BM=roipoly(I), won't load figure window and create an interactive polygon selection tool. Is there a problem with the function?

4 次查看（过去 30 天）
Sean Goulding
Sean Goulding 2022-3-1
评论： Steve Eddins 2022-3-15
It doesn't seem like there are any problems with my code, in reference to the roipoly MATLAB function documentation. Is there something wrong with the function in the version of MATLAB I am using? I am using R2020a.
Code:
img=double(imread('ali.jpg'))./255;
M=roipoly(img);
Errors:
Error in polygonSymbol/initialize (line 49)
h_close_line_bottom = line('Color', 'w', ...
Error in basicPolygon (line 36)
draw_api.initialize(h_group);
Error in impoly>impolyAPI (line 223)
basicPolygonAPI =
basicPolygon(h_group,draw_api,positionConstraintFcn);
Error in impoly (line 99)
[h_group,draw_api] = impolyAPI(varargin{:});
Error in iptui.roiPolygon (line 10)
obj = obj@impoly(h_parent,[]);
Error in createWaitModePolygon (line 17)
h_poly = iptui.roiPolygon(h_ax,finished_cmenu_text);
Error in roipoly>parse_inputs (line 184)
[xi,yi,placement_cancelled] =
createWaitModePolygon(gca,cmenu_text);
Error in roipoly (line 80)
[xdata,ydata,num_rows,num_cols,xi,yi,placement_cancelled] =
parse_inputs(varargin{:});
Error in Untitled2 (line 3)
M=roipoly(img);
  2 个评论
Steve Eddins
Steve Eddins 2022-3-15
I suspect something is wrong with your installation, or perhaps with your MATLAB search path. Is there another version of roipoly on your search path? What is the output of this:
which -all roipoly
Also, were any actual error messages printed? Your question includes only the error stack information (those "Error in" lines).
Finally, was there already a figure window displayed with other content? If so, does the result change if you close all figure windows first?

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