Vision Gray Threshold
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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. |
Thresholds a grayscale image.
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 Gray Threshold block applies fixed-level thresholding to a grayscale image.
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
src_image
A handle to a source image that uses OpenCV (Open Source Computer Vision) IplImage structure. If the input is a color image, this block converts it to a gray image and then employs fixed-level thresholding to generate an output image.
Output Ports
dst_image
Thresholded destination image in 8-bit gray or binary format.
err
Negative signal value in case of memory allocation error.
Parameters and Dialog Box
Threshold
Specifies a grayscale value for thresholding operation.
Threshold type
Specifies the type of thresholding to be used. The options are BINARY, BINARY_INV, TRUNC, TOZERO,
and TOZERO_INV. The options are described as follows:
BINARY:
dst_image(x,y) = 255, if src_image(x,y)>Threshold
0, otherwise
BINARY_INV:
dst_image(x,y) = 0, if src_image(x,y)>Threshold
255, otherwise
TRUNC:
dst_image(x,y) = threshold, if src_image(x,y)>Threshold
src_image(x,y), otherwise
TOZERO:
dst_image(x,y) = src_image(x,y), if src_image(x,y)>Threshold
0, otherwise
TOZERO_INV:
dst_image(x,y) = 0, if src_image(x,y)>Threshold
src_image(x,y), otherwise
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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