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AugeLab Studio Manual
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Minimum Rectangle

Minimum Rectangle Node Documentation

The Minimum Rectangle node in AugeLab Studio calculates the minimum enclosing rectangle for a given contour. It outputs the image with the enclosing rectangle drawn, the center coordinates of the rectangle, the width, and the height.

Node Overview

The Minimum Rectangle node takes an image and a contour as inputs and provides the following outputs:
  1. 1.
    Image: The input image with the minimum enclosing rectangle drawn.
  2. 2.
    Center: The center coordinates of the minimum enclosing rectangle.
  3. 3.
    Width: The width of the minimum enclosing rectangle.
  4. 4.
    Height: The height of the minimum enclosing rectangle.

Node Properties

  • Node Title: Minimum Rectangle
  • Node ID: OP_NODE_MIN_RECT

Inputs

The Minimum Rectangle node has the following input sockets:
  1. 1.
    Image: The input image.
  2. 2.
    Contour: The contour for which the minimum enclosing rectangle is to be calculated.

Outputs

The Minimum Rectangle node has the following output sockets:
  1. 1.
    Image: The input image with the minimum enclosing rectangle drawn.
  2. 2.
    Center: The center coordinates of the minimum enclosing rectangle.
  3. 3.
    Width: The width of the minimum enclosing rectangle.
  4. 4.
    Height: The height of the minimum enclosing rectangle.

Node Interaction

  1. 1.
    Connect an image to the Image input socket of the Minimum Rectangle node.
  2. 2.
    Connect a contour to the Contour input socket of the Minimum Rectangle node.
  3. 3.
    Run the pipeline.
  4. 4.
    The output sockets will provide the image with the minimum enclosing rectangle drawn, the center coordinates of the rectangle, the width, and the height.

Implementation Details

The Minimum Rectangle node uses the cv2.boundingRect function from the OpenCV library to calculate the minimum enclosing rectangle for the given contour. The function returns the coordinates of the top-left corner of the rectangle, as well as its width and height. The node then draws the minimum enclosing rectangle on the input image using the obtained parameters.

Usage

  1. 1.
    Drag and drop the Minimum Rectangle node from the node library onto the canvas in AugeLab Studio.
  2. 2.
    Connect an image to the Image input socket of the Minimum Rectangle node.
  3. 3.
    Connect a contour to the Contour input socket of the Minimum Rectangle node.
  4. 4.
    Run the pipeline.
  5. 5.
    The output sockets of the Minimum Rectangle node will provide the image with the minimum enclosing rectangle drawn, the center coordinates of the rectangle, the width, and the height.

Notes

  • The Minimum Rectangle node is useful for calculating the minimum enclosing rectangle for a given contour in an image.
  • The node outputs the image with the minimum enclosing rectangle drawn, allowing you to visualize the rectangle.
  • The center coordinates, width, and height can be used for further analysis or calculations.
  • Ensure that the input image and contour are correctly connected to the corresponding input sockets of the Minimum Rectangle node.
  • The output socket Image provides the input image with the minimum enclosing rectangle drawn.
  • The output socket Center provides the center coordinates of the minimum enclosing rectangle.
  • The output socket Width provides the width of the minimum enclosing rectangle.
  • The output socket Height provides the height of the minimum enclosing rectangle.
That concludes the documentation for the Minimum Rectangle node in AugeLab Studio. Use this node to calculate the minimum enclosing rectangle for a contour in an image and extract the center coordinates, width, and height for further analysis or visualization.
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Last modified 4mo ago