Trapezoidal Correction; Conversion Method (Trapezoidal Correction) - Omron FH-3 Series Reference Manual

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
Perform processing so that a trapezoid-shaped image in which the object is displayed
diagonally can be more easily inspected.
Before processing
Important
• 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.

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.
Setting item
[Factory default]
• 4 unit reference
Conv. method
• [Calculation]
• Camera image
Source image
• [Prev image]
• None
Interpolation
• [Bilinear]
FH/FZ5 Processing Item Function Reference Manual
Set value
Set the expression used for image conversion
4-unit reference: The parameters are set referencing 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.
Set the image to be compensated.
Set the interpolation between pixels for image conversion.
To reduce conversion time more than raise compensation precision, set "None".
After processing
Description

Trapezoidal Correction

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