How to fix this error: Check for incorrect argument data type or missing argument in call to function 'categories'.?
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I applied the fokkowing code to read label pixel image to use it in evaluation jacard index:
dataDir = fullfile(toolboxdir('vision'),'visiondata');
imDir = fullfile(visiondatadir,'crack','7001-236.png');
pxDir = fullfile(visiondatadir,'CrackPixelLabelData_1','Label_1.png');
imds = imageDatastore(imDir);
classNames = ["crack"];
pixelLabelID = [1];
pxds = pixelLabelDatastore(pxDir,classNames,pixelLabelID);
I = read(imds);
C = read(pxds);
categories(C)
B = labeloverlay(I,C);
figure
imshow(B)
Then, I got the following error:
Check for incorrect argument data type or missing argument in call to function 'categories'.
Error in Untitled5 (line 30)
categories(C)
How to fix it, and how to use the label image in jaccard evaluation code?
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Answers (1)
Steven Lord
on 10 Oct 2023
which -all categories
This function is only defined for categorical arrays (and tall categorical and codistributed categorical arrays, I believe.) Is your variable C a categorical array? What does the command class( C) show?
7 Comments
Image Analyst
on 10 Oct 2023
If (the badly-named) "i" and "m" are length 0, then there is something wrong with your "Label_1.png".
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