Adjusting Color Mode and Output (Scan) Resolution (5600F, LiDE 100, LiDE 200)
Article ID: ART102201 | Date published: 05/11/2015 | Date last updated: 09/17/2019
 

Description

This article provides information on adjusting the color mode and the scan resolution of your scanner when using the scanner driver (ScanGear).

 

Solution

Adjusting Color Mode and Output (Scan) Resolution (5600F, LiDE 100, LiDE 200)

Color Mode and Output (Scan) Resolution are key areas that can affect the scan quality.

Color Mode
This setting determines whether the scanned image is reproduced as a Color, Color (48bit), Grayscale, Grayscale (16bit), Black and White.

Select a Color Mode that corresponds to the scanned item and the purpose to which the scanned image will be applied.

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Explanation of Color Mode Options

Color Select this mode to scan color documents or film, or to create color images. This mode renders the image in 256 levels (8 bit) of R(ed), G(reen), and B(lue).
Color (48bit) Select this mode to scan color photos or film. This mode renders the image in 65536 levels (16 bit) of R(ed), G(reen), and B(lue).
Grayscale Select this mode to scan black and white photos or film, or to create black and white images. This mode renders the image in 256 levels (8 bit) of black and white.
Grayscale(16bit)* Select this mode to scan film* in black and white. This mode renders the image in 65536 levels (16 bit) of black and white.
Black and White Select this mode to scan photos and documents in black and white. This mode renders the image in black and white. The contrast in the image is divided at certain levels (threshold level) into black and white and is rendered in two colors. The threshold level can be set with (Threshold).
 
  • Some applications cannot display images scanned in Color(48bit) or Grayscale(16bit).

  • Color(48bit) and Grayscale(16bit) are displayed only when the Enable 48/16 bit Output is selected on the Scan tab of the Preferences dialog box.

* Only applies to film supported models.

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Output (Scan) Resolution
Select the resolution to scan at.
The higher the resolution (value), the more detail in your image.
Select a resolution from the options displayed by clicking the button, or enter a value within the range of 25 dpi to 19200 dpi (in 1 dpi increments).

The following resolution presets are available: 50 dpi, 75 dpi, 100 dpi, 150 dpi, 200 dpi, 300 dpi, 400 dpi, 600 dpi, 800 dpi,1200 dpi.

Click Here for more information about 'Determining the Best Scan Resolution Settings'.

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Determining the Best Scan Resolution Settings

The data in the image you have scanned is a collection of dots carrying information about brightness and color. The density of these dots is called "resolution", and "dpi" (dots per inch) refers to the number of dots in one inch. Resolution will determine the amount of detail your image contains. The higher the resolution (number), the more detail in your image; the lower the resolution (number), the less detail. As a general rule, you should select a scanning resolution that corresponds to your final output device such as a monitor or printer.

To determine the best scan resolution for your project, the following categories will be helpful.
Images for Displaying on a Monitor
Images For Printing
Printing to Scale
Resolution and Data Size

You can specify the desired scanning resolution within the scanner driver.

 

 

Images for display on a monitor

Images for display on a monitor should in general be scanned at a resolution of 75 dpi.

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Images for printing

Images to be printed should be scanned at a resolution which corresponds to the resolution of the printer. For example, if you are using a 600 dpi black and white printer, you should scan your document at 600 dpi.
With a color printer, the colors are expressed as a certain percentage of ink pigment so scanning your document at half the resolution of the printer should be fine. For example, if you are using a 600 dpi color printer, you should scan your document at 300 dpi.

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Printing to scale

For example, if you want to print a document which is twice the size vertically and horizontally, the resolution of your document will be reduced by half. If the resolution of the original document is 300 dpi, the resolution of the enlarged document will be 150 dpi. If you print the document with a 600 dpi color printer, the lack of detail in the image may be obvious. In such a case, if you scan at a resolution of 600 dpi, resolution will be 300 dpi even if you double the size of the document and you can print the document with sufficient quality. Conversely, if you want to print a document at a reduced size, it should be sufficient to scan at half the resolution.

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Resolution and data size

If you double the resolution, the image data will be four times greater. If the data is too large, processing speed will slow down significantly, and you may experience malfunctions such as lack of memory. Make sure the resolution corresponds to the purpose of use of the image and set at the lowest level possible.

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