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orb 音标拼音: ['ɔrb] n. 球,天体,圆形物
vt. 弄圆,成球形,围着 球,天体,圆形物弄圆,成球形,围着 orb n 1: the ball- shaped capsule containing the vertebrate eye [ synonym: { eyeball}, { orb}] 2: an object with a spherical shape; " a ball of fire" [ synonym: { ball}, { globe}, { orb}] v 1: move in an orbit; " The moon orbits around the Earth"; " The planets are orbiting the sun"; " electrons orbit the nucleus" [ synonym: { orb}, { orbit}, { revolve}] Orb \ Orb\ ([^ o] rb), n. [ OF. orb blind, fr. L. orbus destitute.] ( Arch.) A blank window or panel. [ Obs.] -- Oxf. Gloss. [ 1913 Webster]
Orb \ Orb\, n. [ F. orbe, fr. L. orbis circle, orb. Cf. { Orbit}.] [ 1913 Webster] 1. A spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star. [ 1913 Webster] In the small orb of one particular tear. -- Shak. [ 1913 Webster] Whether the prime orb, Incredible how swift, had thither rolled. -- Milton. [ 1913 Webster] 2. One of the azure transparent spheres conceived by the ancients to be inclosed one within another, and to carry the heavenly bodies in their revolutions. [ 1913 Webster] 3. A circle; esp., a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit. [ 1913 Webster] The schoolmen were like astronomers, which did feign eccentrics, and epicycles, and such engines of orbs. -- Bacon. [ 1913 Webster] You seem to me as Dian in her orb. -- Shak. [ 1913 Webster] In orbs Of circuit inexpressible they stood, Orb within orb. -- Milton. [ 1913 Webster] 4. A period of time marked off by the revolution of a heavenly body. [ R.] -- Milton. [ 1913 Webster] 5. The eye, as luminous and spherical. [ Poetic] [ 1913 Webster] A drop serene hath quenched their orbs. -- Milton. [ 1913 Webster] 6. A revolving circular body; a wheel. [ Poetic] [ 1913 Webster] The orbs Of his fierce chariot rolled. -- Milton. [ 1913 Webster] 7. A sphere of action or influence. -- Wordsworth. [ 1913 Webster] But in our orbs we' ll live so round and safe. -- Shak [ 1913 Webster] 8. Same as { Mound}, a ball or globe. See 1st { Mound}. [ 1913 Webster] 9. ( Mil.) A body of soldiers drawn up in a circle, as for defense, esp. infantry to repel cavalry. [ 1913 Webster] Syn: Globe; ball; sphere. See { Globe}. [ 1913 Webster]
Orb \ Orb\ ([^ o] rb), v. t. [ imp. & p. p. { Orbed} ([^ o] rbd); p. pr. & vb. n. { Orbing}.] 1. To form into an orb or circle. [ Poetic] -- Milton. -- Lowell. [ 1913 Webster] 2. To encircle; to surround; to inclose. [ Poetic] [ 1913 Webster] The wheels were orbed with gold. -- Addison. [ 1913 Webster]
Orb \ Orb\, v. i. To become round like an orb. [ Poetic] [ 1913 Webster] And orb into the perfect star. -- Tennyson. [ 1913 Webster] 133 Moby Thesaurus words for " orb": Aldebaran, Canicula, Dog Star, Hesper, Hesperus, Lucifer, North Star, Phosphor, Phosphorus, Polaris, Sirius, Venus, Vesper, ambit, area, arena, baby blues, bailiwick, ball, balloon, banjo eyes, beat, bladder, blob, boll, bolus, border, borderland, bright eyes, bubble, bulb, bulbil, bulblet, cap of dignity, cap of maintenance, celestial body, circle, circuit, clear eyes, comet, cornea, coronet, crown, daystar, demesne, department, diadem, discipline, domain, dominion, ellipsoid, ermine, evening star, eye, eyeball, eyelid, field, fixed stars, geoid, globe, globelet, globoid, globule, glomerulus, gob, gobbet, goggle eyes, great seal, heavenly body, hemisphere, iris, judicial circuit, jurisdiction, knob, knot, lamp, lens, lid, living sapphires, lodestar, march, morning star, naked eye, nictitating membrane, oblate spheroid, ocular, oculus, optic, optic nerve, orbit, orblet, organ of vision, pale, peeper, pellet, polar star, polestar, popeyes, precinct, privy seal, prolate spheroid, province, pupil, purple, purple pall, realm, regalia, retina, robe of state, rod, rod of empire, rondure, round, royal crown, saucer eyes, scepter, sclera, seal, signet, sphere, spheroid, spherule, starry host, starry orbs, stars, subdiscipline, tiara, triple plume, unaided eye, uraeus, visual organ, walk, winker |
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ORB-SLAM的最大硬伤就是它用的是ORB特征。 ORB特征除了性能好一些,在各类任务上都没什么优势。 不知道有多少研究者仔细测试和比较过,其实传统特征描述子最好的还是SIFT(而且专利也到期了),后来的没一个能打的。 但SIFT检测开销大也是众所周知的。
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以下是关于orb、sphere、ball和globe这四个表示"球体"的英语单词的具体区别的详细分析: • ball 日常生活中最常用的词汇,主要指各种具体的球形物体,而不是抽象的几何概念。 通常指实心的、具体的球状物体,比如篮球、足球、棒球等体育用品。 也可以指不规则的团状物,如线团(a ball of string wool
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我只研究过单目ORB-SLAM2,个人认为使用单目的orb-SLAM很难建立稠密的地图,若是建立稠密的地图,需要更改它的特征点 提取方法,虽然他的orb特征点提取的方法是改进的方法,使得特征点分布的更加均匀,但是依然不够稠密的程度,若是想在orb-slam上进行稠密的三位建图,建议在此基础上加上半稠密
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