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Optimization.m
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Optimization.m
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function [stitchtime,optimal_time]=Optimization(new_obj_struct,newerobjects,frame_group)
tic;
object_num=newerobjects(end,1);
groupnum=numel(new_obj_struct);
frame_group_num=size(frame_group,1);
tmpobj=newerobjects(:,[1:6,9]); %record the temporary test time of each object
%the max single tube duration
maxduration=0;
for i=1:groupnum
duration=new_obj_struct(i).duration;
tmpmax_duration=max(duration);
if(maxduration<tmpmax_duration)
maxduration=tmpmax_duration;
end
end
stitchtime=zeros(object_num+frame_group_num,maxduration); %record the time position of each object
optimal_time=zeros(groupnum,1);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%the initialization of the first group
optimal_time(1)=1; %the first group is placed on the first position
member=new_obj_struct(1).memberId;
start_time=new_obj_struct(1).start_time;
duration=new_obj_struct(1).duration;
member_type=new_obj_struct(1).member_type;
member_num=new_obj_struct(1).memberNum;
time=zeros(member_num,1);
time(1)=optimal_time(1);
detail_time=time(1):time(1)+duration(1)-1;
stitchtime(member(1),1:duration(1))=detail_time;
tmpobj(tmpobj(:,1)==member(1),2)=detail_time;
if(member_num>1)
for j=2:member_num
lasttime=start_time(j-1);
curtime=start_time(j);
time(j)=time(j-1)+curtime-lasttime;
if(member_type(j)==0)
detail_time=time(j):time(j)+duration(j)-1;
stitchtime(member(j),1:duration(j))=detail_time;
else
original_rows=find(newerobjects(:,1)==member(j));
original_time=newerobjects(original_rows,11);
original_start_time=original_time(1);
delta_t=original_start_time-time(j);
detail_time=original_time-delta_t;
stitchtime(member(j),1:duration(j))=detail_time;
tmpobj(original_rows,2)=detail_time;
end
end
end
current_stitch_time=new_obj_struct(1).group_duration+1;
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Optimization
for i=2:groupnum
disp(['group: ',num2str(i)]);
%basic information of group i
member=new_obj_struct(i).memberId;
start_time=new_obj_struct(i).start_time;
duration=new_obj_struct(i).duration;
member_type=new_obj_struct(i).member_type;
member_num=new_obj_struct(i).memberNum;
tmpstitchtime=zeros(member_num,max(duration));
%find a proper time position of the current group from the beginning to
%current_stitch_time
for j=1:3:current_stitch_time
[cur_stitch,~]=find(stitchtime==j); % the current stitched object in the test frame
cur_stitch=unique(cur_stitch);
cur_stitch_num=numel(cur_stitch);
if(cur_stitch_num>10)
continue;
end
optimal_time(i)=j; % the test time position
time=zeros(member_num,1);
time(1)=optimal_time(i); %the time position of the first member of group i
detail_time=time(1):time(1)+duration(1)-1;
tmpstitchtime(1,1:duration(1))=detail_time;
tmpobj(tmpobj(:,1)==member(1),2)=detail_time;
%set time positions for other members of group i
if(member_num>1)
for k=2:member_num
lasttime=start_time(k-1);
curtime=start_time(k);
time(k)=time(k-1)+curtime-lasttime;
if(member_type(k)==0)
detail_time=time(k):time(k)+duration(k)-1;
tmpstitchtime(k,1:duration(k))=detail_time;
else
original_time=newerobjects(newerobjects(:,1)==member(k),11);
original_start_time=original_time(1);
delta_t=original_start_time-time(k);
detail_time=original_time-delta_t;
tmpstitchtime(k,1:duration(k))=detail_time;
tmpobj(tmpobj(:,1)==member(k),2)=detail_time;
end
end
end
%calculate collision
collision=0;
collision_threshold=25*(floor(member_num/10)+1); %collision threshold
too_collision=false;
for z=1:member_num
z_test_time=tmpstitchtime(z,:); %the test time of the current member
z_test_time(z_test_time==0)=[]; %remove the 0 element
% find objects that have common stitch time with the current
% member
[r,~]=find(stitchtime>=z_test_time(1) & stitchtime<=z_test_time(end));
r=unique(r);
r_num=numel(r);
for e=1:r_num
r_stitchtime=stitchtime(r(e),:);
r_stitchtime(r_stitchtime==0)=[];
intersect_time=intersect(z_test_time,r_stitchtime);
intersect_time_num=numel(intersect_time);
if(~isempty(intersect_time)) %is there exists intersect time exactly
if(member_type(z)==1) %member_type(z) represents a tube
rows1=find(tmpobj(:,1)==member(z) & tmpobj(:,2)>=intersect_time(1) & tmpobj(:,2)<=intersect_time(end));
if(r(e)<=object_num) % r(e) is the index of tube object
rows2=find(tmpobj(:,1)==r(e) & tmpobj(:,2)>=intersect_time(1) & tmpobj(:,2)<=intersect_time(end));
rows1_num=numel(rows1);
rows2_num=numel(rows2);
if(rows1_num ~= intersect_time_num || rows2_num ~= intersect_time_num)
rawtime1=tmpobj(rows1,2);
rawtime2=tmpobj(rows2,2);
[~,row_index]=setdiff(rawtime1,intersect_time);
rows1(row_index)=[];
[~,row_index]=setdiff(rawtime2,intersect_time);
rows2(row_index)=[];
% if(rows1_num>rows2_num)
% [~,row_index]=setdiff(rawtime1,rawtime2);
% rows1(row_index)=[];
% else
% [~,row_index]=setdiff(rawtime2,rawtime1);
% rows2(row_index)=[];
% end
end
box1=tmpobj(rows1,3:6);
box2=tmpobj(rows2,3:6);
intersect_box=diag(rectint(box1,box2));
non_zero_num=numel(find(intersect_box ~= 0));
non_zero_num=floor(non_zero_num/12)+1; %convert to seconds, 12 is frame rate
min_area=min(tmpobj(rows1,7),tmpobj(rows2,7));
intersect_box=intersect_box./min_area;
collision=collision+sum(intersect_box)*exp(non_zero_num);
else
rows1_num=numel(rows1);
intersect_seconds=floor(rows1_num/12)+1;
collision=collision+rows1_num*exp(intersect_seconds);
end
if(collision>collision_threshold)
too_collision=true;
break;
end
else % member_type(z) represents a clip
if(r(e)>object_num) % r(e) also represents a clip
too_collision=true;
break;
else
rows2=find(tmpobj(:,1)==r(e) & tmpobj(:,2)>=intersect_time(1) & tmpobj(:,2)<=intersect_time(end));
rows2_num=numel(rows2);
intersect_seconds=floor(rows2_num/12)+1;
collision=collision+rows2_num*exp(intersect_seconds);
if(collision>collision_threshold)
too_collision=true;
break;
end
end
end
end
end
if(too_collision)
break; % if the current frame is too collision, stop in advance
end
end
if(collision<collision_threshold)
stitchtime(member(1),1:duration(1))=tmpstitchtime(1,1:duration(1));
if(member_num>1)
for h=2:member_num
if(member_type(h)==1)
stitchtime(member(h),1:duration(h))=tmpstitchtime(h,1:duration(h));
else
stitchtime(member(h),1:duration(h))=tmpstitchtime(h,1:duration(h));
end
end
end
current_stitch_time=max(max(stitchtime))+1;
break; %the optimal stitch time of group i has been found, stop in advance
end
end
end
toc;