Trapezoidal CorrectionFH/FZ5 Processing Item Function Reference Manual
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Compensate image
Trapezoidal Correction
If measurement is performed with the measurement object tilted or the camera tilted, the input image is
converted to orthogonal coordinates.
Used in the Following Case
• Processing a trapezoidal image shot tilted to make it easier to inspect
Conversion Method (Trapezoidal Correction)
Set the input image conversion method.
1 In the Item Tab area, click [Conv. method].
When making a new setting, you do not need to click [Conv. method].
2 As necessary, set the parameters.
• Processing is different for color images and monochrome images. If the camera type, color camera, or monochrome
camera, was changed from a previous setup, a reset of some settings may be needed.
Setting item
Set value
[Factory default]
Description
Conv. method
• 4 unit reference
• [Calculation]
Set the expression used for image conversion
4-unit reference: The parameters are set re
fe
rencing the reference coordinates
and measurement coordinates for the immediately preceding 4 units.
Confirm that the units are arranged according
to
the upper left coordinate, lower
left coordinate, lower right coordinate and upper right coordinate. To modify the
expression for the reference position and measurement position set with 4-unit
reference, select the Expression.
Source image
• Camera image
• [Prev image]
Set the image to be compensated.
Interpolation
• None
• [Bilinear]
Set the interpolation between pixels for image conversion.
To reduce conversion time more than raise compensation precision, set "None".
Perform processing so that a trapezoid-shaped image in which the object is displayed
diagonally can be more easily inspected.
Before processing
After processing
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