:04
  3. HP5+ price increase
    By gevalia in forum Darkroom: Film, Processing & Printing
    Replies: 10
    Last Post: 18-Sep-2011, 15:47
  4. Multiple scans: benefits?
    By Marco Annaratone in forum Style & Technique
    Replies: 6
    Last Post: 31-Jan-2005, 08:02
  5. Tilt will increase DOF by how much?
    By Mike Mahoney in forum Style & Technique
    Replies: 12
    Last Post: 23-Feb-2001, 19:17

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
  •