I am doing image compression using wavelets by using the function wcompress .My program is not working and giving errors. kindly help me.

Sir, I am doing image compression using wavelets with the help of the function wcompress. I am using matlab R2014a and I do have Wavelet Toolbox.The code is given below.

% X = imread('lowpass_approx_nonROI.bmp');
[cr,bpp] = wcompress('c',X,'lowpass_approx_nonROI.wtc','spiht','maxloop',12)
Xc = wcompress('u','lowpass_approx_nonROI.wtc');
delete('lowpass_approx_nonROI.wtc')
colormap gray;
subplot(1,2,1); image(X); title('Original Image');
axis square
subplot(1,2,2); image(Xc); title('Compressed Image');
axis square

It is giving error

Subscript indices must either be real positive integers or logicals.

Error in wtc_spiht>wtc_spiht_dec (line 523)
                              Signific_MAT(idx_CHILD+d_PIX_Plan) = ...

Error in wtc_spiht (line 22)
  case 2 , [varargout{1:nbout}] = wtc_spiht_dec(varargin{:});

Error in wtcmngr (line 97)
      [varargout{1:nbout}] = funHDL('dec',WTC_Struct,stepFLAG);

Error in wcompress (line 458)
      X_decoded = wtcmngr('read',inputFile,stepFLAG);

Error in comp_using_wavelets (line 3)
Xc = wcompress('u','lowpass_approx_nonROI.wtc');

Sir, kindly help me. The image is enclosed herewith. thanks and regards Debarpita Chaudhuri.

Answer 1

[Abdullah Sarwar]

try after resize !

it basically work on squire image resolution like 512*512 and 256*256