You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jpeg2k2im.m
    path of file: ./repos/digital-image-processing-matlab/sample_code/DIPUM_toolbox_m-file_v1.1.3
    
    the code of the file until where you have to start completion: function x = jpeg2k2im(y)

    
function x = jpeg2k2im(y)
%JPEG2K2IM Decodes an IM2JPEG2K compressed image.
%   X = JPEG2K2IM(Y) decodes compressed image Y, reconstructing an
%   approximation of the original image X.  Y is an encoding
%   structure returned by IM2JPEG2K. 
%
%   See also IM2JPEG2K.

%   Copyright 2002-2004 R. C. Gonzalez, R. E. Woods, & S. L. Eddins
%   Digital Image Processing Using MATLAB, Prentice-Hall, 2004
%   $Revision: 1.4 $  $Date: 2003/10/26 18:39:40 $

error(nargchk(1, 1, nargin));       % Check input arguments

% Get decoding parameters: scale, quantization vector, run-length
% table size, zero run code, end