National Instruments NI 1712 User Manual - page 49

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5-5

NI 17xx User Manual

Inverse binarization reverses the assigned bit numbers of the particle region and the background 

region. All pixels that belong in the threshold interval, or the particle region, are set to black, and 

all pixels outside the threshold interval, or the background region, are set to the image white value.

Figure 5-5 illustrates binarization and inverse binarization.

Figure 5-5.  

Binarization and Inverse Binarization

You can enable hardware binarization in the following ways:

•

In Vision Builder AI, configure the 

Lookup Table

 attribute on the 

Advanced 

tab of the 

Acquire Image (Smart Camera)

 step. Refer to the 

NI Vision Builder for Automated 

Inspection: Configuration Help

 for more information.

•

In MAX, use the 

Lookup Table

 drop-down box on the 

LUT 

tab of the smart camera 

configuration page to enable hardware binarization. Refer to the 

Measurement & 

Automation Explorer Help for NI-IMAQ

 for more information.

Maintenance

Do not touch the CCD sensor by hand or with other objects. The sensor can be damaged by 

electrostatic discharge (ESD), body oils, and particulate matter.

Use a lens mount cover whenever a lens is not mounted on the camera to protect the sensor from 

dust and dirt.

Avoid drastic temperature changes to prevent dew condensation.

When necessary, use the following procedure to clean the sensor at a workstation equipped with 

anti-ESD facilities. If dust sticks to the CCD, first attempt to blow it off from the side of the 

sensor using ionized air. If oils are present on the sensor, clean the sensor with a cotton bud and 

ethyl alcohol. Be careful not to scratch the glass. Use only one pass over the glass per cotton bud 

to minimize the risk of recontamination and scratching.

NORMAL

Stored V

alue

Sampled Data

INVERSE

Stored V

alue

Sampled Data