Adjusting Image Quality - Basler Pioneer User Manual

Software and Hardware Installation

2.5 Adjusting Image Quality

In the following descriptions, we will discuss image quality in terms of focus, depth of focus,
brightness and contrast. You can adjust image quality with regard to these criteria by choosing
appropriate settings. However, the "best" image quality will partly depend on the specific
requirements of your application and therefore no generally applicable "best" setting can be
recommended.
The adjustments will involve the following:
adjusting the brightness of the illumination
adjusting the focus
setting the lens aperture
setting the black level
setting the shutter
setting the gain
adjusting white balance.
In addition, the quality of an image will be affected by other factors, e.g., by the choice of the lens.
We recommend carrying out all fine adjustments using the illumination that you want to use in your
actual application.
Focus:
You will obtain a focused image only if the lens is screwed into the lens adapter of the camera as
far as it will go and if the glass surfaces are clean. The object to be imaged must be within the range
of focus of the lens.
You can obtain a focused image by turning the focal ring on the lens.
Depth of Focus:
If the objects you want to image are located at different distances from the camera, you must
consider depth of focus. The depth of focus must be sufficiently deep to allow all objects to appear
focused in the image.
You can change the depth of focus by turning the aperture ring on the lens. Closing the lens
aperture (turning the aperture ring to higher f-numbers) increases the depth of focus and vice
versa.
Note that closing the aperture decreases the amount of light reaching the camera's sensor and
therefore results in a darker image.
46 Basler pioneer