How to solve the error: Expected input number 2, B, to be one of these types: logical, double, categorical Instead its type was uint8?

I used jaccard method as following:

A = imread('R7001-60.png');
I = im2gray(A);
figure
imshow(I)
title('OutPut Image')
mask = false(size(I));
mask(25:end-25,25:end-25) = true;
BW = activecontour(I, mask, 300);
BW_groundTruth = imread('gT7001_60.png');
similarity = jaccard(BW, BW_groundTruth);

and I got the following error:

Error using jaccard

Expected input number 2, B, to be one of these types:

logical, double, categorical

Instead its type was uint8.

Error in

jaccard>@(x,name,pos)validateattributes(x,{'logical','double','categorical'},{'real','nonempty','nonsparse'},mfilename,name,pos)

(line 118)

validateInput = @(x,name,pos) validateattributes(x, ...

Error in jaccard (line 124)

validateInput(B,'B',2);

Error in Gtruth3 (line 37)

similarity = jaccard(BW, BW_groundTruth);

can anyone help me to fix it?

Answer 1

[Matt J]

BW_groundTruth = logical(imread('gT7001_60.png'));

[yasmin ismail]

@Matt J thanks for your help but what does logical do?, I am new biggener in matlab

[Torsten]

https://uk.mathworks.com/help/matlab/ref/logical.html

[yasmin ismail]

@Matt J another question , I tried to use evaluatesemanticsegmentation function as follow:

destinationTestLabels = "D:\Matlab pics\matlab practices21\Phd analysis\trial meyhods\GroundTruth\crack\testLabels";

destinationTestImages = "D:\Matlab pics\matlab practices21\Phd analysis\trial meyhods\GroundTruth\crack\testImages";

testImagesDir = fullfile(destinationTestImages,'testImages');

testLabelsDir = fullfile(destinationTestLabels,'testLabels');

pixelLabelID = [1 0];

classNames = ["crack" "background"];

imds = imageDatastore(destinationTestImages);

pxdstest11 = pixelLabelDatastore(destinationTestLabels,classNames,pixelLabelID,"FileExtensions",".png");

data = load('triangleSegmentationNetwork');

net = data.net

pxdsResults = semanticseg(imds,net,"WriteLocation",tempdir);

I got the following error:

Error using SeriesNetwork/activations (line 817)

The spatial dimension sizes [313 316 3] of the input images to layer 'imageinput' must be greater than

or equal to the corresponding minimum input dimension sizes of the layer [32 32 1].

Error in semanticseg>iPredictDAGSeriesNetwork (line 609)

allScores = activations(net, X, layerName, ...

Error in semanticseg>iClassifyImagePixels (line 556)

allScores = iPredictDAGSeriesNetwork(X, net, params);

Error in semanticseg>iProcessImageDatastoreSerially (line 938)

L = iClassifyImagePixels(X{i}, net, params);

Error in semanticseg (line 265)

filenames = iProcessImageDatastoreSerially(ds, net, params);

Error in Gtruth3 (line 11)

pxdsResults = semanticseg(imds,net,"WriteLocation",tempdir);

I followed the same steps mentioned in:

www.mathworks.com/help/vision/ref/evaluatesemanticsegmentation.html

The files mentioned has the same previouse two attached images, can You help me to fix this erro to calculate IoU?

[Matt J]

@Matt J another question ,

Please post it in its own thread, and Accept-click the answer to the one you posted here.