Stretch Histogram

Command

Image
Stretch Histogram

Description

Allows to optimize contrast by selecting a lower and upper threshold value.

Dialog box

The dialog box displays a histogram of graylevels. The upper and lower threshold values are represented by vertical red lines.

You drag the red lines to the required threshold values.

• pixels with a gray value less than the lower threshold value will be black.
• pixels with a gray value higher than the upper threshold value will be white.
• the gray values between the two threshold values will be stretched over the full range of possible gray values.

Click Preview to judge the results.

Click OK to proceed.

Example

Before:		After: