Measure Angle Between Edges

Measures the angle between two edges.

Optionally, a Boolean signal can be selected for the Enable Execution input so that the algorithm is only active if the value of the selected signal is TRUE.

Configuration options

• Inner Point: Position within the angle to be measured from which the edge search is started in the direction of Outer Point 1 and Outer Point 2.
• Outer Point 1: Position at which the search process for edge 1 ends.
• Outer Point 2: Position at which the search process for edge 2 ends.
• Edge Direction: Definition of the edge direction to be searched for from Inner Point to Outer Point 1 and Outer Point 2.
• Min Strength: Definition of the minimum strength or intensity difference of the edge being searched for.
• Search Lines: Width of the search window, i.e. the number of search lines (1, 3, 5, 7, ...), centered around the line defined by Inner Point and Outer Point 1 and Outer Point 2.
• Invert Search Direction: If TRUE, the search starts from each outer point in the direction of the inner point.
• Threshold: Threshold value for the binary image.
• Search Line Dist: (Optional) Distance between the search lines in pixels (> 0).
• Max Thickness: (Optional) Definition of the maximum thickness of the edge searched for. This means that Min Strength must be achieved within Max Thickness pixels.
• Algorithm: (Optional) Choice of edge detection algorithm.
• Subpixels Iterations: (Optional) Fixes the number of subpixels. For INTERPOLATION, 10 to 20 are usually sufficient. Alternatively, the value specifies the maximum number of iterations for optimizing the parameters; for APPROX_ERF and APPROX_GAUSSIAN, 50 to 100 is usually sufficient.
• Approx Precision: (Optional) Fixes the approximation precision for APPROX_ERF and APPROX_GAUSSIAN. 0.001 is usually sufficient; the value is not used for INTERPOLATION.

Output values

• Count Results: Is incremented when a new result is provided.
• hr: HRESULT error code that outputs the result of the processing.
• Angle: Angle between the edges found in degrees.
• Image: Initial image of the algorithm.
• Image Preview: (Optional) Image in which the edges found are shown.
• Image Threshold: (Optional) Image to which the set threshold is applied.
• New Result: (Optional) TRUE if a new result is provided.
• Edge Points 1: (Optional) Outputs the points found at the edge between Inner Point and Outer Point 1.
• Edge Point 2: (Optional) Outputs the points found at the edge between Inner Point and Outer Point 2.