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2022-08-05 08:23:25 +03:00
commit 5ecdc6abcf
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ov_data/kaist/matlab/kaist_calculate_imu2cam.m Normal file
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clear all;
close all;
% load their stereo parameters
% looks like they used the matlab calibration tool to get it.
% https://www.mathworks.com/help/vision/ref/stereoparameters.html#d117e94134
load ../raw/stereoParams.mat
%stereoParams = toStruct(stereoParams);
% transform between the left (stereo pair base) and the right camera
% the units of the stereo parameters are millimeters
% need to get R_1to2 and p_1in2
R_2to1 = stereoParams.RotationOfCamera2;
p_2in1 = stereoParams.TranslationOfCamera2'/1000;
T_LtoR = [...
R_2to1' p_2in1;
0 0 0 1
];
% T_LtoR = zeros(4,4);
% T_LtoR(1,1) = 1;
% T_LtoR(1,4) = -0.4751;
% T_LtoR(2,2) = 1;
% T_LtoR(3,3) = 1;
% T_LtoR(4,4) = 1;
% Vehicle2Stereo.txt
% Stereo camera (based on left camera) extrinsic calibration parameter from vehicle
% WHAT????? THEIR POSITION IS INCORRECTLY THE OPOSITE
% DIRECTION????!@#!@#?!@#!@#$!@$%!#@%!#%!~@%!@#%@!#^%#@%^!@#%@#%
p_LinV = [1.66944; 0.278027; 1.61215];
R_LtoV = [-0.00413442 -0.0196634 0.999798; -0.999931 -0.0109505 -0.00435034; 0.0110338 -0.999747 -0.0196168];
T_VtoL = [...
R_LtoV' -R_LtoV'*p_LinV;
0 0 0 1
];
% Vehicle2IMU.txt
% IMU extrinsic calibration parameter from vehicle
p_IinV = [-0.07; 0; 1.7];
R_ItoV = [1 0 0; 0 1 0; 0 0 1];
T_VtoI = [...
R_ItoV' -R_ItoV'*p_IinV;
0 0 0 1
];
% calculate the transform between the camneras and the IMU
T_LtoI = T_VtoI*inv(T_VtoL);
T_RtoI = T_VtoI*inv(T_LtoR*T_VtoL);
% print it out
fprintf('T_C0toI = \n');
fprintf('%.5f,%.5f,%.5f,%.5f,\n',T_LtoI(1,1),T_LtoI(1,2),T_LtoI(1,3),T_LtoI(1,4));
fprintf('%.5f,%.5f,%.5f,%.5f,\n',T_LtoI(2,1),T_LtoI(2,2),T_LtoI(2,3),T_LtoI(2,4));
fprintf('%.5f,%.5f,%.5f,%.5f,\n',T_LtoI(3,1),T_LtoI(3,2),T_LtoI(3,3),T_LtoI(3,4));
fprintf('%.5f,%.5f,%.5f,%.5f\n',T_LtoI(4,1),T_LtoI(4,2),T_LtoI(4,3),T_LtoI(4,4));
fprintf('T_C1toI = \n');
fprintf('%.5f,%.5f,%.5f,%.5f,\n',T_RtoI(1,1),T_RtoI(1,2),T_RtoI(1,3),T_RtoI(1,4));
fprintf('%.5f,%.5f,%.5f,%.5f,\n',T_RtoI(2,1),T_RtoI(2,2),T_RtoI(2,3),T_RtoI(2,4));
fprintf('%.5f,%.5f,%.5f,%.5f,\n',T_RtoI(3,1),T_RtoI(3,2),T_RtoI(3,3),T_RtoI(3,4));
fprintf('%.5f,%.5f,%.5f,%.5f\n',T_RtoI(4,1),T_RtoI(4,2),T_RtoI(4,3),T_RtoI(4,4));