PARALLAX IN A DYNAMIC, NON-CONTACT & NON-DESTRUCTIVE, PRECISE LENGTH MEASUREMENT

If a dimensional measurement on an object is to be performed during its non-perturbed motion, a specific approach is needed. In this article we consider length measurement of an object based on photographs of the object during its unperturbed motion. The main obstacle for determining measured length is the parallax which is generated as a convolution of contributions occurring in different parts of a measuring system. The quantitative expressions for the parallax are derived, and applied onto processing of the photos. As a result, we derive in a closed form the algorithm for quantitative estimates of the precisely measured length and accompanied standard deviation.Original Abstract: Za dimenzijska mjerenja na objektima u nesmetanom gibanju potreban je specificni pristup. U ovom radurazmatramo mjerenje duljine objekata u neometanom gibanju pomocu snimljenih fotografija objekta. Glavna prepreka odredivanju mjerene duljine je paralaksa koja je generirana kao niz doprinosa koji nastaju u razlicitim dijelovima mjernog sustava. Kvantitativni izraz za paralaksu je izveden i primijenjen na analizu fotografija. Kao rezultat, u zatvorenom obliku izveden je algoritam kvantitativne procjene mjerene duljine i pripadnog standardnog odstupanja.