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cnn_setup_data.m
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cnn_setup_data.m
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function imdb = cnn_setup_data(varargin)
opts.nSplit = 1;
opts.dataPath = '';
opts.flowDir = '';
opts.dataSet = 'ucf101' ;
[opts, varargin] = vl_argparse(opts, varargin) ;
opts.dataDir = fullfile(opts.dataPath,opts.dataSet) ;
opts.imageDir = fullfile(opts.dataDir, 'jpegs_256') ;
[opts, varargin] = vl_argparse(opts, varargin) ;
switch opts.dataSet
case 'ucf101'
nClasses = 101 ;
case 'hmdb51'
nClasses = 51 ;
opts.flowDir = strrep(opts.flowDir, 'ucf101','hmdb51');
end
opts.splitDir = [opts.dataSet '_splits'];
% -------------------------------------------------------------------------
% Load categories metadata
% -------------------------------------------------------------------------
[Training_set, Testing_set, cats]= feval(sprintf('get_%s_split', lower(opts.dataSet)),opts.nSplit,opts.splitDir);
naction = length(Training_set);
nTrain = 0; nTest = 0;
for iaction = 1:naction
nTrain = nTrain + numel(Training_set{iaction});
nTest = nTest + numel(Testing_set{iaction});
labels_train{iaction} = repmat(iaction,1,numel(Training_set{iaction}));
labels_test{iaction} = repmat(iaction,1,numel(Testing_set{iaction}));
end
labels_train = [labels_train{:}];
labels_test = [labels_test{:}];
imdb.classes.name = cats ;
imdb.videoDir = fullfile(opts.dataDir, 'avis') ;
imdb.imageDir = opts.imageDir;
imdb.flowDir = opts.flowDir;
imdb.images.name = horzcat(Training_set{:},Testing_set{:}) ;
imdb.images.set = horzcat(ones(1, nTrain), 2*ones(1, nTest)) ;
imdb.images.label = horzcat(labels_train, labels_test) ;
imdb.images.labels = double(repmat(imdb.images.label,nClasses,1)' == repmat(1:nClasses,length(imdb.images.label),1));
imdb.images.nFrames = zeros(1, numel(imdb.images.name)) ;
imdb.images.flowScales = cell(1,numel(imdb.images.name));
% get frames
vids = imdb.images.name;
for v=1:numel(vids)
vid_name = vids(v); vid_name = vid_name{1}(1:end-4);
ims = dir(fullfile(imdb.imageDir, vid_name, '*.jpg'));
imdb.images.nFrames(v) = numel(ims);
end
function [train_fnames,test_fnames, saction]= get_ucf101_split(isplit,splitdir)
fid = fopen([splitdir '/classInd.txt']);
classes = textscan(fid, '%s');
saction = classes{1}(2:2:end);
fname = sprintf('%s/testlist0%d.txt',splitdir,isplit);
fid = fopen(fname);
test_fnames = cell(length(saction),1);
train_fnames = cell(length(saction),1);
while 1
tline = fgetl(fid);
if tline==-1
break
end
[tline, u] = strtok(tline,' ');
video = sprintf('%s.avi',tline(1:end-4));
[className, vidName] = strtok(video,'/');
iaction = find(strcmp(saction, className));
test_fnames{iaction}{end+1} = vidName(2:end);
end
fclose(fid);
itr = 1;
fname = sprintf('%s/trainlist0%d.txt',splitdir,isplit);
fid = fopen(fname);
while 1
tline = fgetl(fid);
if tline==-1
break
end
[tline, u] = strtok(tline,' ');
video = sprintf('%s.avi',tline(1:end-4));
[className, vidName] = strtok(video,'/');
iaction = find(strcmp(saction, className));
train_fnames{iaction}{end+1} = vidName(2:end);
end
fclose(fid);
function [train_fnames,test_fnames, saction]= get_hmdb51_split(isplit,splitdir)
saction = {'brush_hair','cartwheel','catch','chew','clap','climb','climb_stairs',...
'dive','draw_sword','dribble','drink','eat','fall_floor','fencing',...
'flic_flac','golf','handstand','hit','hug','jump','kick_ball',...
'kick','kiss','laugh','pick','pour','pullup','punch',...
'push','pushup','ride_bike','ride_horse','run','shake_hands','shoot_ball',...
'shoot_bow','shoot_gun','sit','situp','smile','smoke','somersault',...
'stand','swing_baseball','sword_exercise','sword','talk','throw','turn',...
'walk','wave'};
for iaction = 1:length(saction)
itr = 1;
ite = 1;
fname = sprintf('%s/%s_test_split%d.txt',splitdir,saction{iaction},isplit);
fid = fopen(fname);
while 1
tline = fgetl(fid);
if tline==-1
break
end
[tline, u] = strtok(tline,' ');
u = str2num(u);
video = sprintf('%s.avi',tline(1:end-4));
if u==1 % ignore testing
train_fnames{iaction}{itr} = tline;
itr = itr + 1;
elseif u==2
test_fnames{iaction}{ite} = tline;
ite = ite + 1;
end
end
fclose(fid);
end