Vision Draw Shape
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This block is currently a beta version. If you are using this block, we would appreciate any feedback at tech@quanser.com. |
Draws curve and shapes.
Library
MATLAB Command Line
Click to copy the following command line to the clipboard. Then paste it in the MATLAB Command Window:
qc_open_library('quarc_library_beta/Image Processing/Open Source Computer Vision')Description
The Vision Draw Shape block draws curve (line) and shapes (rectangle, circle, and ellipse) on the input image. The number of input ports varies depending on the type of shape to be drawn.
In order to use this block, be sure to follow the instructions described on the Vision Capture Image page, and take careful note of the limitations.
Input Ports
This block provides three input ports, namely, src_image, pt1, and pt2 for drawing a line or a rectangle. It provides three input ports, namely, src_image, center, and radius for drawing a circle. The number of input ports is six, namely, src_image, center, axes, angle, star_angle, and end_angle in case of an ellipse and it has four input ports, namely, src_image, center, angle, and size in case of an ellipse box.
src_image
A handle to a source image that uses OpenCV (Open Source Computer Vision) IplImage structure.
The input may be a color or grayscale image.
pt1
Specifies (x, y) coordinate of the first point of a line segment or one of the rectangle vertices.
pt2
Specifies (x, y) coordinate of the second point of a line segment or the opposite rectangle vertex.
center
Specifies (x, y) coordinate of the center of a circle, ellipse, or an ellipse box.
radius
Specifies radius (in pixels) of a circle.
axes
Specifies axes lengths of an ellipse in (x, y) directions.
angle
Specifies the rotation angle of an ellipse (box).
start_angle
Specifies the starting angle of an elliptic arc.
end_angle
Specifies the ending angle of an elliptic arc.
size
Specifies width and height of an ellipse box.
Output Ports
dst_image
A handle to the destination image, which may be in 24-bit or 8-bit format depending on the input image. The output image shows the shape drawn at the specified location.
err
An error signal which is negative in case of invalid memory allocation or usage of invalid parameter values.
Parameters and Dialog Box
Draw
Specifies the type of shape to be drawn. The available options of shapes are Line, Rectangle,
Circle, Ellipse, and Ellipse Box.
Color
Specify color components of the shape to be drawn.
Thickness
Specifies a thickness of the selected shape.
Line type
Specifies a type of shape boundary, which is 4-connected, 8-connected, or Antialiased.
Antialiased shapes are drawn using Gaussian filtering.
Erase old trace
If this check box is selected, old traces are erased from the output image.
Updated image name
Specifies a name of the output image to be saved prior to model termination. The image is saved in JPEG file format. For example, the filename "/media/card/updatedimage" indicates that the image is saved under "/media/card/" folder with the filename updatedimage.jpg.
Sample time
The sample time of the block. A sample time of 0 indicates that the block will be treated as a continuous time block. A positive sample time indicates that the block is a discrete time block with the given sample time. A sample time of -1 indicates that the block inherits its sample time.
Targets
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Target Name |
Compatible* |
Model Referencing |
Comments |
|---|---|---|---|
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No |
No |
Not supported. |
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No |
No |
Not supported. |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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Yes |
Yes |
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No |
No |
Not supported. |
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Rapid Simulation (RSIM) Target |
No |
No |
Not supported. |
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S-Function Target |
No |
N/A |
Old technology. Use model referencing instead. |
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Normal simulation |
Yes |
Yes |
See Also
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