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: dfltimg_parallax.m
    path of file: ./repos/digital-art-with-matlab/parallax
    
    the code of the file until where you have to start completion: function dfltimg_parallax()
% Get the default image cdata and display 4 images in a rotating cube.

    I = get(groot,'defaultimageCData');
    defimage = pow2(I,47);

    % Compute the images from the default CData
    I1 = bitslice(defimage,42,46);
    I2 = 
    
function b = bitslice(a,lowbit,highbit)
    % BITSLICE(A,LOWBIT,HIGHBIT)
    %
    %   Scales return values so that the maximum is 1.0.

    b = a / 2^(lowbit);
    b = fix(b);
    b = b / 2^(highbit - lowbit + 1);
    b = b - fix(b);

    b = b / max(b(:));

    % To work with parallaxPlot, pull up only the brightest pixels.
    b = floor(b*1.8);

    b([end