# Measurement and Analysis

The Measurement and Analysis tool used to measure and straighten images. On the toolbar there are some important icons:

<figure><img src="/files/L8fWbA3V5rTrz8VSE47V" alt=""><figcaption><p>Region, line, measure buttons.</p></figcaption></figure>

In this image, the first icon is selected, which is the Region tool. The next icon is the line tool. Rather than drawing a region (box, or region of interest), this will draw a line on the image. The right-most icon will display the Measurement and Analysis tool window.

<div align="left"><figure><img src="/files/lGJIDrWaayoobRCCpwoB" alt="The Measurement and Analysis window."><figcaption><p>The Measurement and Analysis window.</p></figcaption></figure></div>

**Region**\
The four edit boxes contain the coordinates of the currently selection region (region of interest). The width, height and aspect ratio (A/R) of the region are also displayed.

**Line**\
When a line is drawn on the image, the length and logical length are calculated. In addition, the angle of the line and length in pixels are also displayed.

<div align="left"><figure><img src="/files/uAiACNlBoLA6fyni13B2" alt=""><figcaption></figcaption></figure></div>

When a line is defined, you can click this button to straighten the image based on the angle of the line.

<div align="left"><figure><img src="/files/njWaICjCe0b3PDVUtNZC" alt=""><figcaption></figcaption></figure></div>

Click this button to change the color of the line.

**Example**

As an example, image that you know that 1 pixel in your image is equivalent to 2mm. You can set the measurement to 'mm' and the Logical length to 2.000. Then, as you draw a line on the image, you can see the measurement in mm. In the example below, the Length (pixels) is 75.0, and therefore our measurement is 150.00mm.

<div align="left"><figure><img src="/files/gMziOf0gFzJBdzUj7adH" alt="Measurement example."><figcaption><p>Measurement example.</p></figcaption></figure></div>


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