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Lts ldy #22

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4f4c570
Delete code that is not related to this branch
danyang123 Mar 4, 2019
502479b
extract the fish and scatter the bary center and tail
danyang123 Mar 4, 2019
8d7d9c0
remove 'removeLargeArea' and create a new folder '3rdPartyLibs'
danyang123 Mar 4, 2019
0b7dcc5
Modify variables and function naming
danyang123 Mar 4, 2019
4852705
add function that get angle between vector "head-centroids" and vecto…
danyang123 Mar 18, 2019
1f541b3
add function that get angle between vector "head-centroids" and vecto…
danyang123 Mar 18, 2019
ee11613
Basic functions have been implemented.TODO：1.optimization；2.add labels
danyang123 May 23, 2019
217639e
conflict
danyang123 May 23, 2019
6de8c0b
Merge branch'LTS-ldy'of https://github.com/Wenlab/ABLITZER into LTS-ldy
danyang123 May 23, 2019
74ccd89
schematic diagram
danyang123 May 23, 2019
079ce5d
Add files via upload
danyang123 Sep 29, 2019
4d2875b
update
danyang123 Oct 6, 2019
03153cf
Merge branch 'LTS-ldy' of https://github.com/Wenlab/ABLITZER into LTS…
danyang123 Oct 6, 2019
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63 changes: 63 additions & 0 deletions 3rdPartyLibs/minBoundingBox.m
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function bb = minBoundingBox(X)
% compute the minimum bounding box of a set of 2D points
% Use: boundingBox = minBoundingBox(point_matrix)
%
% Input: 2xn matrix containing the [x,y] coordinates of n points
% *** there must be at least 3 points which are not collinear
% output: 2x4 matrix containing the coordinates of the bounding box corners
%
% Example : generate a random set of point in a randomly rotated rectangle
% n = 50000;
% t = pi*rand(1);
% X = [cos(t) -sin(t) ; sin(t) cos(t)]*[7 0; 0 2]*rand(2,n);
% X = [X 20*(rand(2,1)-0.5)]; % add an outlier
%
% tic
% c = minBoundingBox(X);
% toc
%
% figure(42);
% hold off, plot(X(1,:),X(2,:),'.')
% hold on, plot(c(1,[1:end 1]),c(2,[1:end 1]),'r')
% axis equal

% compute the convex hull (CH is a 2*k matrix subset of X)
k = convhull(X(1,:),X(2,:));
CH = X(:,k);

% compute the angle to test, which are the angle of the CH edges as:
% "one side of the bounding box contains an edge of the convex hull"
E = diff(CH,1,2); % CH edges
T = atan2(E(2,:),E(1,:)); % angle of CH edges (used for rotation)
T = unique(mod(T,pi/2)); % reduced to the unique set of first quadrant angles

% create rotation matrix which contains
% the 2x2 rotation matrices for *all* angles in T
% R is a 2n*2 matrix
R = cos( reshape(repmat(T,2,2),2*length(T),2) ... % duplicate angles in T
+ repmat([0 -pi ; pi 0]/2,length(T),1)); % shift angle to convert sine in cosine

% rotate CH by all angles
RCH = R*CH;

% compute border size [w1;h1;w2;h2;....;wn;hn]
% and area of bounding box for all possible edges
bsize = max(RCH,[],2) - min(RCH,[],2);
area = prod(reshape(bsize,2,length(bsize)/2));

% find minimal area, thus the index of the angle in T
[a,i] = min(area);

% compute the bound (min and max) on the rotated frame
Rf = R(2*i+[-1 0],:); % rotated frame
bound = Rf * CH; % project CH on the rotated frame
bmin = min(bound,[],2);
bmax = max(bound,[],2);

% compute the corner of the bounding box
Rf = Rf';
bb(:,4) = bmax(1)*Rf(:,1) + bmin(2)*Rf(:,2);
bb(:,1) = bmin(1)*Rf(:,1) + bmin(2)*Rf(:,2);
bb(:,2) = bmin(1)*Rf(:,1) + bmax(2)*Rf(:,2);
bb(:,3) = bmax(1)*Rf(:,1) + bmax(2)*Rf(:,2);

100 changes: 0 additions & 100 deletions @ABLITZER/ABLITZER.m
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71 changes: 0 additions & 71 deletions @ABLITZER/classifyFish.m
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42 changes: 0 additions & 42 deletions @ABLITZER/findFish.m
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34 changes: 0 additions & 34 deletions @ABLITZER/findLearners.m
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64 changes: 0 additions & 64 deletions @ABLITZER/histPlotMemLen.m
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