Copyright: © 1995-1996 Corel Corporation. All rights reserved.
Citation: © 1995-1996 Corel Corporation. All rights reserved.


Adjust Page


Changes the brightness of the scanned image. If you find that a scanned image is too dark or too light, you can change the brightness to balance the final image.


Changes the balance of highlights and shadows in the image.


Determines the minimum amount of color that a dot must have to be defined as black. When a dot from an image is scanned, it is compared to the threshold value to determines whether it is black or white.

Increasing the value of the threshold causes Corel TWAIN to assign more dots to black. Reducing the threshold causes Corel TWAIN to assign more dots to white. The Threshold slider bar only affects black and white line art images. It has no effect on scans with any other color settings.


Defines the gamma pattern to be used when converting black and white images to halftones. Your scanner comes with several built-in curves designed to enhance different types of images. You may want to try scanning with several different curves to see which provides the best results.


Returns all the slider bars to their original positions of 128.


Sets all the slider bars to their last stored positions. The positions of the slider bars are stored each time you exit from Corel TWAIN.


Making image adjustments


Overview: Adjusting images
Adjusting images

The Image page lets you modify the parameters for scanning images. Changes to these settings affect both the scan and preview image.

The Threshold setting defines the minimum amount of color a scanned dot must have before Corel TWAIN considers it to be black. Increasing the value of the threshold causes Corel TWAIN to assign more dots to the color black. Reducing the threshold causes Corel TWAIN to assign more dots to the color white.

The Brightness slider bar lets you lighten or darken a scanned image. The Contrast slider bar lets you adjust the balance of shadow and highlights in the image. The Gamma control lets you select a of color correction scheme to apply to the image during a scan.

Default restores the sliders to their default values of 128 and Restore to resets all of the slider bars to their last stored positions. The positions of the slider bars are stored each time you exit from Corel TWAIN.


Adjusting the threshold

1.	Choose the Adjust page.

2.	Set the Threshold slider to the desired value.

 Tip

•	To see the result of your changes, click Prescan

 Note

•	This setting has no effect on color images.

 Related Topics


Adjusting contrast and brightness

1.	Choose the Adjust page.

2.	Set the Halftone Brightness and Contrast sliders to the desired values.

 Tip

•	To see the result of your changes, click Prescan.

 Related Topics


Selecting a color correction scheme

1.	Choose the Adjust page.

2.	Select a gamma curve value using the Gamma setting. Different gamma curves are useful for correct different types of color discrepancies. Experiment with different curves to see which provides the best results.

 Related Topics