{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T00:33:22Z","timestamp":1760488402462,"version":"build-2065373602"},"reference-count":16,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2010,4,13]],"date-time":"2010-04-13T00:00:00Z","timestamp":1271116800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This paper presents an analytical study of the depth estimation error of a stereo vision-based pedestrian detection sensor for automotive applications such as pedestrian collision avoidance and\/or mitigation. The sensor comprises two synchronized and calibrated low-cost cameras. Pedestrians are detected by combining a 3D clustering method with Support Vector Machine-based (SVM) classification. The influence of the sensor parameters in the stereo quantization errors is analyzed in detail providing a point of reference for choosing the sensor setup according to the application requirements. The sensor is then validated in real experiments. Collision avoidance maneuvers by steering are carried out by manual driving. A real time kinematic differential global positioning system (RTK-DGPS) is used to provide ground truth data corresponding to both the pedestrian and the host vehicle locations. The performed field test provided encouraging results and proved the validity of the proposed sensor for being used in the automotive sector towards applications such as autonomous pedestrian collision avoidance.<\/jats:p>","DOI":"10.3390\/s100403741","type":"journal-article","created":{"date-parts":[[2010,4,13]],"date-time":"2010-04-13T11:15:22Z","timestamp":1271157322000},"page":"3741-3758","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["Error Analysis in a Stereo Vision-Based Pedestrian Detection Sensor for Collision Avoidance Applications"],"prefix":"10.3390","volume":"10","author":[{"given":"David F.","family":"Llorca","sequence":"first","affiliation":[{"name":"Electronics Department, University of Alcal\u00e1, Polytechnic School, University Campus, Alcal\u00e1 de Henares, Madrid 28871, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miguel A.","family":"Sotelo","sequence":"additional","affiliation":[{"name":"Electronics Department, University of Alcal\u00e1, Polytechnic School, University Campus, Alcal\u00e1 de Henares, Madrid 28871, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ignacio","family":"Parra","sequence":"additional","affiliation":[{"name":"Electronics Department, University of Alcal\u00e1, Polytechnic School, University Campus, Alcal\u00e1 de Henares, Madrid 28871, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8875-1866","authenticated-orcid":false,"given":"Manuel","family":"Oca\u00f1a","sequence":"additional","affiliation":[{"name":"Electronics Department, University of Alcal\u00e1, Polytechnic School, University Campus, Alcal\u00e1 de Henares, Madrid 28871, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luis M.","family":"Bergasa","sequence":"additional","affiliation":[{"name":"Electronics Department, University of Alcal\u00e1, Polytechnic School, University Campus, Alcal\u00e1 de Henares, Madrid 28871, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2010,4,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1006\/cviu.1998.0716","article-title":"The visual analysis of human movement: A survey","volume":"73","author":"Gavrila","year":"1999","journal-title":"Comp. 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Survey of pedestrian detection for advanced driver assistance systems. IEEE Trans. Pattern Anal. Mach. Intell., (in press); Available online: http:\/\/www.cvc.uab.es\/adas\/publications\/geronimo_pami2009.pdf (accessed on 20 January 2010)."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"2179","DOI":"10.1109\/TPAMI.2008.260","article-title":"Monocular pedestrian detection: Survey and experiments","volume":"31","author":"Enzweiler","year":"2009","journal-title":"IEEE Trans. Pattern Anal. Mach. Intell"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"467","DOI":"10.1109\/34.55106","article-title":"Stochastic analysis of stereo quantization error","volume":"12","author":"Aggarwal","year":"1990","journal-title":"IEEE Trans. Pattern Anal. Mach. Intell"},{"key":"ref_8","unstructured":"Chienchung, C., Chatterjee, S, and Kube, P.R. (1994, January November). A quantization error analysis for convergent stereo. Austin, TX, USA."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"239","DOI":"10.1109\/JRA.1987.1087097","article-title":"Error modelling in stereo navigation","volume":"RA-3","author":"Matthies","year":"1987","journal-title":"IEEE J. Rob. Autom"},{"key":"ref_10","unstructured":"Xiong, Y, and Matthies, L. (1997, January June). Error analysis of a real-time stereo system. San Juan, Puerto Rico."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Hartley, R, and Zisserman, A. (2003). Multiple View Geometry in Computer Vision, Cambridge University Press.","DOI":"10.1017\/CBO9780511811685"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"292","DOI":"10.1109\/TITS.2007.894194","article-title":"Combination of feature extraction methods for SVM pedestrian detection","volume":"8","author":"Parra","year":"2007","journal-title":"IEEE Trans. Intell. Transp. 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Time-to-collision and collision avoidance systems. Salzburg, Austria."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/10\/4\/3741\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T22:02:07Z","timestamp":1760220127000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/10\/4\/3741"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2010,4,13]]},"references-count":16,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2010,4]]}},"alternative-id":["s100403741"],"URL":"https:\/\/doi.org\/10.3390\/s100403741","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2010,4,13]]}}}