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10: HOW TO USE A SCANNER | Photoshop

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There are two models of scanner in Lab A - CanoScan LiDE 25 and CanoScan LiDE 35 scannners.
You need to check which model of scanner you're using so that you can connect to it. The scanner model number is written on the top of the scanner - the lettering is quite small so you may need to look quite carefully.



If you are using the CanoScan LiDE 25 scanner (black lid) -

Scanner software is available through the application Adobe Photoshop.

• Move the mouse to the dock (generally at the bottom of the screen)
• Click the Adobe Photoshop icon to open Photoshop
• Photoshop will take a minute or so to open as it is a very big program and takes a short time to load up.
• Choose File > Import > CanoScan LiDE 25...
After a few seconds a new window should appear.
• Click Advanced Mode from the list of tabs so the layout is the same as screen shown below.

CanoScan LiDE 25

At first glance there are many different settings to choose from but the highlighted options above are the ones you mainly need to be aware of.

• Select Source: Platen
This tells the scanner to scan images that are placed on its glass surface.
So that your image is correctly orientated you should place it upside down at the lower left corner of the glass.

• Paper Size
This tells the scanner how large an area to scan. At present it is set to scan the whole glass surface but you could set it to scan different sizes eg A4 / A5 etc.

• Colour Mode
This option can be set according to the kind of media you are scanning.
(If you are scanning a colour photograph with the intention of converting it to grayscale you may find you get a more subtle tonal range by scanning in colour and then desaturating the image in Photoshop afterwards.)

• Output Resolution
Resolution refers to the amount of detail the scanner is able to capture from the image being scanned.
300dpi (dots per inch) is suitable for printed work while 72dpi is appropriate for images to go onto a website.

• Output Size
This refers to the size of the image when it is opened in Photoshop.
If your original image was A5 and you wanted to print it out at A4 you would scan your image at 200%

• Descreen
If you are scanning an image from a magazine or a book then set the DeScreen option to on to reduce the moiré effect of the dot pattern inherent within most images printed in magazines and books.

Click the Preview button to see a preview of the image in the scanning window.
If you only want to scan a small area within the preview area, click the marquee tool to set the rectangular are to be scanned near the top left of the window. This allows you to drag a selection box over the area of the image you want to scan.

• Click the Scan button to start scanning the image in the scanner.
When the scanner finishes scanning, your image will appear behind the scanning window.
Click the red button at the top left of the scanning window to return to Photoshop and work with your image.

Crop the image as required and save it into the student work folder of the computer.




If you are using the CanoScan LiDE 35 scanner (gray lid) -

Scanner software is available through the application Adobe Photoshop.

• Move the mouse to the dock (generally at the bottom of the screen)
• Click the Adobe Photoshop icon to open Photoshop
• Photoshop will take a minute or so to open as it is a very big program and takes a short time to load up.
• Choose File > Import > CanoScan LiDE 35...
After a few seconds a new window should appear.
• If you are in Simple Mode click the 'Advanced' button so the layout is the same as the screen shown below.


CanoScan LiDE 35

• Select Source: Platen
This tells the scanner to scan images that are placed on its glass surface.
So that your image is correctly orientated you should place it upside down at the lower left corner of the glass.

• Colour Mode
This option can be set according to the kind of media you are scanning.
(If you are scanning a colour photograph with the intention of converting it to grayscale you may find you get a more subtle tonal range by scanning in colour and then desaturating the image in Photoshop afterwards.)

• Output Resolution
Resolution refers to the amount of detail the scanner is able to capture from the image being scanned.
300dpi (dots per inch) is suitable for printed work while 72dpi is appropriate for images to go onto a website.

• Paper Size
This tells the scanner how large an area to scan. At present it is set to scan the whole glass surface but you could set it to scan different sizes eg A4 / A5 etc.

• Print Size
This refers to the size of the image when it is opened in Photoshop.
If your original image was A5 and you wanted to print it out at A4 you would scan your image at 200%


Click the 'Settings' tab

Settings


• Descreen

If you are scanning an image from a magazine or a book then set the DeScreen option to on to reduce the moiré effect of the dot pattern inherent within most images printed in magazines and books.

Click the Preview button to see a preview of the image in the scanning window.

Preview

If you only want to scan a small area within the preview area, click the marquee tool to set the rectangular are to be scanned near the top left of the window. This allows you to drag a selection box over the area of the image you want to scan.

• Click the Scan button to start scanning the image in the scanner.

Scan

When the scanner finishes scanning, your image will appear behind the scanning window.
Click the red button at the top left of the scanning window to return to Photoshop and work with your image.

Crop the image as required and save it into the student work folder of the computer.
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