VWR avantor CHEMI Instruction Manual page 77

Note: Selected function buttons turn red. They stay red and the function remains active until the
function button is re-selected.
IMAGE SLIDER CONTROLS
The following controls are available to adjust the display of a captured image.
Zoom (digital) slider
Auto Levels (Reset)
Invert (Image Inversion)
The Zoom slider allows you to zoom in or out of the displayed image. Dragging the slider
towards the + sign zooms in, dragging the slider towards the - sign zooms out.
The Gamma slider changes the tone of the overall image. With reference to the histogram
mentioned previously, the Gamma function changes the relative brightness of the recorded
midrange tones by shifting them either towards the dark end or the white end of the graph,
without changing the extreme dark or extreme white values. This gives the recorded image an
overall darker or lighter appearance.
Contrast is a measure of how bright highlights are in an image. Brightness is a measure of how
bright shadows are in an image. Use the Contrast slider to control how bright the lightest
objects in an image are displayed. Use the Brightness slider to control how bright dark objects
in an image are displayed.
If you make changes using the sliders you can undo the changes by selecting the Auto Levels
icon.
Use the Invert button to invert the image, i.e. white appears black, black appears white. This
can help when making changes with the slider controls. Selecting the Invert button a second
time changes the image back to how it was originally.
CAPTURED IMAGE INFORMATION
Select the Image Information icon
image information. The information displayed is as follows:

Dye

Image capture date / time

Filter

Light

Exposure time

Iris f number

Image size

Range (range of grey scales captured)
76 vwr.com Instruction manual
button
button
IMAGE SLIDER CONTROLS
. This displays a pop-up window displaying captured
®
VWR
Gamma slider
Contrast / Brightness
sliders