DMT Presenter Control Bedienungsanleitung PDF herunterladen (Seite 29)

3.3.2.1 Displaying Images

The real time frame-grabbing mode may be switched on or off by means of the

“start/stop display” button or from the pop-up menu activated (click on )

from the control bar. The same action is also available by selecting the “start/stop

image display” icon on the tool bar. The rate at which frames are displayed in the

interface depends upon the size of the control bar and whether frames are also being

displayed in the main window.

3.3.2.2 Image Calibration

The image dimensional analysis can be calibrated in sensible units (e.g. microns) but

the default calibration is performed in units dened by the image data resolution (i.e.

pixels). To perform this calibration the user is referred to How To... Calibrate the Image

Analysis in 3.3.4.2.

3.3.2.3 Zooming

The zoom feature can be used to focus on a region of interest. Zooming does not

affect the image analysis but can be useful in determining a suitable region for

analysis. Zooming can be performed before or during analysis without affecting

any other feature that may be active. Before selecting a region to zoom in on, the

image should be displayed in the main window. Drag and click the mouse to select a

rectangle in the main window and then select the “zoom in” icon on the tool bar.

Selecting the “full size” icon restores the full image .

3.3.2.4 Saving an Image

Images can be saved to disc in a standard format (.bmp) for future reference or

incorporation into documents. Images can be saved even when being acquired and

displayed in real time, which allows the user any time to “catch” an interesting event.

Sometimes such an image may be required during the setup phase of an experiment.

In this case it is recommended to stop the frame grabber when a suitable image is

acquired. To save this “freeze frame” to le, click on the “save image” icon on the

tool bar. A dialogue box will appear to allow the user to dene a le name and location

for the saved image. A le extension (.bmp) will be added automatically to enable

other applications (ofce and drawing packages) to recognise the le format.

3.3.2.5 Frame Grabber Conguration

Attributes (gain, offset, saturation) of the frame grabber can be controlled from

VediView

™

via the "frame grabber conguration" dialogue box. Access to these

controls is available by clicking on the "congure frame grabber" icon in the tool

bar. Please refer to the PICOLO technical data for an explanation of these controls.

Images obtained under normal conditions will not require adjustment of these

controls and the majority of users will achieve optimum performance from the default

settings.

User Manual vers. 1.4 Chapter 3

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DMT Presenter Control Bedienungsanleitung Seite 29