A Procedure For Setting The Color Enhancements - Basler ace acA640-90gm User Manual

8.5.5

A Procedure for Setting the Color Enhancements

When setting the color enhancements on the camera, we recommend using the procedure outlined
below. Since it makes changing camera parameters quick and easy, we also recommend using the
Basler pylon Viewer software when you are making adjustments.
1. Arrange your camera so that it is viewing a scene similar to what it will view during actual oper-
ation. Make sure that the lighting for the scene is as close as possible to the actual lighting you
will be using during normal operation. (Using lighting that represents your normal operating
conditions is extremely important.)
2. We recommend including a standard color chart within your camera's field of view when you
are adjusting the color enhancements. This will make it much easier to know when the colors
are properly adjusted. One widely used chart is the ColorChecker® chart (also known as the
Macbeth chart).
3. To start, leave the Color Transformation Mode at the default setting.
4. Begin capturing images and check the basic image appearance. Set the exposure time and
gain so that you are acquiring good quality images. It is important to make sure that the images
are not over exposed. Over exposure can have a significant negative effect on the fidelity of
the color in the acquired images.
5. Adjust the white balance. An easy way to set the white balance is to use the "once" function on
the camera's Balance White Auto feature.
6. Set the gamma value. You should set the value to match the gamma on the monitor you are
using to view acquired images. When gamma is set correctly, there should be a smooth
transition from the lightest to the darkest gray scale targets on your color chart.
(The sRGB gamma preset will give you good results on most CRT or LCD monitors.)
7. The color fidelity should now be quite good. If you want to make additional changes, adjust the
hue and saturation by using the color adjustment feature. Keep in mind that when you adjust a
color, the colors on each side of it in the color hexagon will also be affected to some degree.
For example, when you adjust red, yellow and magenta will also be affected.
When you are making hue and saturation adjustments, it is a good idea to start by concentrating
on one line in the color chart. Once you have the colors in a line properly adjusted, you can
move on to each of the other lines in turn.
When you first start working with the color enhancement tools, it is easy to badly
misadjust the colors and not be able to bring them back into proper adjustment.
You can easily recover from this situation by using the camera's configuration sets.
Simply load the default configuration set into the active set. This will return all
settings to a point that will give you reasonable color fidelity.
Basler ace GigE
Color Creation and Enhancement
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