Straighten Ring-Shaped Image Region

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Function

This Step is used to straighten a ring-shaped region in the input image, thereby transforming it into a rectangular region.

Usage Scenario

This Step is a general image processing Step used for subsequent reading of ring-shaped characters.

Input Description

Input item	Description
Image	The specified region in the image input to this port will be straightened.
Alignment Parameter Group	Used to adjust the feature region’s pose in sync with the target object’s pose changes.

Input item

Description

Image

The specified region in the image input to this port will be straightened.

Alignment Parameter Group

Used to adjust the feature region’s pose in sync with the target object’s pose changes.

Parameter Description

Parameter	Description
ROI Settings	You can draw a ring-shaped ROI. The system will extract multiple columns of pixels based on the caliper settings, and the edge point pairs detected in each column will be used to detect the ring-shaped region. See 2D ROI Settings for more information about ROI.
Interpolation Method	Parameter description: Select the interpolation method for straightening the ring-shaped region to generate smoother edges and a more natural straightening effect. Value list: Nearest neighbor: This is a faster method, but it results in a coarse image. Bilinear: This is a commonly used method that produces a smoother image.
Radial Direction	Parameter description: This parameter is used to set the radial direction for straightening. Value list: * Clockwise: The ring-shaped region is swept clockwise from the start angle. * Counterclockwise: The ring-shaped region is swept counterclockwise from the start angle.

Parameter

Description

ROI Settings

You can draw a ring-shaped ROI. The system will extract multiple columns of pixels based on the caliper settings, and the edge point pairs detected in each column will be used to detect the ring-shaped region.

See 2D ROI Settings for more information about ROI.

Interpolation Method

Parameter description: Select the interpolation method for straightening the ring-shaped region to generate smoother edges and a more natural straightening effect.

Value list:

Nearest neighbor: This is a faster method, but it results in a coarse image.
Bilinear: This is a commonly used method that produces a smoother image.

Radial Direction

Parameter description: This parameter is used to set the radial direction for straightening.
Value list:
* Clockwise: The ring-shaped region is swept clockwise from the start angle.
* Counterclockwise: The ring-shaped region is swept counterclockwise from the start angle.

Output Description

Output item	Description
Straightened image	The image formed by straightening the ring-shaped region.

Output item

Description

Straightened image

The image formed by straightening the ring-shaped region.

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