Polar Transformation; Region Setting (Polar Transformation) - Omron FH-3 Series Reference Manual

Polar Transformation

Wide circle and fan shape images are transformed in polar coordinates and converted into orthogonal
coordinate images. The converted image is a measurement object for processing units in later stages.
Used in the Following Case
• This is used for judging characters printed around the circumference of caps and the like.
Example) Label layout
Important
• When using polar transformation and a position list, display with [Polar Transformation].
If the image is displayed with [Camera Image Input] or the like before the [Polar Transformation], the graphic is not
displayed correctly.
• Polar Transformation is always performed in a clockwise direction regardless of Region settings.
• 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.

Region Setting (Polar Transformation)

Set a region enclosing the character string that is lined up along a circle. Polar Transformation's Region setting
includes Circumference and Wide arc selections.
1
Use the Drawing tools to specify the measurement region.
2
Enclose the characters in the image.
3
Click [OK] in the Figure setting area.
• [OK]: Changes the settings and returns to the previous menu.
• [Cancel]: Changes are discarded. Returns to the previous menu.
• [Apply]: Updates the settings without leaving edit window.
The measurement region is registered and displayed in the Image Display area.
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Polar Transformation

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FH/FZ5 Processing Item Function Reference Manual