VICP｜SLAM 點雲圖鑑

Estimates rangefinder velocity during ICP iterations to compensate scan distortion caused by sequential point acquisition.

技術屬性

欄位內容為文獻擷取紀錄的原文用語（英文），以原文為據；「未查證」表示本研究尚未讀到該資訊，不代表該方法不具備此能力。

VICP 的技術屬性
感測輸入	2D laser rangefinder (Hokuyo URG-04LX, written HOKUYO URG04-LX)
原文測試平台	simulation、cart pushed by a person carrying the rangefinder and a laptop in an office (7.2 m x 7.8 m)
狀態估計	ICP with velocity update
資料關聯	2D point-to-point closest-point ICP solved by SVD (Algorithm 1), with points outside the pie-shaped sensing area of the previous scan rejected as outliers
時間表示	constant velocity within a scan
去畸變	each point transformed with the constant body velocity estimated from the relative ICP transform (backward difference over the scan interval) and re-estimated in an outer loop until the velocity converges; backward compensation uses the last point as reference so the pose is not delayed by the scan time
迴圈閉合	none
全域最佳化	none
地圖表示	不適用
先驗資訊	none
可輸出幾何	2D rangefinder trajectory and motion-compensated scans
計算需求	C++ on a laptop with an Intel dual core 2.0 GHz CPU; total cost grows by less than twice that of ICP because ICP iterations drop as the velocity converges; no timings reported

原文使用的感測器、運算硬體與載具（equipment）。型號保留原文寫法，連結到設備頁中同一型號的歸併名稱；角色依原文用途分為方法輸入、資料集感測器、執行運算平台、參考或真值量測（reference or ground truth）與比較對象設備。

原文使用的設備
類別	型號（原文寫法）	角色	資料集	原文規格	出處
LiDAR	HOKUYO URG04-LX歸入：Hokuyo URG-04LX	方法輸入	未標示	2D laser scanner; 785 nm; accuracy plus or minus 10 mm; resolution 1 mm; scan angle 240 deg; range 4000 mm; angular resolution 0.36 deg; 100 ms per scan; 50 x 50 x 70 mm; the paper spells the model URG04-LX (the vendor spelling is URG-04LX)	(Hong et al., 2010, Table I, Sec. V, VI)
運算硬體	laptop with Intel dual core 2.0 GHz CPU	執行運算平台	未標示	C++ implementation; no timings reported	(Hong et al., 2010, Sec. VI)

Lower return-to-start drift than original ICP in all four office experiments, e.g. 177 mm and 7.28 deg versus 2191 mm and 58.14 deg in experiment 1 (Table II)
Advantage is largest for faster motion (experiment 2 at about 2.7 m/s average: 65 mm versus 2014 mm) (Sec. VI, Table II)
Total computation grows by less than twice that of ICP (Sec. IV-C, Fig. 5)
Backward compensation yields an up-to-date pose (Sec. IV-B)

Assumes constant velocity during one scan (Sec. IV-B)
Convergence of the velocity iteration is observed but not proven (Sec. IV-B)
Real-world accuracy judged only by return-to-start drift because ground truth was unavailable (Sec. VI)
Tested only with a 2D rangefinder, in simulation and in one small office (Sec. V, VI)

原文未報告

原文驗證環境：模擬、已完工建築

以下是原文作者報告的性能數值（author-reported results），不是本研究重新量測的結果。每張圖只並列同一個比較組（comparison group，同一張表、同一組實驗設定）內的方法；不同比較組之間的數值不可直接比較，也不構成排名。

本方法共出現在 1 個比較組，合計 8 筆紀錄。

指標資料集與序列

表格設定（擷取紀錄原文，這些數值分屬表中不同部分）：(Hong et al., 2010, Table II)

Office experiments with cart-carried URG-04LX; drift error on return to the starting point (no ground truth)
Office experiments; return-to-start drift

只並列這張表在相同設定下報告的方法；以「本方法：」開頭者為本頁方法。失敗、未執行與未報告以標記呈現，不是 0。

這些是 Hong et al., 2010 在此表設定下報告的數值（author-reported results），只能在同一個比較組內對照，不代表方法在其他資料或設定下的表現。

統計量：原文未報告；對齊方式：首幀對齊（first-pose）；單位：deg；場景：office room 7.2 m x 7.8 m

資料來源作者報告值(Hong et al., 2010, Table II)

數值與出處
方法（原文寫法）	報告值	出處
Original ICP	58.14 deg	(Hong et al., 2010, Table II)
VICP本方法原文提出	7.28 deg	(Hong et al., 2010, Table II)

Hong et al., 2010
Seungpyo Hong, Heedong Ko, Jinwook Kim（2010）VICP: Velocity updating iterative closest point algorithm2010 IEEE International Conference on Robotics and Automation, pp. 1893-1898
DOI 10.1109/robot.2010.5509312
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