Why i get empty (black image) when extract the pixel label data

when i extract pixel label data to path forlder i founded the images empty (black images)!!

Answer 1

[Navya Singam]

Hi,

You can refer to the following MATLAB answer: Why do I get all black image result after exporting Labels as PNG file format from the Image Labeler App? - MATLAB Answers - MATLAB Central (mathworks.com)

[yasmin ismail]

@Navya Singam I used you the link above, it helped to show the label images but how to use it to find jaccrad index , the labeled image already black and gives low jaccard index as shown in attached images and following code:

A = logical(imread('7001-236.png'));

BW_groundTruth =logical(imread('Label_1.png'));

similarity = jaccard(A(:,:,1), BW_groundTruth)

similarity =

0.0925