Error in code when using apps in the image processing toolbox

Good morning,

I used the image segmenter app in the image processing toolbox in Matlab and then exported the code for what i did. However when i tried to rerun the code, the errors in the attached picture popped up. How do i solve them?

Thank you

Answer 1

[Walter Roberson]

that code is not designed to prompt you for image information . you need to read in an rgb image and pass the image array to the function through the command line .

[Zo]

sorry but i’m new to matlab, what do you mean by pass the image array to the function through the command line?

[Walter Roberson]

filename = 'MR.png';
img = imread(filename);
[BW, masked_img] = Masked_Img_of_Reg_Area_P1(img);

[Zo]

yes it worked! thank you!

so what would be the code if i wanted to create a freehand region of interest for the red portion of the attached image?

[Walter Roberson]

https://www.mathworks.com/help/images/ref/imfreehand.html for before R2018b.

In R2018b you might also want to try https://www.mathworks.com/help/images/ref/drawassisted.html

[Zo]

thank you very much for your help!