Errors occurred during parsing of MATLAB function

I'm trying to run SPIHT algorithm without arithmetic coding with Matlab function block, an error occurred: Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24) Component: MATLAB Function | Category: Coder error

below the function code:

   function func_SPIHT_Main
  % Matlab implementation of SPIHT (without Arithmatic coding stage)
  %
  % Main function 
  %
  % input:    Orig_I : the original image.
  %           rate : bits per pixel
  % output:   img_spiht 
  %

fprintf('-----------   Welcome to SPIHT Matlab Demo!   ----------------\n');

fprintf('-----------   Load Image   ----------------\n');
infilename = '11.bmp';
outfilename = '1_reconstruct.bmp';

Orig_I = double(imread(infilename));

rate = 1;

OrigSize = size(Orig_I, 1);
max_bits = floor(rate * OrigSize^2);
OutSize = OrigSize;
image_spiht = zeros(size(Orig_I));
[nRow, nColumn] = size(Orig_I);

fprintf('done!\n');
fprintf('-----------   Wavelet Decomposition   ----------------\n');
n = size(Orig_I,1);
n_log = log2(n); 
level = n_log;
% wavelet decomposition level can be defined by users manually.

type = 'bior4.4';
[Lo_D,Hi_D,Lo_R,Hi_R] = wfilters(type);

[I_W, S] = func_DWT(Orig_I, level, Lo_D, Hi_D);

fprintf('done!\n');

fprintf('-----------   Encoding   ----------------\n');

img_enc = func_SPIHT_Enc(I_W, max_bits, nRow*nColumn, level);   

fprintf('done!\n');
fprintf('-----------   Decoding   ----------------\n');
img_dec = func_SPIHT_Dec(img_enc);

fprintf('done!\n');
fprintf('-----------   Wavelet Reconstruction   ----------------\n');
img_spiht = func_InvDWT(img_dec, S, Lo_R, Hi_R, level);

fprintf('done!\n');
fprintf('-----------   PSNR analysis   ----------------\n');

Q = 255;
MSE = sum(sum((img_spiht-Orig_I).^2))/nRow / nColumn;
fprintf('The psnr performance is %.2f dB\n', 10*log10(Q*Q/MSE));

please help, thanks

Answer 1

[Brian B]

The code you have posted may work just fine in MATLAB, but will not work in Simulink. Not all functions are supported for use in a MATLAB function block. In fact, you should have seen other errors (in addition to the one you described) telling you exactly which unsupported function the compiler first detected, such as:

"The function 'imread' is not supported for standalone code generation."

For a list of those functions that are supported, see http://www.mathworks.com/help/simulink/ug/functions-supported-for-code-generation--alphabetical-list.html. In particular, you cannot use imread or wfilters. There may be calls to other unsupported functions inside func_SPIHT_Enc, func_SPIHT_Dec, func_InvDWT

For other general information about the block, see http://www.mathworks.com/help/simulink/slref/matlabfunction.html.

[hanaa]

attached the whole code and all errors appear are those:

Function 'MATLAB Function' (#25.2051.2057), line 82, column 26: "Orig_I" Launch diagnostic report. Component: MATLAB Function | Category: Coder error

 Undefined function or variable 'MSE'. The first assignment to a local variable determines its class.

Function 'MATLAB Function' (#25.2138.2141), line 83, column 59: "MSE" Launch diagnostic report. Component: MATLAB Function | Category: Coder error

 Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24)
Component: MATLAB Function | Category: Coder error

 Code Directory :
     "C:\Users\hanaa\Documents\MATLAB\slprj\_sfprj\spiht_try\_self\sfun\src"

Machine (#21): "spiht_try" Target : "sfun"

Chart "MATLAB Function" (#24):

. Code generation failed Errors occurred during parsing of MATLAB function 'MATLAB Function'(#24)