BLOCKPROC encountered an error while evaluating the user-supplied function handle, FUN. Caused by: Undefined function or variable 'net'.

can anyone suggest a way out of this and explain why is this error is occuring.

allcount=Inf;
     I = imread('frame1359.jpg');
     count=0;
     myFilterHandle = @myFilter;
     blockyImage = blockproc(I,[20 20], myFilterHandle);
     allcount(2,1)=count;
     disp(count);

       function singleValue = myFilter(blockStruct)
          s=(blockStruct.data);
          r=imresize(s,[227 227]);
  % net is a classifier already trained and loaded
          pred=classify(net,r);
          if pred =='1'
              count=count+1;
          end
  % this is just for blockproc to keep running this is line (imresize) is not important 
  %if i dont use this blockproc wont proceed to next iteration.
          singleValue=imresize(blockStruct.data,0.5); 
       end

Answer 1

[Walter Roberson]

   % net is a classifier already trained and loaded

However, it is not loaded in the workspace of the function myFilter .

http://www.mathworks.com/help/matlab/math/parameterizing-functions.html

[Samir khan]

thanks Walter Roberson for answering, but i am not able to think how i can load the "net" into the workspace of myFilter (however it is loaded in matlab workspace). the documentation is for loading a function. can you suggest a way? thankyou.

[Walter Roberson]

       myFilterHandle = @(blockStruct) myFilter(blockStruct, net);

together with

         function singleValue = myFilter(blockStruct, net)

[Samir khan]

thanks sir. now i am able to classify the images. thank you very much.