[Calibration Setting (Camera Image Input)]

By setting the calibration, the measurement result can be converted and output as actual dimensions. Select your calibration method.

There are three calibration methods as shown below.

Table: Calibration (Camera Image Input)
Item	Description	See
Point	Set up calibration by specifying any preferable points (in pixels).	Setting up by Specifying any Points (Point)
Parameter	Set up by inputting values directly.	Setting up calibration by entering values (Parameter)
Sampling	Set by sampling measurement.	Setting up Calibration by Sampling Measurement (Sampling)

You can check the contents of the set calibration data.

View Calibration Parameters

For calibration, see

User's Manual, "Terminology"

Note

When measurement results are to be output in actual dimension, set [Calibration] to "ON" in [Output parameter] for each unit. If [Calibration] is "OFF" (factory default), the coordinate values of the camera image are output as measurement results.

Setting up by Specifying any Points (Point)

This is a method to set calibration by specifying any points (in pixels).

The calibration parameter is calculated automatically when the actual coordinate of the specified location is entered. Up to 3 points can be specified.

When magnification is the same in X and Y directions
Specify only 2 points.
When magnification is not the same in X and Y directions
Specify 3 points.

Note

When 2 points are specified, the coordinate system is set to left-handed system (forward in the clockwise direction). Specify 3 points to perform calibration including the coordinate system.

In the "Item tab" area, tap [Calibration].
In the "Calibration setting" area, select "Point".

In the "Point" area, add a point coordinate pair.

Adding point coordinates

In the "Image display" area, tap a point whose position coordinates are to be added.
The added point coordinates and the corresponding actual coordinates are reflected on the Point List.
Coordinates for up to 3 points can be added.

Editing coordinates

Select coordinates you want to edit on the Point List, and tap [Edit].

In the Coordinate Setting window, tap [...] for "Point" and "Actual" and specify the X and Y coordinate values for each of them.

For how to input value, see

User's Manual, "Inputting a Value"

Table: Calibration Setting (Camera Image Input) - Point
Actual Coordinate	Set Value [Factory defaults]
Point coordinate X	0 to 99999.9999 [Point you tapped in the window]
Point coordinate Y	0 to 99999.9999 [Point you tapped in the window]
Actual coordinate X	-99999.9999 to 99999.9999 [0]
Actual coordinate Y	-99999.9999 to 99999.9999 [0]

Tap [OK].
The added point coordinates and the corresponding actual coordinates are reflected on the Point List.

Deleting Point Coordinates

Select the coordinates you want to delete on the Point List, and tap [Del].
A confirmation window is displayed.
Tap [OK].

Repeat the Step 3 to add point coordinates.
Tap [Generate calibration parameters].
Calibration parameters are generated.

For the subsequent operations, see

Setting up [Camera Image Input]

Setting up calibration by entering values (Parameter)

Directly enter values as calibration data.

In the "Item tab" area, tap [Calibration].
In the "Calibration setting" area, select "Parameter".
In the "Parameter" area, tap [] for "Coordinate" and select a coordinate system.
- Lefthand: Clockwise is forward when specifying the coordinate.
- Righthand: Counter-clockwise is forward when specifying the coordinate.
Tap [] for "Origin" and choose where to place the origin of the actual coordinates.
Tap [...] for "Magnification" and input a value of the actual size corresponding to one pixel.
Allowed range: 0.00001 to 9.99999
For how to input value, see User's Manual, "Inputting a Value"
Tap [Generate calibration parameters].
The calibration parameter will be generated.

For the following operations, see

Setting up [Camera Image Input]

Setting up Calibration by Sampling Measurement (Sampling)

This is a method to set calibration based on measurement result.

Actual coordinates can be obtained by registering the model and searching the specified measurement area. Calibration parameters are calculated automatically from the obtained actual coordinates.

In the "Item tab" area, tap [Calibration].
In the "Calibration setting" area, select "Sampling" .
In the "Sampling" area, tap [Regist model].
Register a model using the drawing tools.
User's Manual, "Setting Figures"
Set the search region as necessary.
1. In the "Sampling" area, tap [Search region].
2. Set search region using the Drawing Tools.
  The default is the entire screen.
  User's Manual, "Setting Figures"
Tap [Sampling measurement].
Measurement is performed.
The search result (cross-shaped cursor) is displayed in the "Image display" area, and the Sampling Coordinate window is displayed.
In the Sampling Coordinate window, tap [...] to enter the X and Y values.
For how to input value, see User's Manual, "Inputting a Value"
You can also use the arrow buttons to set the values.
Tap [OK].
Point coordinates and actual coordinates are registered in the sampling area.
Move the object to be measured and repeat the Steps 3 to 8.
Tap [Generate calibration parameters].
Calibration parameters are displayed.

View Calibration Parameters

View the set calibration data.

In the "Item tab" area, tap [Calibration].

In the "Calibration parameter" area, confirm the calibration data.

Calibration - Calibration parameter area

Table: Referenced Calibration Parameters
Item	Set Value [Factory defaults]	Description
A	Calculated value [1.000]	These are calibration conversion values. Camera coordinates are converted to actual coordinates based on these calibration conversion values. The conversion formulas to actual coordinates are as follows: (X, Y): Measurement point (camera coordinates), Unit: pix (X', Y'): Conversion point (actual coordinates) X'=A x X + B x Y + C Y'=D x X + E x Y + F
B	Calculated value [0.000]
C	Calculated value [0.000]
D	Calculated value [0.000]
E	Calculated value [1.000]
F	Calculated value [0.000]
Field of view	Calculated value [640]	This is an actual dimension in the X direction.