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Scanning And TrueCrypt Question

Discussion in 'Tech Talk' started by sks man, Apr 5, 2009.

  1. sks man

    sks man

    96
    0
    Mar 6, 2007
    If you were going to scan multiple documents and save them in TrueCrypt on a portable USB drive, would you scan/save them as JPEG, TIF, BMP, or PNG files?
     
  2. Furant

    Furant Millennium Member

    441
    0
    Oct 14, 1999
    Roswell, GA
    Depends upon the documents. For B&W text, I'd probably use TIFs. For color with images, I'd probably use JPEG (maybe PNG). It would also depend upon how important the documents were and how crisp the scan is an if some degradation from compression would be a big deal or not.
     


  3. sks man

    sks man

    96
    0
    Mar 6, 2007
    Thanks jferrante.

    What is the difference between JPEG and TIF? My scans would be 95% B+W. Would I be at a disadvantage by making everything JPEG or everything TIF?

    I just want to make the files as easy to open as possible on any computer if needed.
     
  4. Sgt. Schultz

    Sgt. Schultz Annoying Member

    Jpeg's are smaller and use compression, TIFF's are larger and do not use compression so 100% of the data captured during scanning is retained.
     
  5. JimmyN

    JimmyN

    1,266
    7
    Sep 29, 2006
    Virginia
    TIFF's and BMP's will produce the largest file size since they are not compressed. But they are also sharper because there are no compression artifacts and each pixel retains the original information. Those are best for photo type images that you will want to print, and editing and re-saving doesn't degrade the image.

    JPG's and PNG's use compression so the file size will be a fraction of that same image if saved in bmp or tif format. You can also set the degree of compression with a jpg, from 90% compression to no compression at all.

    GIF's are also compressed but have a limited color palette as well, usually only 8 bits per pixel. But for B&W images a gif will produce good results with a small file size.

    Scan a document in several formats to test. Then look at each and choose the one that gives you a good reproduction, with the smallest file size.

    BMP = Bitmap image
    TIFF = Tagged Image File Format
    JPEG = Joint Photographic Experts Group
    PNG = Portable Network Graphics
    GIF = Graphic Interchange Format (this was the first compressed format, used by Compuserve, if any of you go back that far. How many remember paying for access by the minute, according to your modem speed?)