Scanning Images

 

NB: Basically there are two kinds of scanning: scanning pictures and scanning text. It is important that

you understand that there is difference.

 

Scanning Pictures

 

Click SCAN and then click Save As…

You will need to tell the computer three things:

Scanning pictures is easier than scanning text.

Quite simply a scanner takes a picture of what’s on

the scanner bed, very much like a copy machine

does. A scanner translates the image into an

electronic file. That file can be used on a web page,

in a word processing document, sent with an email,

or just for printing.

1.

Where you want to save the file,

2.

What you want to name the file, and

3.

What format you want the file to be.

 

Procedure

:

 

Log on

to the network before proceeding.

 

Place the document to be scanned face down on the

scanning bed. Make sure that it’s flat or the image

will be distorted.

 

Open the scanning software.

 

Click on the preview button

.

 

 

This process will scan the entire page. Often we do

not want the entire page just part of it.

Where to save

: Your home directory (the one with

your last name and first initial) on the server is the

best place to save these picture files.

 

The next step is to “outline” the desired area. After

the scanned image appears you will see a + on the

screen and moving your mouse should move the +.

Place that + just

above

and to the

left

of the image

you wish to capture. Holding down the mouse

button drag the + to the lower right corner of the

image you wish to capture. A dotted rectangle

should appear around this image.

 

Name

: You may call the file anything you like but

the name should not include any punctuation—no

periods, commas, slashes, etc.

 

Format

: GIF and JPG both work great for sending

via email, placing on a web page, or importing into

HyperStudio or AppleWorks. TIFF files are okay

but are large and cannot be read by just any

computer.

 

Adjusting the outline: Using the mouse point to the

right side of the rectangle until it looks like an

double pointed arrow (

↔

), click and hold the

mouse button down then move that edge just to the

right of the desired portion. Adjust the left (

↔

),

top (

↕

) and bottom (

↕

) sides until the dotted

rectangle contains only desired area. You can click

on the

button to zoom in on the rectangular

region for finer adjustments.

 

Clicking Save at this point will scan the portion of

the image that you have outlined and save with the

name that you gave it.

 

See reverse for more tips on images and computers.

 

 

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Pictures and Files

 

The size of an electronic image is a very important

element in good scanning. Files that are too large

are difficult to work with. Large files can take

forever to download from email or the Internet.

Files that are too small are often too grainy to look

at.

 

There are three elements that effect the size of the

picture file. They are the size of the item to be

scanned, the format of the saved image and the

resolution or number of dots­per­inch that you

choose when you scan.

 

You really can’t do much about the size of the

image to be scanned but you can control the file

format and number of Dots Per Inch—DPI.

 

The larger the dpi the larger the file. 72 or 144 dpi

is best for placing pictures on web pages and

sending email but pictures scanned at 72 dpi can

look grainy.

 

You can scan up to 1200 dpi but that will create a

very large file that will take a long time to move on

the Internet or email. 1200 dpi files (unless from

tiny pictures) cannot be imported into AppleWorks

or HyperStudio.

 

You can change the dots per inch by clicking on

Tools

menu and then clicking

Resolution

. This will

but a box on the tool bar that will allow you do

adjust the dpi.

 

The file formats of JPG and GIF are usually the

smallest. With TIF (TIFF) being the largest. The

same picture scanned at the same dpi can be ten

times larger in TIF then in JPG.

 

At the bottom of the scan window there is an

indicator of the size of the file. Files going out on

the Internet should be kept under 200k. Files larger

that 1,000k (1.0 M) can take a long time to down

load from a home computer using a dial up line and

should be avoided if possible.