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: vl_quickvis.m
    path of file: ./repos/2016_person_re-ID/vlfeat/toolbox/quickshift
    
    the code of the file until where you have to start completion: function [Iedge dists map gaps] = vl_quickvis(I, ratio, kernelsize, maxdist, maxcuts)
% VL_QUICKVIS Create an edge image from a Quickshift segmentation.
%   IEDGE = VL_QUICKVIS(I, RATIO, KERNELSIZE, MAXDIST, MAXCUTS) creates an edge
%   stability image from a Quickshift segmentation. RATIO controls the tradeoff
%   between color consistency and spatial consistency (See VL_QUICKSEG) and
%   KERNELSIZE controls the bandwidth of the density estimator (See VL_QUICKSEG,
%   VL_QUICKSHIFT). MAXDIST is the maximum distance between neighbors which
%   increase the density.
%
%   VL_QUICKVIS takes at most MAXCUTS thresholds less than MAXDIST, forming at
%   most MAXCUTS segmentations. The edges between regions in each of these
%   segmentations are labeled in IEDGE, where the label corresponds to the
%   largest DIST which preserves the e
    
function [Iedge dists] = mapvis(map, gaps, maxdist, maxcuts)
% MAPVIS Create an edge image from a Quickshift segmentation.
%   IEDGE = MAPVIS(MAP, GAPS, MAXDIST, MAXCUTS) creates an edge
%   stability image from a Quickshift segmentation. MAXDIST is the maximum
%   distance between neighbors which increase the density.
%
%   MAPVIS takes at most MAXCUTS thresholds less than MAXDIST, forming at most
%   MAXCUTS segmentations. The edges between regions in each of these
%   segmentations are labeled in IEDGE, where the label corresponds to the
%   largest DIST which preserves the edge.
%
%   [IEDGE,DISTS] = MAPVIS(MAP, GAPS, MAXDIST, MAXCUTS) also returns the DIST
%   thresholds that were chosen.
%
%   IEDGE = MAPVIS(MAP, GAPS, DISTS) will use the DISTS specified
%
% See Also: VL_QUICKVIS, VL_QUICKSHIFT, VL_QUICKSEG

if nargin == 3
  dists = maxdist;
  maxdist = max(dists);
else
  dists = unique(floor(gaps(:)));
  dists = dists(2:end