B.4.4.2 Brightness - Image Access WideTEK A2 Operation Manual

B.4.4.2 Brightness
Value range from 0 (zero) to 255.
The brightness function sets the brightness level of the scanned image.
Click on the slider bar to change the brightness setting or enter a numeric value into the
field beside the slider.
B.4.4.3 Contrast
Value range from 0 (zero) to 255.
The contrast function sets the contrast level of the scanned image.
Click on the slider bar to change the contrast setting or enter a numeric value into the field
beside the slider.
B.4.4.4 Exposure
Value range from 0 (zero) to 100.
Sets the threshold value for the black cut function or for the auto exposure function.
No Function disabled.
When Black Cut or Auto is selected an additional slider is displayed.
Black Cut Sets the threshold for black. All pixel values found in the image below
the selected value are set to black.
0 (zero) to 100
Result: The image contrast is improved.
Sets the threshold for black and activates the automatic exposure
Auto
control.
0 (zero) to 100
These function searches the image for the highest and the lowest pixel
value. The highest pixel value is defined as "white". Is the lowest pixel
value higher than the threshold it is defined as "black". Otherwise all
values below the threshold are defined as "black".
Result: Automatic contrast control and the image contrast is improved.
Operation Manual
Picture 52: Black Threshold slider
Page 53