Improving The Image Quality Of Metallic And Other Shiny Surfaces - Omron FQ2-S4 User Manual

Important
The lower the shutter speed/gain and brightness settings are, the darker the image becomes. If the Sensor is
used in a dark environment, make sure that the darkness of the image does not cause the measurements to be
unstable.

Improving the Image Quality of Metallic and other Shiny Surfaces

When objects with shiny surfaces are being measured, the lighting may be reflected off the surface and affect
the image.
To remove reflections, one of the following two functions can be used.
Function
HDR (High Dynamic Range) If objects have contrasting light and dark areas, the dynamic range can be made wider to
improve the quality of the images.
Polarizing filter (for Sensors Specular reflections can be eliminated from an image by attaching a polarizing filter to the
with Built-in Lighting) Sensor.
If the measurement object must be moving, use a polarizing filter. Also, if reflections can-
not be sufficiently removed by using the HDR function, use a polarizing filter as well.
HDR Function
The HDR function is used for objects that have a large difference between light and dark areas. For this kind of
object, clear images cannot be achieved with the standard brightness setting. The HDR function combines
several images of different brightnesses (shutter speed) so that the resulting image has a lower degree of
contrast and can be measured stably for the desired characteristic.
Inputting Images with a Limit Range of Brightness
Observe the following precautions.
• Use the HDR function only for objects that are not moving to avoid image blurring.
Several images are taken with different shutter speeds and combined. If the object moves while the image
is being taken, the image will become blurred.
• Images with different brightnesses are combined, so the resulting image will have a lower degree of con-
trast.
[Image] − [Camera setup]
1
] − [HDR] on the right side of the display.
Press [
2
Set the best level for the HDR Mode.
As shown below, the higher the level, the wider the combined dy-
namic range will be.
Level 1
Level 2
Level 3
Level 4
Dark
FQ2-S4 User's Manual
Description
Combining Images to Create an Image
with a Wide Dynamic Range
Bright
Bright
Dark
Adjusting Image Quality
65