how can I USE bwlabel command, please.....

I am on a project .... and hooked. Below is a command I used and the error message I get. Please help.

filteredThresh = threshImage;
figure; imshow(filteredThresh); title('After median filter')
labeledImage1 = bwlabel(filteredThresh, 8);
Error:Undefined function 'bwlabel' for input arguments of type 'double'.

Answer 1

[Guillaume]

Have you got the image processing toolbox? What does

ver

says?

You'd typically get this error if you don't have the toolbox installed and licensed

[Muhammad Bayero]

response for ver

---------------------------------------------------------------------------------------------
MATLAB Version: 8.4.0.150421 (R2014b)
MATLAB License Number: ••••••
Operating System: Microsoft Windows 8 Enterprise Version 6.2 (Build 9200)
Java Version: Java 1.7.0_11-b21 with Oracle Corporation Java HotSpot(TM) Client VM mixed mode
---------------------------------------------------------------------------------------------
MATLAB                                                Version 8.4        (R2014b)

[Guillaume]

You do not have the image processing toolbox installed. You need to install it, assuming it's included in your license.

[Muhammad Bayero]

Okay. thanks

Answer 2

[Image Analyst]

It appears from your title that filteredThresh might be a gray scale image (like uint8), not a binary image (like logical). bwlabel() expects a binary image. What does this show:

whos filteredThresh

It should say logical.

[Muhammad Bayero]

this is the response..... whos filteredThresh Name Size Bytes Class Attributes

filteredThresh      251x201            50451  logical