person-re-ranking/evaluation/utils/compute_AP_multiCam.m

90 lines
2.4 KiB
Matlab

function ap_multi = compute_AP_multiCam(good_image, junk_image, index, queryCam, testCam)
good_cam = testCam(good_image);
good_cam_uni = unique(good_cam);
ap_multi = zeros(1, 6);
% on the same camera
good_cam_now = queryCam;
ngood = length(junk_image)-1;
junk_image_now = [good_image; index(1)];
good_image_now = setdiff(junk_image, index(1));
old_recall = 0;
old_precision = 1.0;
ap = 0;
intersect_size = 0;
j = 0;
good_now = 0;
for n = 1:length(index)
flag = 0;
if ~isempty(find(good_image_now == index(n), 1))
flag = 1; % good image
good_now = good_now+1;
end
if ~isempty(find(junk_image_now == index(n), 1))
continue; % junk image
end
if flag == 1%good
intersect_size = intersect_size + 1;
end
if ngood == 0
ap_multi(good_cam_now) = 0;
break;
end
recall = intersect_size/ngood;
precision = intersect_size/(j + 1);
ap = ap + (recall - old_recall)*((old_precision+precision)/2);
old_recall = recall;
old_precision = precision;
j = j+1;
if good_now == ngood
ap_multi(good_cam_now) = ap;
break;
end
end
for k = 1:length(good_cam_uni)
good_cam_now = good_cam_uni(k);
ngood = length(find(good_cam == good_cam_now));
pos_junk = find(good_cam ~= good_cam_now);
junk_image_now = [junk_image; good_image(pos_junk)];
pos_good = find(good_cam == good_cam_now);
good_image_now = good_image(pos_good);
old_recall = 0;
old_precision = 1.0;
ap = 0;
intersect_size = 0;
j = 0;
good_now = 0;
for n = 1:length(index)
flag = 0;
if ~isempty(find(good_image_now == index(n), 1))
flag = 1; % good image
good_now = good_now+1;
end
if ~isempty(find(junk_image_now == index(n), 1))
continue; % junk image
end
if flag == 1%good
intersect_size = intersect_size + 1;
end
recall = intersect_size/ngood;
precision = intersect_size/(j + 1);
ap = ap + (recall - old_recall)*((old_precision+precision)/2);
old_recall = recall;
old_precision = precision;
j = j+1;
if good_now == ngood
ap_multi(good_cam_now) = ap;
break;
end
end
end
end