问题
I was following a tutorial in matlab documentation at http://www.mathworks.com/help/vision/examples/automatically-detect-and-recognize-text-in-natural-images.html
There they use a function helperGrowEdges but I it is not being recognized right now. I verified that I have Computer Vision System Toolbox. I am unable to figure how to implement it. It says it 'Grow the edges outward by using image gradients around edge locations', but I am unable to figure out how to implement is well.
回答1:
As hinted out by Naveh, It works those functions are present only in MATLAB 2014 version and not in older versions.
Older versions do not have that example as well when I try to open edit TextDetectionExample
回答2:
This example first appears in release R2014a. helperGrowEdges is a helper function, which goes with the example. Unfortunately it does not get published in the documentation. The only way for you to see it is to get access to an installation of MATLAB R2014a with the Computer Vision System Toolbox, and do edit helperGrowEdges.
来源：https://stackoverflow.com/questions/23142176/what-is-helpergrowedges-function-in-matlab