def findtubestand_obb(self, tgtpcdnp, toggledebug = False): """ match self.tstpcd from tgtpcdnp NOTE: tgtpcdnp must be in global frame, use getglobalpcd to convert if local :param tgtpcdnp: :return: author: weiwei date: 20191229osaka """ tgtpcdo3d = o3dh.nparray_to_o3dpcd(tgtpcdnp) tgtpcdo3d_removed = o3dh.remove_outlier(tgtpcdo3d, nb_points=50, radius=10) tgtpcdnp = o3dh.o3dpcd_to_parray(tgtpcdo3d_removed) # main axes tgtpcdnp2d = tgtpcdnp[:,:2] # TODO clip using sensor z ca = np.cov(tgtpcdnp2d, y=None, rowvar=0, bias=1) v, vect = np.linalg.eig(ca) tvect = np.transpose(vect) # use the inverse of the eigenvectors as a rotation matrix and # rotate the points so they align with the x and y axes ar = np.dot(tgtpcdnp2d, np.linalg.inv(tvect)) # get the minimum and maximum x and y mina = np.min(ar, axis=0) maxa = np.max(ar, axis=0) diff = (maxa - mina) * 0.5 # the center is just half way between the min and max xy center = mina + diff # get the 4 corners by subtracting and adding half the bounding boxes height and width to the center corners = np.array([center + [-diff[0], -diff[1]], center + [diff[0], -diff[1]], center + [diff[0], diff[1]], center + [-diff[0], diff[1]], center + [-diff[0], -diff[1]]]) # use the the eigenvectors as a rotation matrix and # rotate the corners and the centerback corners = np.dot(corners, tvect) center = np.dot(center, tvect) if toggledebug: import matplotlib.pyplot as plt fig = plt.figure(figsize=(12, 12)) ax = fig.add_subplot(111) ax.scatter(tgtpcdnp2d[:, 0], tgtpcdnp2d[:, 1]) ax.scatter([center[0]], [center[1]]) ax.plot(corners[:, 0], corners[:, 1], '-') plt.axis('equal') plt.show() axind = np.argsort(v) homomat = np.eye(4) homomat[:3,axind[0]] = np.array([vect[0,0], vect[1,0], 0]) homomat[:3,axind[1]] = np.array([vect[0,1], vect[1,1], 0]) homomat[:3,2] = np.array([0,0,1]) if np.cross(homomat[:3,0], homomat[:3,1])[2] < -.5: homomat[:3,1] = -homomat[:3,1] homomat[:3, 3] = np.array([center[0], center[1], -15]) return homomat
def capturecorrectedpcd(self, pxc, ncapturetimes=1, id=1): """ capture a poind cloud and transform it from its sensor frame to global frame :param pcdnp: :return: author: weiwei date: 20200108 """ bgdepth = self.bgdepth1 if id == 2: bgdepth = self.bgdepth2 elif id == 3: bgdepth = self.bgdepth3 elif id == 4: bgdepth = self.bgdepth4 objpcdmerged = None for i in range(ncapturetimes): pxc.triggerframe() fgdepth = pxc.getdepthimg() fgpcd = pxc.getpcd() substracteddepth = bgdepth - fgdepth substracteddepth = substracteddepth.clip(50, 600) substracteddepth[substracteddepth == 50] = 0 substracteddepth[substracteddepth == 600] = 0 substracteddepth[:100, :] = 0 # 300, 1700 for high resolution substracteddepth[1000:, :] = 0 substracteddepth[:, :100] = 0 substracteddepth[:, 1000:] = 0 tempdepth = substracteddepth.flatten() objpcd = fgpcd[np.nonzero(tempdepth)] objpcd = self.getcorrectedpcd(objpcd) if objpcdmerged is None: objpcdmerged = objpcd else: objpcdmerged = np.vstack((objpcdmerged, objpcd)) tgtpcdo3d = o3dh.nparray_to_o3dpcd(objpcdmerged) tgtpcdo3d_removed = o3dh.remove_outlier(tgtpcdo3d, nb_points=50, radius=10) tgtpcdnp = o3dh.o3dpcd_to_parray(tgtpcdo3d_removed) return tgtpcdnp
def findtubes(self, tubestand_homomat, tgtpcdnp, toggledebug=False): """ :param tubestand_homomat: :param tgtpcdnp: :return: """ elearray = np.zeros((5, 10)) eleconfidencearray = np.zeros((5, 10)) tgtpcdo3d = o3dh.nparray_to_o3dpcd(tgtpcdnp) tgtpcdo3d_removed = o3dh.remove_outlier(tgtpcdo3d, downsampling_voxelsize=None, nb_points=90, radius=5) tgtpcdnp = o3dh.o3dpcd_to_parray(tgtpcdo3d_removed) # transform tgtpcdnp back tgtpcdnp_normalized = rm.homotransformpointarray( rm.homoinverse(tubestand_homomat), tgtpcdnp) if toggledebug: cm.CollisionModel(tgtpcdnp_normalized).reparentTo(base.render) tscm2 = cm.CollisionModel("../objects/tubestand.stl") tscm2.reparentTo(base.render) for i in range(5): for j in range(10): holepos = self.tubeholecenters[i][j] # squeeze the hole size by half tmppcd = tgtpcdnp_normalized[ tgtpcdnp_normalized[:, 0] < holepos[0] + self.tubeholesize[0] / 1.9] tmppcd = tmppcd[tmppcd[:, 0] > holepos[0] - self.tubeholesize[0] / 1.9] tmppcd = tmppcd[tmppcd[:, 1] < holepos[1] + self.tubeholesize[1] / 1.9] tmppcd = tmppcd[tmppcd[:, 1] > holepos[1] - self.tubeholesize[1] / 1.9] tmppcd = tmppcd[tmppcd[:, 2] > 70] if len(tmppcd) > 100: print( "------more than 100 raw points, start a new test------" ) # use core tmppcd to decide tube types (avoid noises) coretmppcd = tmppcd[tmppcd[:, 0] < holepos[0] + self.tubeholesize[0] / 4] coretmppcd = coretmppcd[coretmppcd[:, 0] > holepos[0] - self.tubeholesize[0] / 4] coretmppcd = coretmppcd[coretmppcd[:, 1] < holepos[1] + self.tubeholesize[1] / 4] coretmppcd = coretmppcd[coretmppcd[:, 1] > holepos[1] - self.tubeholesize[1] / 4] print("testing the number of core points...") print(len(coretmppcd[:, 2])) if len(coretmppcd[:, 2]) < 10: print("------the new test is done------") continue if np.max(tmppcd[:, 2]) > 100: candidatetype = 1 tmppcd = tmppcd[tmppcd[:, 2] > 100] # crop tmppcd for better charge else: candidatetype = 2 tmppcd = tmppcd[tmppcd[:, 2] < 90] if len(tmppcd) < 10: continue print("passed the core points test, rotate around...") rejflag = False for angle in np.linspace(0, 180, 20): tmphomomat = np.eye(4) tmphomomat[:3, :3] = rm.rodrigues( tubestand_homomat[:3, 2], angle) newtmppcd = rm.homotransformpointarray( tmphomomat, tmppcd) minstd = np.min(np.std(newtmppcd[:, :2], axis=0)) print(minstd) if minstd < 1.3: rejflag = True print("rotate round done") if rejflag: continue else: tmpangles = np.arctan2(tmppcd[:, 1], tmppcd[:, 0]) tmpangles[ tmpangles < 0] = 360 + tmpangles[tmpangles < 0] print(np.std(tmpangles)) print("ACCEPTED! ID: ", i, j) elearray[i][j] = candidatetype eleconfidencearray[i][j] = 1 if toggledebug: # normalized objnp = p3dh.genpointcloudnodepath(tmppcd, pntsize=5) rgb = np.random.rand(3) objnp.setColor(rgb[0], rgb[1], rgb[2], 1) objnp.reparentTo(base.render) stick = p3dh.gendumbbell( spos=np.array([holepos[0], holepos[1], 10]), epos=np.array([holepos[0], holepos[1], 60])) stick.setColor(rgb[0], rgb[1], rgb[2], 1) stick.reparentTo(base.render) # original tmppcd_tr = rm.homotransformpointarray( tubestand_homomat, tmppcd) objnp_tr = p3dh.genpointcloudnodepath(tmppcd_tr, pntsize=5) objnp_tr.setColor(rgb[0], rgb[1], rgb[2], 1) objnp_tr.reparentTo(base.render) spos_tr = rm.homotransformpoint( tubestand_homomat, np.array([holepos[0], holepos[1], 0])) stick_tr = p3dh.gendumbbell( spos=np.array([spos_tr[0], spos_tr[1], 10]), epos=np.array([spos_tr[0], spos_tr[1], 60])) stick_tr.setColor(rgb[0], rgb[1], rgb[2], 1) stick_tr.reparentTo(base.render) # box normalized center, bounds = rm.get_aabb(tmppcd) boxextent = np.array([ bounds[0, 1] - bounds[0, 0], bounds[1, 1] - bounds[1, 0], bounds[2, 1] - bounds[2, 0] ]) boxhomomat = np.eye(4) boxhomomat[:3, 3] = center box = p3dh.genbox(extent=boxextent, homomat=boxhomomat, rgba=np.array( [rgb[0], rgb[1], rgb[2], .3])) box.reparentTo(base.render) # box original center_r = rm.homotransformpoint( tubestand_homomat, center) boxhomomat_tr = copy.deepcopy(tubestand_homomat) boxhomomat_tr[:3, 3] = center_r box_tr = p3dh.genbox(extent=boxextent, homomat=boxhomomat_tr, rgba=np.array( [rgb[0], rgb[1], rgb[2], .3])) box_tr.reparentTo(base.render) print("------the new test is done------") return elearray, eleconfidencearray