Microtek 3700 User Guide

The Tone Curve tool lets you adjust the tonal range of an image. However, 

instead of making adjustments using just three variables (highlights, 

shadows, and midtones), you can adjust any point along the 0-to-255 scale 

(for 8-bit images; 0-to 4096 scale for 12-bit images). The Tone Curve tool 

applies to grayscale and all color images and is not available for line art or 

halftone scan modes.

Click either one of thumbnails below to obtain a larger view.

 

 

 

 

 

The Curve shows the relationship of the brightness 

changes across the middle pixels between the 

resulting image and the original. When you open 

the Curves dialog box, the line on the graph is 

diagonal because the Input and Output values are 

the same.

When the curve is moved up or down, the 

relationship between input value and output value 

changes accordingly.

●

     

In areas where the curve is moved down, 

pixels in that portion of the image are 

darkened.

●

     

In areas where the curve is moved up, 

pixels in that portion of the image are 

lightened.