Skip to content

added IG metric #5

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
dberga wants to merge 2 commits into
base: master
Choose a base branch
from
Open

added IG metric #5

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
7e3c1d3
added IG metric
dberga May 27, 2016
ab4936d
Update IG.m
dberga Feb 16, 2017
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
31 changes: 31 additions & 0 deletions code_forMetrics/IG.m
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,31 @@
% created: David Berga, May 2016

% This finds the Information Gain between a saliency map and the ground
% truth fixation map.
% It is a non-symmetric measure of the information gain when saliencyMap
% is used to estimate fixationMap by substracting a baseline map,
% which is the averaged the ground truth fixation maps of all other images


function [score,map] = IG(saliencyMap, fixationMap, baselineMap)
% saliencyMap is the saliency map
% fixationMap is the binary human fixation map
% baselineMap is the saliency mean from other human fixation maps

map1 = im2double(imresize(saliencyMap, size(fixationMap)));
map2 = im2double(fixationMap);
map3 = im2double(imresize(baselineMap, size(fixationMap)));

% make sure map1 and map3 sum to 1
if any(map1(:))
map1 = map1/sum(map1(:));
end

if any(map3(:))
map3 = map3/sum(map3(:));
end

% compute IG
score = mean(nonzeros(map2 .* (log2(eps + map1) - log2(eps+map3))));
map = map2 .* (log2(eps + map1) - log2(eps+map3));