Error - Undefined function 'imbinarize' for input arguments of type 'double' in matlab

Question

when I calculate threshold using entropy and the convert grayscale image to binary image using imbinarize(img,T) it shows the error. How to deal with this error

score 1 · Accepted Answer · 2016-12-14 12:29:44Z

1

imbinarize uses a 256 bin image histogram to compute Otsu's threshold, so it expects a 'uint' image.

From the error we can deduce that your image is double, so just convert it to uint:

img = im2uint8(img)

and then run imbinarize on top of im

im_binarized = imbinarize(img,T)

EDIT:

Also your problem might be that you don't have the image processing toolbox installed.

You can threshold an image without the toolbox, just do:

im_binarized = im > T;   % where T is your threshold

edited Dec 14, 2016 at 12:29

answered Dec 14, 2016 at 12:19

user2261062

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2 Comments

sohna pathak Over a year ago

Undefined function 'im2unit8' for input arguments of type 'double'. show this error

user2261062 Over a year ago

Probably you don't have the image processing toolbox installed. See my edit to threshold an image without the toolbox. Otherwise install the toolbox.

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