Table of Contents
Advertisement
Continued from the preceding page
(8) Operation on the [BIN.AREA SET] menu screen (setting an image for binary conversion)
5THRESHOLD VALUE U.LM 255 L.LM 100(0~255)
1
1. Move the cursor to 5 THRESHOLD VALUE (threshold value) and press the SET key.
2. Move the cursor to L.LM (lower limit) with the left and right keys, and adjust the lower limit
threshold value with the up and down keys.
(Adjustment of threshold value)
An example of adjustment is shown below, using a white object on a black background. When
the dotted line in the window is converted to a binary image, if the lower limit is set higher, the
black part in the binary image will become larger. If the lower limit is set lower, the white part
will become larger. Increase and decrease the lower limit value, find the value at which the
white part in the binary image starts growing and the value at which the black part starts
growing. Then set the lower limit at the value halfway between these points. This will ensure
reliable operation.
White
Inspection image
3. After setting the lower limit, press the SET key.
4. Move the cursor to q UPPER MENU and press the SET key.
- The screen will return to the [MEASURING COND] (measurement conditions) menu.
5. On the [MEASURING COND] menu, move the cursor to 3 UPPER MENU and press the
SET key.
- The screen will return to the [TYPE00-MEAS1] (type: 00, measurement: 1) menu.
Continued on the following page
Operation Examples (Area measurement by binary conversion)
2
Black
255
White
0
Horizontal coordinate
of the dotted line
Changing the lower limit threshold value
*
If the stable range in the lower limit threshold
value is less than 20, (actual measurement)
measurement errors may occur.
3-5
The size of the white area changes
depending on the threshold value setting.
As the value increases,
the black part grows larger.
*
Stable range
As the value decreases,
the white part grows larger.
3
Advertisement
Table of Contents
