A short tutorial about scanning might be useful in helping to
avoid uploading huge, uncropped, scanned images that take a long
time to view and/or download. Although this author is no expert,
some tips can be offered from personal experience. The most
important thing about preparing images for uploading on the
internet is reducing the file size while keeping the image
Reportedly 30 kilobytes take about 10 seconds of download time, so
if you have a 300 kilobyte image it would take a minute to be able
to view, which in our fast moving world can seem like an eternity.
If there are several windows open on the computer, it can take
In the author's experience, an image size as close to 100kb or
less is ideal, when the image is just for viewing and not to be
used in a graphics program.
There are several ways to reduce the image size. The
first one is to scan images at 72-100 dpi if the image is only for
Another way to reduce file size is to make good use of photo
editing software that comes with the scanner or with Windows.
Third party software such as Paint Shop Pro, Photo Deluxe and
Picture it! are also excellent.
First crop unwanted white areas around your images which use up
precious kb space. The next thing is to resize/resample the image.
Make sure to view the image in real size first, so go to view and
click on view at 1:1. Now resize slowly and if the image is too
small than go to edit and undo. If your program lets you resize in
percentage than shrink down in 10-20% increments until you get the
desired size. Usually if the image is slightly smaller than your
computer screen than it will be okay to upload. Don't make the
image so small you have to squint to even see the image. The last
thing you would do is check the file size and if its still way
over 100-150kb than you may have to try to reduce the number of
There are 2 image formats used on the internet. Jpeg, which is
a format that compresses images by deleting some pixels in the
image, has to have 16 million colors, so really looks brilliant
and is very popular. Gif is a format that compresses images but
does not eliminate as many pixels as jpegs, but uses 256 colors or
less. So if you reduce the number of colors you will have to save
the image as a GIF. Zoom in on your image and slowly reduce the
number of colors. Keep reducing colors slowly, as long as there is
no effect on the colors you see on the screen. As soon as you see
the colors change drastically, that's a signal that you went one
step too far so then go to edit and undo. That should be your
finished image--72-100 dip, slightly smaller than screen size,
white areas the image cropped and if necessary, colors reduced as
long as they don't affect the colors seen on the screen. The
resulting image should be no larger than 100-150 kb.
Some helpful links: