Epson Expression 800 User Manual - TWAIN 32 - Page 46
Setting the Densitometer Measuring Point, Adjusting Image Quality,
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Before setting the densitometer measuring point, make sure you're in pixel view (the button appears in the rotation tools bar). If you not in pixel view, click the button. Setting the Densitometer Measuring Point You can fix the densitometer measurement point to a specific location on an image to get its color values and accurately adjust the tone curve based on those values. 1 Move the mouse pointer to the point on the image you want to mark for measurement. 2 Hold down the Shift key and click the image. A red cross appears at that point on the image and remains there until you press the Shift key while clicking the image again. 3 Now open the Gradation Curves dialog box (see Adjusting Tone Curves for details). The red, green, and blue curve anchors indicate the settings for those colors at the densitometer measuring point. Enter new values for the colors you want to adjust based on the current densitometer values. Adjusting Image Quality Page 46