Chapter 6 Scanning 6-25ScanningWhen you adjust the midpoint, all tones in the image between the black-point and the white-point are adjusted to the selected mid-point.When you adjust the white-point, all tones in the image lighter than theselected white-point are adjusted to white.When you find a combination of tone settings you like, you can save thesettings in a file and use it in future scanning sessions.To adjust the tones using the Histogram tool:1. On the Tone tab, click the Histogram tool button.2. If you are working with a colour image, select the appropriate colourchannel.3. For the black-point, midpoint, or white-point, do one of the followingto make a change:z Click the appropriately labelled button. Then click on the portionof the image in the preview area that is darkest (for black-point),lightest (for white-point), or in the middle of the tonal range (formidpoint). Try zooming in on the specific part of the image so youcan be sure you are selecting the shade you want.z In the appropriately labelled box, enter a tone value.z Drag the appropriate arrow at the bottom of the histogram to thelevel you want.In the preview image, all tones are adjusted accordingly.To reset to the default values:Click Reset.To save these settings to use on similar images:1. Click Save.2. In the Save As dialog box, specify the file name and location whereyou want to save the setting, and click Save.
