Rockwell Automation 5370-CVIM2 Module - Manual (Page 440)

8 Chapter
8–1
Thresholds, Filters, and Morphology
This chapter discusses the various threshold and filter settings for the
inspection tools, as follows:
•
Binary thresholds: Gaging tools –– These settings adjust the edge
detection parameters of gaging tools (gages and reference lines) operating
in the binary gaging mode.
•
Binary filter: Gaging tools –– This function provides several degrees of
filtering that can remove or reduce “noise” from the image for gaging
tools that are operating in the binary gaging mode.
•
Kernel and threshold –– These settings adjust the edge detection
parameters of gaging tools operating in the gray scale gaging mode.
•
Thresholds and Morphology: Area tools –– Threshold settings define
the separation between black and white in windows that are configured
for any of the binary area tool (window and image tool) operations.
Morphology is an image processing function that provides refinement of
the raw camera image. It can be used to enhance both binary and gray
scale images.
Numerical parameters such as thresholds are adjusted by a “slide bar.”
Settings are indicated by the visual positions of one or two cursor symbols,
and by numbers appearing in boxes near the cursors. The specific function of
each cursor depends on the specific parameter it represents. Figure 8.1 shows
how two cursors and their associated “slide bar” typically appear on the
display.
Figure 8.1 Typical Threshold–Setting Cursors and Slide Bar
Current “Low”
threshold value
Cursor
Slide
Bar
Current “High”
threshold value
Cursor