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Commit 40ab280c authored by Oleg Dzhimiev's avatar Oleg Dzhimiev
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Gauss-Newton algorithm to align heading and lat,lng

parent 05a68386
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js/ui_align.js
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......@@ -14,6 +14,20 @@ function align_init(){
}
function test_markers_set1(){
Data.camera.kml.latitude = 40.7233861;
Data.camera.kml.longitude = -111.9328843;
Data.camera.kml.heading = 62;
Data.markers = [
{align:{ latitude: 40.72362633635111, longitude: -111.93257600069047, x:-9.079290749776595, y:-14.27794573338788, z: -32.46383785654424 }},
{align:{ latitude: 40.7234408473505, longitude: -111.93217568099502, x:23.90413018819188, y:-16.192438967265613, z: -53.91987886096472 }},
{align:{ latitude: 40.7239048229759, longitude: -111.93186186254026, x:-8.800276069589225, y:-17.382935178801347, z:-100.34033327103612 }}
];
}
function x3dom_align_0(){
//get all points
......@@ -22,33 +36,452 @@ function x3dom_align_0(){
//console.log("Markers");
//console.log(Data.markers);
var base = Data.camera;
//test_markers_set1();
//var base = Data.camera;
// base.x
// base.y
// base.z
// base.latitude
// base.longitude
//initial?
var x0 = Data.camera.kml.latitude;
var y0 = Data.camera.kml.longitude;
var h0 = Data.camera.kml.heading;
//tests
//test_AxB();
//test_At();
//test_AxV();
//test_Ainv();
//return -1;
/*
console.log("Initial approximation: "+x0+" "+y0+" "+h0);
for(var i=0;i<Data.markers.length;i++){
console.log("Marker "+i+": "+Data.markers[i].align.latitude+" "+Data.markers[i].align.longitude+" "+Data.markers[i].align.x+" "+Data.markers[i].align.y+" "+Data.markers[i].align.z);
//console.log(f1_3d_i(i,x0,y0,h0)+" - "+f2_map_i(i,x0,y0,h0)+" = "+r_i(i,x0,y0,h0)+" also, final bearing: "+f2_map_i_inverse(i,x0,y0,h0));
//console.log(f1_3d_i(i,x0,y0,h0)+" - "+f2_map_i(i,x0,y0,h0)+" = "+r_i(i,x0,y0,h0));
}
*/
/*
for(var i=0;i<Data.markers.length;i++){
//console.log(Data.markers[i].align.latitude+" "+Data.markers[i].align.longitude+" "+Data.markers[i].align.x+" "+Data.markers[i].align.y+" "+Data.markers[i].align.z);
//console.log(f1_3d_i(i,x0,y0,h0)+" - "+f2_map_i(i,x0,y0,h0)+" = "+r_i(i,x0,y0,h0)+" also, final bearing: "+f2_map_i_inverse(i,x0,y0,h0));
console.log(f1_3d_i(i,x0,y0,h0)+" - "+f2_map_i(i,x0,y0,h0)+" = "+r_i(i,x0,y0,h0));
}
console.log("Begin");
*/
var ε = 0.0000000001;
var iterate = true;
var counter = 0;
var result = 0;
var xyh = [x0,y0,h0];
//console.log("Iteration 0, initial: "+xyh[0]+" "+xyh[1]+" "+xyh[2]);
//console.log("Error function value: "+sigma(xyh[0],xyh[1],xyh[2]));
while(iterate){
counter++;
//console.log("Interation: "+counter+" for "+xyh[0]+" "+xyh[1]+" "+xyh[2]);
xyh_new = GaussNewtonAlgorithm(xyh[0],xyh[1],xyh[2]);
//console.log(xyh_new);
var s0 = sigma(xyh[0],xyh[1],xyh[2]);
var s1 = sigma(xyh_new[0],xyh_new[1],xyh_new[2]);
//if ((s1>s0)||((s0-s1)<ε)){
if (Math.abs(s0-s1)<ε){
iterate = false;
}
//console.log("Errors: "+(xyh_new[0]-xyh[0])+" "+(xyh_new[1]-xyh[1])+" "+(xyh_new[2]-xyh[2]));
//console.log("Iteration "+counter+" result: "+xyh_new[0]+" "+xyh_new[1]+" "+xyh_new[2]);
//console.log("Error function value: "+sigma(xyh_new[0],xyh_new[1],xyh_new[2]));
if (counter==150){
iterate = false;
}
xyh[0] = xyh_new[0];
xyh[1] = xyh_new[1];
xyh[2] = xyh_new[2];
}
}
function sigma(x,y,h){
var sum = 0
for(var i=0;i<Data.markers.length;i++){
sum += r_i(i,x,y,h)*r_i(i,x,y,h);
}
sum = Math.sqrt(sum/Data.markers.length);
return sum;
}
function GaussNewtonAlgorithm(x,y,h){
var J = Jacobian(x,y,h);
var Jt = At(J);
//console.log(J);
//console.log(Jt);
var JtJ = AxB(Jt,J);
//console.log(JtJ);
//console.log("Determinant: "+Adet(JtJ));
var JtJi = Ainv(JtJ);
//console.log(AxB(JtJ,JtJi));
var JtJixJt = AxB(JtJi,Jt);
// console.log(J);
// console.log(JtJ);
// console.log(JtJi);
// console.log("testing JtJ x JtJ_inv");
// console.log(AxB(JtJi,JtJ));
// console.log(AxB(JtJ,JtJi));
// console.log(Jt);
// console.log(JtJixJt);
//console.log("JtJixJt");
//console.log(JtJixJt);
var Vr = [];
for(var i=0;i<Data.markers.length;i++){
Vr[i] = r_i(i,x,y,h);
}
//console.log("Vr");
//console.log(Vr);
//console.log("Vr");
//console.log(Vr);
var d = AxV(JtJixJt,Vr);
//console.log("JtJixJt x Vr");
//console.log(d);
//var k = 1/10;
var k = 1;
return [x-k*d[0], y-k*d[1], h-k*d[2]];
}
function f1_3d_i(i,x,y,h){
var base = Data.camera;
var mark = Data.markers[i];
var v = new x3dom.fields.SFVec3f(mark.align.x-base.x,0,mark.align.z-base.z);
var res = Math.atan2(v.x,-v.z)*180/Math.PI + h;
return res;
}
function f2_map_i(i,x,y,h){
var mark = Data.markers[i];
var p1_ll = new L.LatLng(x,y);
var p2_ll = new L.LatLng(mark.align.latitude,mark.align.longitude);
//console.log(p1_ll);
//console.log(p2_ll);
p1_ll.lat = p1_ll.lat*Math.PI/180;
p1_ll.lng = p1_ll.lng*Math.PI/180;
p2_ll.lat = p2_ll.lat*Math.PI/180;
p2_ll.lng = p2_ll.lng*Math.PI/180;
var dlat = p2_ll.lat-p1_ll.lat;
var dlon = p2_ll.lng-p1_ll.lng;
var dy = Math.sin(dlon)*Math.cos(p2_ll.lat);
var dx = Math.cos(p1_ll.lat)*Math.sin(p2_ll.lat)-Math.sin(p1_ll.lat)*Math.cos(p2_ll.lat)*Math.cos(dlon);
//console.log("dy = "+dy+" dx = "+dx);
var res = 180/Math.PI*Math.atan2(dy,dx);
return res;
}
function f2_map_i_inverse(i,x,y,h){
var mark = Data.markers[i];
var p1_ll = new L.LatLng(mark.align.latitude,mark.align.longitude);
var p2_ll = new L.LatLng(x,y);
//console.log(p1_ll);
//console.log(p2_ll);
p1_ll.lat = p1_ll.lat*Math.PI/180;
p1_ll.lng = p1_ll.lng*Math.PI/180;
p2_ll.lat = p2_ll.lat*Math.PI/180;
p2_ll.lng = p2_ll.lng*Math.PI/180;
var dlat = p2_ll.lat-p1_ll.lat;
var dlon = p2_ll.lng-p1_ll.lng;
var dy = Math.sin(dlon)*Math.cos(p2_ll.lat);
var dx = Math.cos(p1_ll.lat)*Math.sin(p2_ll.lat)-Math.sin(p1_ll.lat)*Math.cos(p2_ll.lat)*Math.cos(dlon);
//console.log("dy = "+dy+" dx = "+dx);
var res = 180/Math.PI*Math.atan2(dy,dx);
return res;
}
function r_i(i,x,y,h){
return (f1_3d_i(i,x,y,h)-f2_map_i(i,x,y,h));
}
function dr_dh_i(i,x,y,h){
return 1;
}
function dr_dx_i(i,x,y,h){
var mark = Data.markers[i];
var p1_ll = new L.LatLng(x,y);
var p2_ll = new L.LatLng(mark.align.latitude,mark.align.longitude);
p1_ll.lat = p1_ll.lat*Math.PI/180;
p1_ll.lng = p1_ll.lng*Math.PI/180;
p2_ll.lat = p2_ll.lat*Math.PI/180;
p2_ll.lng = p2_ll.lng*Math.PI/180;
var dlat = p2_ll.lat-p1_ll.lat;
var dlon = p2_ll.lng-p1_ll.lng;
var dy = Math.sin(dlon)*Math.cos(p2_ll.lat);
var dx = Math.cos(p1_ll.lat)*Math.sin(p2_ll.lat)-Math.sin(p1_ll.lat)*Math.cos(p2_ll.lat)*Math.cos(dlon);
var dydx = 0;
var dxdx = (-Math.sin(p1_ll.lat)*Math.sin(p2_ll.lat)-Math.cos(p1_ll.lat)*Math.cos(p2_ll.lat)*Math.cos(dlon))*Math.PI/180;
var Arg = dy/dx;
var res = -180/Math.PI*1/(1+Math.pow(Arg,2))*(-dy*dxdx)/Math.pow(dx,2);
return res;
}
function dr_dy_i(i,x,y,h){
var mark = Data.markers[i];
var p1_ll = new L.LatLng(x,y);
var p2_ll = new L.LatLng(mark.align.latitude,mark.align.longitude);
p1_ll.lat = p1_ll.lat*Math.PI/180;
p1_ll.lng = p1_ll.lng*Math.PI/180;
p2_ll.lat = p2_ll.lat*Math.PI/180;
p2_ll.lng = p2_ll.lng*Math.PI/180;
var dlat = p2_ll.lat-p1_ll.lat;
var dlon = p2_ll.lng-p1_ll.lng;
var dy = Math.sin(dlon)*Math.cos(p2_ll.lat);
var dx = Math.cos(p1_ll.lat)*Math.sin(p2_ll.lat)-Math.sin(p1_ll.lat)*Math.cos(p2_ll.lat)*Math.cos(dlon);
var dydy = Math.cos(p2_ll.lat)*Math.cos(dlon)*(-1)*Math.PI/180;
var dxdy = -Math.sin(p1_ll.lat)*Math.cos(p2_ll.lat)*(-1)*Math.sin(dlon)*(-1)*Math.PI/180;
var Arg = dy/dx;
var res = -180/Math.PI*1/(1+Math.pow(Arg,2))*(dydy*dx-dy*dxdy)/Math.pow(dx,2);
return res;
}
function Jacobian(x,y,h){
var J = [];
var base = Data.camera;
for(var i=0;i<Data.markers.length;i++){
var mark = Data.markers[i];
J[i]=[ dr_dx_i(i,x,y,h), dr_dy_i(i,x,y,h), dr_dh_i(i,x,y,h)];
/*
e0 = 0.000000001;
e1 = 0.000000001;
e2 = 0.00001;
// map azimuth
var p1_ll = new L.LatLng(base.latitude,base.longitude);
var p2_ll = new L.LatLng(mark.align.latitude,mark.align.longitude);
dri_dx_cal = dr_dx_i(i,x,y,h);
dri_dy_cal = dr_dy_i(i,x,y,h);
dri_dh_cal = dr_dh_i(i,x,y,h);
var azimuth_map = getAzimuth(p1_ll,p2_ll);
dri_dx_num = (r_i(i,x+e0,y ,h )-r_i(i,x-e0,y ,h ))/e0/2;
dri_dy_num = (r_i(i,x ,y+e1,h )-r_i(i,x ,y-e1,h ))/e1/2;
dri_dh_num = (r_i(i,x ,y ,h+e2)-r_i(i,x ,y ,h-e2))/e2/2;
//var da = x3dom_getDistAngle(mark.align.x,mark.align.y,mark.align.z);
//var azimuth_3d = da[1];
console.log("CAL: "+dri_dx_cal.toFixed(10)+" "+dri_dy_cal.toFixed(10)+" "+dri_dh_cal.toFixed(4));
console.log("NUM: "+dri_dx_num.toFixed(10)+" "+dri_dy_num.toFixed(10)+" "+dri_dh_num.toFixed(4));
*/
}
return J;
}
var v = new x3dom.fields.SFVec3f(mark.align.x-base.x,mark.align.y-base.y,mark.align.z-base.z);
var azimuth_3d = Math.atan2(v.x,-v.z)*180/Math.PI;
/*
1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1
*/
console.log(azimuth_map+" - "+azimuth_3d+" = "+(azimuth_map-azimuth_3d));
//tested
function AxB(A,B){
//A.length == B[0].length
//A[0].length == B.length
var m1 = A.length;
var n1 = A[0].length;
var m2 = B.length;
var n2 = B[0].length;
if(n1!=m2){
console.log("M=AxB: cannot multiply matrices A_"+m1+"_"+n1+" x B_"+m2+"_"+n2);
return [];
}
var R = [];
for(var i=0;i<m1;i++){
R[i] = [];
for(var j=0;j<n2;j++){
R[i][j] = 0;
for(var k=0;k<n1;k++){
R[i][j] += A[i][k]*B[k][j];
}
}
}
return R;
}
//tested
function Adet(A){
var m = A.length;
var n = A[0].length;
if ((m!=3)||(n!=3)){
console.log("Matrix inverting works only for 3x3 dimension");
}
var M = new x3dom.fields.SFMatrix4f(
A[0][0],A[0][1],A[0][2],0,
A[1][0],A[1][1],A[1][2],0,
A[2][0],A[2][1],A[2][2],0,
0,0,0,1
);
return M.det();
}
//tested
function Ainv(A){
var m = A.length;
var n = A[0].length;
if ((m!=3)||(n!=3)){
console.log("Matrix inverting works only for 3x3 dimension");
}
var M = new x3dom.fields.SFMatrix4f(
A[0][0],A[0][1],A[0][2],0,
A[1][0],A[1][1],A[1][2],0,
A[2][0],A[2][1],A[2][2],0,
0,0,0,1
);
var R = M.inverse();
return [
[R._00,R._01,R._02],
[R._10,R._11,R._12],
[R._20,R._21,R._22]
];
}
//tested
function At(A){
var R = [];
for(var i=0;i<A[0].length;i++){
R[i] = [];
for(var j=0;j<A.length;j++){
R[i][j] = A[j][i];
}
}
return R;
}
//tested
function AxV(A,V){
var Vr = [];
var m1 = A.length;
var n1 = A[0].length;
var m2 = V.length;
var n2 = 1;
if (n1!=m2){
console.log("Matrix or vector dimension errors, too bad");
return [];
}
for(var i=0;i<m1;i++){
Vr[i] = 0;
for(var j=0;j<m2;j++){
Vr[i] += A[i][j]*V[j];
}
}
return Vr;
}
function align_heading(){
......@@ -91,3 +524,90 @@ function align_tilt(){
console.log("tilt");
}
function test_Ainv(){
var A = [
[0,0,1],
[1,0,0],
[0,1,0]
];
console.log(A);
console.log(Ainv(A));
}
function test_AxV(){
var A = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
];
var V1 = [
13,
14,
15,
16
];
var V2 = [
13,
14,
15
];
console.log(AxV(A,V1));
console.log(AxV(A,V2));
}
function test_At(){
console.log("testing At: begin");
var A = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
];
console.log(A);
console.log(At(A));
console.log("testing At: end");
}
function test_AxB(){
console.log("testing AxB: begin");
var A = [
[1,2,3,4],
[5,6,7,8],
[9,10,11,12]
];
var B = [
[13,14,15],
[16,17,18],
[19,20,21],
[22,23,24],
];
var C = [
[2,2],
[1,1]
];
//test1: 3x4 x 4x3 = 3x3
console.log(AxB(A,B));
//test2: fail test case
console.log(AxB(A,C));
console.log("testing AxB: end");
}
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