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Vision Canny Edge

Beta

This block is currently a beta version. If you are using this block, we would appreciate any feedback at tech@quanser.com.

Detects edges on the input image.

Library

QUARC Targets Beta/Image Processing/Open Source Computer Vision

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

Vision Canny Edge

The Vision Canny Edge block finds the edges on the input image and marks them in the output image using the Canny algorithm.

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.

Output Ports

dst_image

A binary destination image that marks the edges in 8-bit format.

err

An error signal which is negative in case of invalid memory allocation or usage of invalid parameter values.

Parameters and Dialog Box

Vision Canny Edge

Input image

Specifies the type of input image to be used for edge detection. The available options are Gray, Blue, Green, and Red. If the input image is a color image, this block either converts it into a grayscale image or splits it into red, green, or blue color plane according to the specified parameter. On the other hand, if the input is a grayscale or binary image, the edge detection algorithm is directly applied to it.

Kernel size

Specifies a kernel size of Sobel operator to be convolved with the input image.

Threshold values

Specify the threshold values, where the smallest one is used for edge linking and the largest one is used to find initial segments of strong edges.

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

Target Name

Compatible*

Model Referencing

Comments

QUARC Win32 Target

No

No

Not supported.

QUARC Win64 Target

No

No

Not supported.

QUARC Linux Nvidia Target

Yes

Yes

QUARC Linux QBot Platform Target

Yes

Yes

QUARC Linux QCar 2 Target

Yes

Yes

QUARC Linux QDrone 2 Target

Yes

Yes

QUARC Linux Raspberry Pi 3 Target

Yes

Yes

QUARC Linux Raspberry Pi 4 Target

Yes

Yes

QUARC Linux RT ARMv7 Target

Yes

Yes

QUARC Linux x64 Target

Yes

Yes

QUARC Linux DuoVero Target

Yes

Yes

QUARC Linux DuoVero 2016 Target

Yes

Yes

QUARC Linux Verdex Target

Yes

Yes

QUARC QNX x86 Target

No

No

Not supported.

Rapid Simulation (RSIM) Target

No

No

Not supported.

S-Function Target

No

N/A

Old technology. Use model referencing instead.

Normal simulation

Yes

Yes

* Compatible means that the block can be compiled for the target.

See Also

 

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