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Undefined variable "vision" or class "vision.HoughTransform".

Asked by James Kempton on 6 Mar 2019
Latest activity Answered by James Kempton on 6 Mar 2019
I am using MATLAB version 2018b. I have the Computer Vision Toolbox installed as confirmed by using the ver command. However, upon using the following code:
hhoughtrans = vision.HoughTransform(pi/360,'ThetaRhoOutputPort', true);
I receive the following error message: Undefined variable "vision" or class "vision.HoughTransform".
Similarly, when using:
hhoughlines = vision.HoughLines('SineComputation','Trigonometric function');
I receive: Undefined variable "vision" or class "vision.HoughLines".
My conclusion is that vision.HoughTransform and vision.HoughLines are no longer supported though I haven't seen anywhere something to the contrary. Is this conclusion correct or could there be another issue?

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R2018b

3 Answers

Answer by James Kempton on 6 Mar 2019
 Accepted Answer

Thuis is the output of ver:
ver.PNG
So I have it installed. I presume it is licensed given I have a license or are these different things?

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Hmm. It's doing the same thing for me. The release notes states that they planned on removing this at some point:
But yet I still see it mentioned in Fixed Point Deisgner in 18b so there's a bug somewhere, doc or otherwise.

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Answer by Sean de Wolski
on 6 Mar 2019

Do you have the computer vision system toolbox installed and licensed?
ver

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Answer by James Kempton on 6 Mar 2019

Thanks for the information Sean. I'll just use hough instead.

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