Image Quality Problems - Basler Vision Technologies A202k User Manual

Troubleshooting

6.2.2 Image Quality Problems

Use this chart if the image is completely white, if the image is completely black, or if you have other
image quality problems. If you get no image at all when you attempt to capture an image with the
frame grabber, use the chart that appears in Section 6.2.1.
Use the Camera Configuration Tool Plus to set the camera for test image one. Use your
frame grabber to capture an image and examine the image carefully. (Most frame
grabbers include software tools that allow you to see the individual values of each pixel
in the image and histograms that display distributions of the pixel values in the image.)
The pixel values in your captured test image should be exactly as described in Section
3.11. Also, if you capture several test images, the pixel values should be the same in
Use the Camera menu on the configuration tool to copy
the Factory Set to the Work Set. Take the camera out of
test image mode and capture a normal image.
Images are too
bright or too dark.
Do the following:
Make sure that the lens cap has
been removed.
Check the lens aperture. If the
images are too dark, try opening the
aperture. Try closing the aperture if
they are too bright.
Check the exposure time. If the
images are too dark try increasing
the exposure. Try decreasing the
exposure if they are too bright.
Check your light source. If the
images are too dark, try increasing
your light intensity. Try decreasing
the intensity if they are too bright.
Check your gain setting. If the
images are too dark, try increasing
the gain. Try decreasing the gain if
they are too bright.
Has the problem been corrected?
Yes
No
Exit this chart.
Contact Basler technical support. The contact numbers appear on the title page of this manual.
Before you call for support, be sure to make note of the camera settings and the frame grabber settings you are
using. You should also have a captured live image and a captured test image available. Technical support will
6-4
DRAFT
all of the captured test images.
Are the test images OK?
Yes
Is the problem still present?
Yes
Images look noisy.
Do the following:
Make sure that you are using a DC
light source. Using an AC light
source can make images appear
noisy.
Make sure that the camera has
proper ventilation. If the camera
becomes extremely hot, it may
produce noisy images.
Check the exposure time. If you use
an extremely long exposure time,
the images can become noisy.
Check your gain setting. Using a
very low or a very high gain setting
can cause noisy images.
Examine the objects that you are
imaging. Objects with
characteristics such as changing
surface texture or reflectance will
produce images that appear noisy.
Has the problem been corrected?
Yes
Exit this chart.
frequently request that you e-mail copies of these captured images.
No
One of the camera's settings was
significantly misadjusted. Review the
No
camera manual to make sure that you
are setting the camera correctly.
Images have a
color problem.
Do the following:
If most colors look OK but some
colors look odd or muddy, try
using an IR cut filter. (This only
applies to cameras with F-mount
lens adapters. Cameras with C-
mount lens adapters have a built-
in IR cut filter.)
If colors appear to be swapped
(for example, things that should
be red are green), check the x-
offset and y-offset settings on
your frame grabber.
Has the problem been corrected?
Yes
Exit this chart.
No
Go to the interfacing
troubleshooting chart.
Other image
problems.
No
BASLER A202
k