{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,23]],"date-time":"2023-10-23T06:41:06Z","timestamp":1698043266522},"reference-count":17,"publisher":"Wiley","issue":"8","license":[{"start":{"date-parts":[[2007,3,21]],"date-time":"2007-03-21T00:00:00Z","timestamp":1174435200000},"content-version":"vor","delay-in-days":6653,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Systems &amp;amp; Computers in Japan"],"published-print":{"date-parts":[[1989,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The range image measured by the structured light projection has a merit in that the high\u2010density three\u2010dimensional data of the object can be obtained with a high speed, in a stable way and without ambiguity, independently of the smoothness of the object. In this study, a high\u2010speed driven structured light projector is realized by applying a liquid crystal shutter to the projection system. By incorporating the technique with the Gray code pattern projection spatially coded three\u2010dimensional measurement system, a highspeed range\u2010imaging system (Liquid Crystal Range Finder) is constructed. For the liquid crystal range finder, several elaborations are presented, such as stabilization of the measurement and improvement of the accuracy. As to the stabilization, a projection pattern extraction method is developed which excludes the effect of the texture of the object surface or the effect of the environmental illumination, using two complementary projection patterns. As to the improvement of the accuracy, the following elaborations are made. A double\u2010precision pattern is generated by shifting the liquid crystal shutter by a half\u2010pitch, utilizing the feature of Gray code pattern. The projector coordinate is determined with a high accuracy by the interpolation of the spatial code and the interpolation of the projection pattern boundary based on the gray level of the pixel. The usefulness of those techniques is demonstrated by actual measurement.<\/jats:p>","DOI":"10.1002\/scj.4690200809","type":"journal-article","created":{"date-parts":[[2007,7,7]],"date-time":"2007-07-07T18:37:57Z","timestamp":1183833477000},"page":"89-99","source":"Crossref","is-referenced-by-count":2,"title":["Liquid crystal range finder\u2014a high\u2010speed range\u2010imaging system using liquid crystal shutter"],"prefix":"10.1002","volume":"20","author":[{"given":"Kosuke","family":"Sato","sequence":"first","affiliation":[]},{"given":"Seiji","family":"Inokuchi","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2007,3,21]]},"reference":[{"key":"e_1_2_1_2_2","unstructured":"A.Rosenfeld.Techniques for 3\u2010D Machine Perception. North\u2010Holland (1986)."},{"key":"e_1_2_1_3_2","unstructured":"K.Sugihara.Trends in three\u2010dimensional measurement using images. 17th Image Eng. Conf. (1986)."},{"key":"e_1_2_1_4_2","article-title":"Input and processing of distance image","volume":"86","author":"Yamamoto Tamune","year":"1987","journal-title":"Papers of Technical Group on Information Eng., I.E.C.I.E., Japan"},{"key":"e_1_2_1_5_2","doi-asserted-by":"crossref","unstructured":"BastuschechandSchwartz.Experimental Implementation of a Ratio Image Depth Sensor. Techniques for 3\u2010D Machine Perception. North\u2010Holland (1986).","DOI":"10.1016\/B978-0-444-87901-1.50004-5"},{"key":"e_1_2_1_6_2","article-title":"Acquisiton of distance image using rainbow range finder","volume":"86","author":"Tajima J.","year":"1986","journal-title":"Tech. Rep., Computer Vision, Inf. Proc. Soc. Jap."},{"key":"e_1_2_1_7_2","article-title":"Measurement of curved surface by coded pattern projection","volume":"6","author":"Morita","year":"1985","journal-title":"Nat. Conv. I.E.C.E., Japan"},{"issue":"6","key":"e_1_2_1_8_2","first-page":"411","article-title":"Input of coded grating image and extraction of object shape","volume":"61","author":"Yonezawa","year":"1978","journal-title":"Trans. (D), I.E.C.E., Japan"},{"issue":"8","key":"e_1_2_1_9_2","first-page":"780","article-title":"Time\u2010series coded grating method and its implementation","volume":"64","author":"Ueda","year":"1981","journal-title":"Trans. (D), I.E.C.E., Japan"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1016\/0146-664X(82)90096-X"},{"issue":"3","key":"e_1_2_1_11_2","first-page":"369","article-title":"Distance image input by spatial coding","volume":"68","author":"Sato K.","year":"1985","journal-title":"Trans. (D), I.E.C.E., Japan"},{"key":"e_1_2_1_12_2","unstructured":"K.SatoandS.Inokuchi.Range\u2010Imaging System Utilizing Nematic Liquid Crystal Mask. 1st International Conference on Computer Vision London (1987)."},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1117\/12.931988"},{"key":"e_1_2_1_14_2","unstructured":"Nakazawaet al.Development of three\u2010dimensional shape measurement system using fiber grating. 16th Image Conf. (1985)."},{"issue":"2","key":"e_1_2_1_15_2","article-title":"Recognition of polyhedra with a range finder","volume":"4","author":"Shirae","year":"1976","journal-title":"Pattern Recognition"},{"issue":"4","key":"e_1_2_1_16_2","doi-asserted-by":"crossref","DOI":"10.1109\/TIM.1981.6312406","article-title":"Range data entry techniques using a laser spot scanner and two solid\u2010state image sensors","volume":"30","author":"Nishikawa","year":"1980","journal-title":"IEEE Trans. Instrum. & Meas."},{"key":"e_1_2_1_17_2","volume-title":"Computer Vision","author":"Ballard","year":"1982"},{"key":"e_1_2_1_18_2","article-title":"System parameter for three\u2010dimensional measurement","volume":"1631","author":"Yamamoto","year":"1985","journal-title":"Nat. Conv., I.E.C.E., Japan"}],"container-title":["Systems and Computers in Japan"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Fscj.4690200809","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/scj.4690200809","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,10,22]],"date-time":"2023-10-22T07:56:56Z","timestamp":1697961416000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1002\/scj.4690200809"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1989,1]]},"references-count":17,"journal-issue":{"issue":"8","published-print":{"date-parts":[[1989,1]]}},"alternative-id":["10.1002\/scj.4690200809"],"URL":"https:\/\/doi.org\/10.1002\/scj.4690200809","archive":["Portico"],"relation":{},"ISSN":["0882-1666","1520-684X"],"issn-type":[{"value":"0882-1666","type":"print"},{"value":"1520-684X","type":"electronic"}],"subject":[],"published":{"date-parts":[[1989,1]]}}}