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


Making image adjustments


Overview: Adjusting images
Adjusting images

There are two pages that you can use to make adjustments to your image:

Color Page

The Color page lets you modify the color, brightness, and contrast of the scanned image. Changes to the settings affect both the final scan and preview image.

The Red, Green, and Blue slider bars allow you to adjust the percentages of color added to an image during a scan. The Brightness slider bar allows you lighten or darken an image. The Contrast slider bar lets you adjust the balance of shadows and highlights in the scan.

Adjust Page

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

The Velocity slider bar lets you adjust the speed of the scanning head. Lower speeds produce higher quality images, but take longer to complete. The Shadow and Highlight slider bars let you adjust the balance of shadow and highlights in the image.

The Grain slider lets you adjust the sharpness of an image. In line art, continuos tones are produced by dots known as halftone cells. The Grain setting controls the number of dots used to produce tones in the image. Higher values use more dots to create tones, which produce sharper images


Adjusting contrast and brightness

1.	Choose the Color page.

2.	Set the Contrast and Brightness sliders to the desired values. The greater the number, the greater the effect. Contrast should be increased about one tenth the amount you increase brightness.

3.	Click Prescan to see the result of your changes.

 Related Topics


Adjusting colors

1.	Choose the Color page.

2.	Set the Red, Green and Blue sliders to the desired values.

3.	Click Prescan to see the result of your changes.

 Related Topics


Adjusting scanning speed

1.	Choose the Adjust page.

2.	Set the Velocity sliders to the desired value. Higher values produce sharper images.

3.	Click Prescan to see the result of your changes.

 Related Topics


Adjusting halftone grain

1.	Choose the Adjust page.

2.	Set the Grain slider to the desired value. Lower values produce sharper images.

3.	Click Prescan to see the result of your changes.

 Related Topics


Darkening shadows

1.	Choose the Adjust page.

2.	Set the Shadow slider to the desired values. This control will only affect dark areas of the image.

3.	Click Prescan to see the result of your changes.

 Related Topics


Lightening highlights

1.	Choose the Adjust page.

2.	Set the Highlight slider to the desired values. This control will only affect light areas of the image.

3.	Click Prescan to see the result of your changes.

 Related Topics


Color Page


Changes the amount of red that's added to the image during the scan.


Changes the amount of green that's added to the image during the scan.


Changes the amount of blue that's added to the image during the scan.


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 highlight and shadow in the image.


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


Sets 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.


Adjust Page


Changes the speed of the scanning head. If you're scanning a detailed image, use a slower scanning speed to ensure you get a high quality scanned image. Use lower speeds for simple images, to reduce scanning time.


Changes the darkness of shadows in an  image. Use this control in conjunction with the Highlight slider to fine-tune the contrast of an image.


Changes the brightness of highlights in an  image. Use this control in conjunction with the Shadow slider to fine-tune the contrast of an image.


Changes the sharpness of an image. In line art, continuos tones are produced by dots known as halftone cells. The Grain slider controls the number of dots used to produce tones in the image. Higher values use more dots to create tones, producing sharper images. Lower values use fewer dots to create tones, producing smoother images. This option only effects black and white images.


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.