How do I resolve a syntax error when using BLOCKPROC?

function [normim, mask, maskind] = aridgesegment(im, blksze, thresh)

im = normalize(im,0,1); % normalise to have zero mean, unit std dev

fun = inline('std(x(:))*ones(size(x))');

stddevim = blockproc(im, [blksze blksze], fun);

mask = stddevim > thresh; maskind = find(mask);

% Renormalise image so that the ridge regions have zero mean, unit % standard deviation. im = im - mean(im(maskind)); normim = im/std(im(maskind));

Error using ==> BLOCKPROC Argument 'Function' failed validation with error: Invalid block function. BLOCKPROC expects the user function, FUN, to be a valid function handle.

Error in ==> blockproc>parse_inputs at 369 parser.parse(varargin{:});

Error in ==> blockproc at 161 parsed_args = parse_inputs(varargin{:});

Error in ==> aridgesegment at 50 stddevim = blockproc(im, [blksze blksze], fun);

Answer 1

[Andrei Bobrov]

please read help about function blockproc

eg

fun = @(block_struct)std2(block_struct.data) * ones(size(block_struct.data)));
stddevim = blockproc(im, [blksze blksze], fun);

Answer 2

[dee koshy]

oh Thankyou sooo much! :):)