File size: 3,524 Bytes
d4035c1 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | function [conf, jobId] = bk_calcKernels(conf, varargin)
% BK_CALCKERNELS Compute kerenel matrices
% Author:: Andrea Vedaldi
% AUTORIGHTS
% Copyright (C) 2008-09 Andrea Vedaldi
%
% This file is part of the VGG MKL Class and VGG MKL Det code packages,
% available in the terms of the GNU General Public License version 2.
conf_.histDir = '' ;
conf_.testHistDir = '' ;
conf_.kerDir = '' ;
conf_.kerDb = struct ;
conf_.kerDescrDir = '' ;
conf_.noClobber = false ;
if nargin < 1, conf = conf_ ; return ; end
conf = override(conf_, conf) ;
[jobId, taskId] = parallelDriver(varargin{:}, 'numNodes', length(conf.kerDb)) ;
if ~isnan(jobId) & isnan(taskId) ; return ; end
ensuredir(conf.kerDir) ;
for ki = 1:length(conf.kerDb)
% try to lock the kernel
locked = parallelLock(ki, varargin{:}) ;
if ~locked, continue ; end
ker = conf.kerDb(ki) ;
fprintf('Calculating kernel ''%s''.\n', ker.name) ;
if isempty(conf.testHistDir)
% ------------------------------------------------------------------
% Kernel on train-train
% ------------------------------------------------------------------
% no clobber logic
kerPath = fullfile(conf.kerDir, ker.name) ;
if conf.noClobber & checkFile(kerPath)
fprintf('\tSkipping to avoid clobbering ''%s''.\n', kerPath) ;
continue ;
end
% load histograms
histPath = fullfile(conf.histDir, ['hist-' ker.histName]) ;
fprintf('\tLoading ''%s''.\n', histPath) ;
hists = load(histPath) ;
hists = hists.hists ;
% compute kernel
ker = calcKernel(ker, hists) ;
% save
kerPath = fullfile(conf.kerDir, ker.name) ;
fprintf('\tSaving kernel ''%s''.\n', kerPath) ;
ssave(kerPath, '-STRUCT', 'ker', '-v7.3') ;
ker = rmfield(ker, 'matrix') ;
% optionally save the kernel descriptor (includes gamma for the RBF)
if ~isempty(conf.kerDescrDir)
kerDescrPath = fullfile(conf.kerDir, ['descr-' ker.name]) ;
fprintf('\tSaving kernel descriptor ''%s''.\n', kerDescrPath) ;
ssave(kerDescrPath, '-STRUCT', 'ker', '-v7.3') ;
end
else
% ------------------------------------------------------------------
% Kernel on train-test
% -----------------------------------------------------------------
kerPath = fullfile(conf.kerDir, ['test-' ker.name]) ;
if conf.noClobber & checkFile(kerPath)
fprintf('\tSkipping to avoid clobbering ''%s''.\n', kerPath) ;
continue ;
end
% load hisstograms
histPath = fullfile(conf.histDir, ['hist-' ker.histName]) ;
fprintf('\tLoading ''%s''.\n', histPath) ;
hists = load(histPath) ;
hists = hists.hists ;
testHistPath = fullfile(conf.testHistDir, ['hist-' ker.histName]) ;
fprintf('\tLoading ''%s''.\n', testHistPath) ;
testHists = load(testHistPath) ;
testHists = testHists.hists ;
% try to load the descriptor (to get variable kernel parameters such
% as gamma for the RBF).
if ~isempty(conf.kerDescrDir)
kerDescrPath = fullfile(conf.kerDescrDir, ['descr-' ker.name]) ;
fprintf('\tLoading kernel descriptor ''%s''.\n', kerDescrPath) ;
ker = load(kerDescrPath) ;
end
% compute kernel
testKer = calcKernel(ker, hists, testHists) ;
% save
kerPath = fullfile(conf.kerDir, ['test-' ker.name]) ;
fprintf('\tSaving kernel ''%s''.\n', kerPath) ;
ssave(kerPath, '-STRUCT', 'testKer', '-v7.3') ;
end
end
|