When trying to use imageSegmenter with a a uint8 from the workspace or from file, I get a strange error.

So I have a very simple code:

clear
clc
close all

I = imread('Ji2013t.PNG');
figure
imagesc(I)
axis equal

%%imdistline 100 microns = 30 pixels
Ic = I(1:135,142:end,:);
Ic = (Ic);

figure
imagesc(Ic)
axis equal

imageSegmenter(Ic);

And MATLAB 2017b runs all of this fine. However, when it opens the ImaeSegmenter App, it throws a ton of red, with the message:

57                  imageLoadSuccess = self.Toolstrip.loadImageInSegmentTab(im);
Warning: The following error was caught while executing
'iptui.internal.segmenter.TwoMaskScrollPanel' class destructor:
Undefined function 'isvalid' for input arguments of type 'double'.

Error in iptui.internal.segmenter.TwoMaskScrollPanel/delete (line
221)
            if isvalid(self.hFig)

Error in iptui.internal.segmenter.TwoMaskScrollPanel (line 36)
        function self = TwoMaskScrollPanel(im)

Error in
iptui.internal.segmenter.ImageSegmentationTool/buildScrollPanel
(line 590)
            self.ScrollPanel =
            iptui.internal.segmenter.TwoMaskScrollPanel(im);

Error in
iptui.internal.segmenter.ImageSegmentationTool/createSessionFromImage
(line 89)
            self.buildScrollPanel(im);

Error in iptui.internal.segmenter.SegmentTab/importImageData (line
202)
            self.hApp.createSessionFromImage(im,
            self.IsDataNormalized, self.IsInfNanRemoved);

Error in iptui.internal.segmenter.Toolstrip/loadImageInSegmentTab
(line 100)
            TF = self.hSegmentTab.importImageData(im);

Error in iptui.internal.segmenter.ImageSegmentationTool (line 57)
                imageLoadSuccess =
                self.Toolstrip.loadImageInSegmentTab(im);

Error in imageSegmenter (line 46)
        iptui.internal.segmenter.ImageSegmentationTool(I,isRGB);

Error in Ji2013 (line 18)
imageSegmenter(Ic); 
> In iptui.internal.segmenter.TwoMaskScrollPanel (line 36)
  In iptui.internal.segmenter.ImageSegmentationTool/buildScrollPanel (line 590)
  In iptui.internal.segmenter.ImageSegmentationTool/createSessionFromImage (line 89)
  In iptui.internal.segmenter.SegmentTab/importImageData (line 202)
  In iptui.internal.segmenter.Toolstrip/loadImageInSegmentTab (line 100)
  In iptui.internal.segmenter.ImageSegmentationTool (line 57)
  In imageSegmenter (line 46)
  In Ji2013 (line 18) 
Error using figure
Value must be either:
an Mx3 array of type single or double in the range [0 1]
an Mx3 array of type uint8

Error in iptui.internal.segmenter.TwoMaskScrollPanel (line 43)
            self.hFig = figure(...

Error in
iptui.internal.segmenter.ImageSegmentationTool/buildScrollPanel
(line 590)
            self.ScrollPanel =
            iptui.internal.segmenter.TwoMaskScrollPanel(im);

Error in
iptui.internal.segmenter.ImageSegmentationTool/createSessionFromImage
(line 89)
            self.buildScrollPanel(im);

Error in iptui.internal.segmenter.SegmentTab/importImageData (line
202)
            self.hApp.createSessionFromImage(im,
            self.IsDataNormalized, self.IsInfNanRemoved);

Error in iptui.internal.segmenter.Toolstrip/loadImageInSegmentTab
(line 100)
            TF = self.hSegmentTab.importImageData(im);

Error in iptui.internal.segmenter.ImageSegmentationTool (line 57)
                imageLoadSuccess =
                self.Toolstrip.loadImageInSegmentTab(im);

Error in imageSegmenter (line 46)
        iptui.internal.segmenter.ImageSegmentationTool(I,isRGB);

Error in Ji2013 (line 18)
imageSegmenter(Ic);

I have never experienced this kind of error from MATLAB. I'm ussually prett aware of any errors I can make, but I have no clue for this one. I tried to convert my uint8 to double using double(Ic), but that failed too. I tried to upload from file, same error, I tried different images, no go, I even tried to debug the function iptui.internal.segmenter.ImageSegmentationTool(I,isRGB), and got to:

imageLoadSuccess = self.Toolstrip.loadImageInSegmentTab(im);

However, when trying to go into loadImageInSegment, I run int problems as it is either JAVA or C++ code and MATLAB can't find it.

Any help would be useful.

Sincerely

Alex

[Alexander Dumont]

After further digging, I determined that line 221 of function 'iptui.internal.segmenter.TwoMaskScrollPanel' is the error. The function isvalid does not seem to be defined. Very strange.

Answer 1

[Harsha Priya Daggubati]

Hi

I tried reproducing the issue in 2017b version, but everything works fine for me. I suggest to use the following commands and run the code again.

rehash toolbox
rehash toolboxcache

Hope this works!